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Forex Signals Reddit: top providers review (part 1)

Forex Signals Reddit: top providers review (part 1)

Forex Signals - TOP Best Services. Checked!

To invest in the financial markets, we must acquire good tools that help us carry out our operations in the best possible way. In this sense, we always talk about the importance of brokers, however, signal systems must also be taken into account.
The platforms that offer signals to invest in forex provide us with alerts that will help us in a significant way to be able to carry out successful operations.
For this reason, we are going to tell you about the importance of these alerts in relation to the trading we carry out, because, without a doubt, this type of system will provide us with very good information to invest at the right time and in the best assets in the different markets. financial
Within this context, we will focus on Forex signals, since it is the most important market in the world, since in it, multiple transactions are carried out on a daily basis, hence the importance of having an alert system that offers us all the necessary data to invest in currencies.
Also, as we all already know, cryptocurrencies have become a very popular alternative to investing in traditional currencies. Therefore, some trading services/tools have emerged that help us to carry out successful operations in this particular market.
In the following points, we will detail everything you need to know to start operating in the financial markets using trading signals: what are signals, how do they work, because they are a very powerful help, etc. Let's go there!

What are Forex Trading Signals?

https://preview.redd.it/vjdnt1qrpny51.jpg?width=640&format=pjpg&auto=webp&s=bc541fc996701e5b4dd940abed610b59456a5625
Before explaining the importance of Forex signals, let's start by making a small note so that we know what exactly these alerts are.
Thus, we will know that the signals on the currency market are received by traders to know all the information that concerns Forex, both for assets and for the market itself.
These alerts allow us to know the movements that occur in the Forex market and the changes that occur in the different currency pairs. But the great advantage that this type of system gives us is that they provide us with the necessary information, to know when is the right time to carry out our investments.
In other words, through these signals, we will know the opportunities that are presented in the market and we will be able to carry out operations that can become quite profitable.
Profitability is precisely another of the fundamental aspects that must be taken into account when we talk about Forex signals since the vast majority of these alerts offer fairly reliable data on assets. Similarly, these signals can also provide us with recommendations or advice to make our operations more successful.

»Purpose: predict movements to carry out Profitable Operations

In short, Forex signal systems aim to predict the behavior that the different assets that are in the market will present and this is achieved thanks to new technologies, the creation of specialized software, and of course, the work of financial experts.
In addition, it must also be borne in mind that the reliability of these alerts largely lies in the fact that they are prepared by financial professionals. So they turn out to be a perfect tool so that our investments can bring us a greater number of benefits.

The best signal services today

We are going to tell you about the 3 main alert system services that we currently have on the market. There are many more, but I can assure these are not scams and are reliable. Of course, not 100% of trades will be a winner, so please make sure you apply proper money management and risk management system.

1. 1000pipbuilder (top choice)

Fast track your success and follow the high-performance Forex signals from 1000pip Builder. These Forex signals are rated 5 stars on Investing.com, so you can follow every signal with confidence. All signals are sent by a professional trader with over 10 years investment experience. This is a unique opportunity to see with your own eyes how a professional Forex trader trades the markets.
The 1000pip Builder Membership is ordinarily a signal service for Forex trading. You will get all the facts you need to successfully comply with the trading signals, set your stop loss and take earnings as well as additional techniques and techniques!
You will get easy to use trading indicators for Forex Trades, including your entry, stop loss and take profit. Overall, the earnings target per months is 350 Pips, depending on your funding this can be a high profit per month! (In fact, there is by no means a guarantee, but the past months had been all between 600 – 1000 Pips).
>>>Know more about 1000pipbuilder
Your 1000pip builder membership gives you all in hand you want to start trading Forex with success. Read the directions and wait for the first signals. You can trade them inside your demo account first, so you can take a look at the performance before you make investments real money!
Features:
  • Free Trial
  • Forex signals sent by email and SMS
  • Entry price, take profit and stop loss provided
  • Suitable for all time zones (signals sent over 24 hours)
  • MyFXBook verified performance
  • 10 years of investment experience
  • Target 300-400 pips per month
Pricing:
https://preview.redd.it/zjc10xx6ony51.png?width=668&format=png&auto=webp&s=9b0eac95f8b584dc0cdb62503e851d7036c0232b
VISIT 1000ipbuilder here

2. DDMarkets

Digital Derivatives Markets (DDMarkets) have been providing trade alert offerings since May 2014 - fully documenting their change ideas in an open and transparent manner.
September 2020 performance report for DD Markets.
Their manner is simple: carry out extensive research, share their evaluation and then deliver a trading sign when triggered. Once issued, daily updates on the trade are despatched to members via email.
It's essential to note that DDMarkets do not tolerate floating in an open drawdown in an effort to earnings at any cost - a common method used by less professional providers to 'fudge' performance statistics.
Verified Statistics: Not independently verified.
Price: plans from $74.40 per month.
Year Founded: 2014
Suitable for Beginners: Yes, (includes handy to follow trade analysis)
VISIT
-------

3. JKonFX

If you are looking or a forex signal service with a reliable (and profitable) music record you can't go previous Joel Kruger and the team at JKonFX.
Trading performance file for JKonFX.
Joel has delivered a reputable +59.18% journal performance for 2016, imparting real-time technical and fundamental insights, in an extremely obvious manner, to their 30,000+ subscriber base. Considered a low-frequency trader, alerts are only a small phase of the overall JKonFX subscription. If you're searching for hundreds of signals, you may want to consider other options.
Verified Statistics: Not independently verified.
Price: plans from $30 per month.
Year Founded: 2014
Suitable for Beginners: Yes, (includes convenient to follow videos updates).
VISIT

The importance of signals to invest in Forex

Once we have known what Forex signals are, we must comment on the importance of these alerts in relation to our operations.
As we have already told you in the previous paragraph, having a system of signals to be able to invest is quite advantageous, since, through these alerts, we will obtain quality information so that our operations end up being a true success.

»Use of signals for beginners and experts

In this sense, we have to say that one of the main advantages of Forex signals is that they can be used by both beginners and trading professionals.
As many as others can benefit from using a trading signal system because the more information and resources we have in our hands. The greater probability of success we will have. Let's see how beginners and experts can take advantage of alerts:
  • Beginners: for inexperienced these alerts become even more important since they will thus have an additional tool that will guide them to carry out all operations in the Forex market.
  • Professionals: In the same way, professionals are also recommended to make use of these alerts, so they have adequate information to continue bringing their investments to fruition.
Now that we know that both beginners and experts can use forex signals to invest, let's see what other advantages they have.

»Trading automation

When we dedicate ourselves to working in the financial world, none of us can spend 24 hours in front of the computer waiting to perform the perfect operation, it is impossible.
That is why Forex signals are important, because, in order to carry out our investments, all we will have to do is wait for those signals to arrive, be attentive to all the alerts we receive, and thus, operate at the right time according to the opportunities that have arisen.
It is fantastic to have a tool like this one that makes our work easier in this regard.

»Carry out profitable Forex operations

These signals are also important, because the vast majority of them are usually quite profitable, for this reason, we must get an alert system that provides us with accurate information so that our operations can bring us great benefits.
But in addition, these Forex signals have an added value and that is that they are very easy to understand, therefore, we will have a very useful tool at hand that will not be complicated and will end up being a very beneficial weapon for us.

»Decision support analysis

A system of currency market signals is also very important because it will help us to make our subsequent decisions.
We cannot forget that, to carry out any type of operation in this market, previously, we must meditate well and know the exact moment when we will know that our investments are going to bring us profits .
Therefore, all the information provided by these alerts will be a fantastic basis for future operations that we are going to carry out.

»Trading Signals made by professionals

Finally, we have to recall the idea that these signals are made by the best professionals. Financial experts who know perfectly how to analyze the movements that occur in the market and changes in prices.
Hence the importance of alerts, since they are very reliable and are presented as a necessary tool to operate in Forex and that our operations are as profitable as possible.

What should a signal provider be like?

https://preview.redd.it/j0ne51jypny51.png?width=640&format=png&auto=webp&s=5578ff4c42bd63d5b6950fc6401a5be94b97aa7f
As you have seen, Forex signal systems are really important for our operations to bring us many benefits. For this reason, at present, there are multiple platforms that offer us these financial services so that investing in currencies is very simple and fast.
Before telling you about the main services that we currently have available in the market, it is recommended that you know what are the main characteristics that a good signal provider should have, so that, at the time of your choice, you are clear that you have selected one of the best systems.

»Must send us information on the main currency pairs

In this sense, one of the first things we have to comment on is that a good signal provider, at a minimum, must send us alerts that offer us information about the 6 main currencies, in this case, we refer to the euro, dollar, The pound, the yen, the Swiss franc, and the Canadian dollar.
Of course, the data you provide us will be related to the pairs that make up all these currencies. Although we can also find systems that offer us information about other minorities, but as we have said, at a minimum, we must know these 6.

»Trading tools to operate better

Likewise, signal providers must also provide us with a large number of tools so that we can learn more about the Forex market.
We refer, for example, to technical analysis above all, which will help us to develop our own strategies to be able to operate in this market.
These analyzes are always prepared by professionals and study, mainly, the assets that we have available to invest.

»Different Forex signals reception channels

They must also make available to us different ways through which they will send us the Forex signals, the usual thing is that we can acquire them through the platform's website, or by a text message and even through our email.
In addition, it is recommended that the signal system we choose sends us a large number of alerts throughout the day, in order to have a wide range of possibilities.

»Free account and customer service

Other aspects that we must take into account to choose a good signal provider is whether we have the option of receiving, for a limited time, alerts for free or the profitability of the signals they emit to us.
Similarly, a final aspect that we must emphasize is that a good signal system must also have excellent customer service, which is available to us 24 hours a day and that we can contact them at through an email, a phone number, or a live chat, for greater immediacy.
Well, having said all this, in our last section we are going to tell you which are the best services currently on the market. That is, the most suitable Forex signal platforms to be able to work with them and carry out good operations. In this case, we will talk about ForexPro Signals, 365 Signals and Binary Signals.

Forex Signals Reddit: conclusion

To be able to invest properly in the Forex market, it is convenient that we get a signal system that provides us with all the necessary information about this market. It must be remembered that Forex is a very volatile market and therefore, many movements tend to occur quickly.
Asset prices can change in a matter of seconds, hence the importance of having a system that helps us analyze the market and thus know, what is the right time for us to start operating.
Therefore, although there are currently many signal systems that can offer us good services, the three that we have mentioned above are the ones that are best valued by users, which is why they are the best signal providers that we can choose to carry out. our investments.
Most of these alerts are quite profitable and in addition, these systems usually emit a large number of signals per day with full guarantees. For all this, SignalsForexPro, Signals365, or SignalsBinary are presented as fundamental tools so that we can obtain a greater number of benefits when we carry out our operations in the currency market.
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Video Encoding in Simple Terms

Video Encoding in Simple Terms
Nowadays, it is difficult to imagine a field of human activity, in which, in one way or another, digital video has not entered. We watch it on TV, mobile devices, and stationary computers; we record it with digital cameras ourselves, or we encounter it on the roads (unpleasant, but true), in stores, hospitals, schools and universities, and in industrial enterprises of various profiles. As a consequence, words and terms that are directly related to the digital representation of video information are becoming more firmly and widely embedded in our lives. From time to time, questions arise in this area. What are the differences between various devices or programs that we use to encode/ decode digital video data, and what do they do? Which of these devices/ programs are better or worse, and in which aspects? What do all these endless MPEG-2, H.264 / AVC, VP9, H.265 / HEVC, etc. mean? Let’s try to understand.

A very brief historical reference

The first generally accepted video compression standard MPEG-2 was finally adopted in 1996, after which a rapid development of digital satellite television began. The next standard was MPEG-4 part 10 (H.264 / AVC), which provides twice the degree of video data compression. It was adopted in 2003, which led to the development of DVB-T/ C systems, Internet TV and the emergence of a variety of video sharing and video communication services. From 2010 to 2013, the Joint Collaborative Team on Video Coding (JCT-VC) was intensively working to create the next video compression standard, which was called High Efficient Video Coding (HEVC) by the developers; it ensured the following twofold increase in the compression ratio of digital video data. This standard was approved in 2013. That same year, the VP9 standard, developed by Google, was adopted, which was supposed to not yield to HEVC in its degree of video data compression.

Basic stages of video encoding

There are a few simple ideas at the core of algorithms for video data compression. If we take some part of an image (in the MPEG-2 and AVC standards this part is called a macroblock), then there is a big possibility that, near this segment in this frame or in neighboring frames, there will be a segment containing a similar image, which differs little in pixel intensity values. Thus, to transmit information about the image in the current segment, it is enough to only transfer its difference from the previously encoded similar segment. The process of finding similar segments among previously encoded images is called Prediction. A set of difference values that determine the difference between the current segment and the found prediction is called the Residual. Here we can distinguish two main types of prediction. In the first one, the Prediction values represent a set of linear combinations of pixels adjacent to the current image segment on the left and on the top. This type of prediction is called Intra Prediction. In the second one, linear combinations of pixels of similar image segments from previously encoded frames are used as prediction (these frames are called Reference). This type of prediction is called Inter Prediction. To restore the image of the current segment, encoded with Inter prediction, when decoding, it is necessary to have information about not only the Residual, but also the frame number, where a similar segment is located, and the coordinates of this segment.
Residual values obtained during prediction obviously contain, on average, less information than the original image and, therefore, require a fewer quantity of bits for image transmission. To further increase the degree of compression of video data in video coding systems, some spectral transformation is used. Typically, this is Fourier cosine transform. Such transformation allows us to select the fundamental harmonics in two-dimensional Residual signal. Such a selection is made at the next stage of coding — quantization. The sequence of quantized spectral coefficients contains a small number of main, large values. The remaining values are very likely to be zero. As a result, the amount of information contained in quantized spectral coefficients is significantly (dozens of times) lower than in the original image.
In the next stage of coding, the obtained set of quantized spectral coefficients, accompanied by the information necessary for performing prediction when decoding, is subjected to entropy coding. The bottom line here is to align the most common values of the encoded stream with the shortest codeword (containing the smallest number of bits). The best compression ratio (close to theoretically achievable) at this stage is provided by arithmetic coding algorithms, which are mainly used in modern video compression systems.
From the above, the main factors affecting the effectiveness of a particular video compression system become apparent. First of all, these are, of course, the factors that determine the effectiveness of the Intra and Inter Predictions. The second set of factors is related to the orthogonal transformation and quantization, which selects the fundamental harmonics in the Residual signal. The third one is determined by the volume and compactness of the representation of additional information accompanying Residual and necessary for making predictions, that is, calculating Prediction, in the decoder. Finally, the fourth set has the factors that determine the effectiveness of the final stage- entropy coding.
Let’s illustrate some possible options (far from all) of the implementation of the coding stages listed above, on the example of H.264 / AVC and HEVC.

AVC Standard

In the AVC standard, the basic structural unit of the image is a macroblock — a square area of 16x16 pixels (Figure 1). When searching for the best possible prediction, the encoder can select one of several options of partitioning each macroblock. With Intra-prediction, there are three options: perform a prediction for the entire block as a whole, break the macroblock into four square blocks of 8x8 size, or into 16 blocks with a size of 4x4 pixels, and perform a prediction for each such block independently. The number of possible options of macroblock partitioning under Inter-prediction is much richer (Figure 1), which provides adaptation of the size and position of the predicted blocks to the position and shape of the object boundaries moving in the video frame.
Fig 1. Macroblocks in AVC and possible partitioning when using Inter-Prediction.
In AVC, pixel values from the column to the left of the predicted block and the row of pixels immediately above it are used for Intra prediction (Figure 2). For blocks of sizes 4x4 and 8x8, 9 methods of prediction are used. In a prediction called DC, all calculated pixels have a single value equal to the arithmetic average of the “neighbor pixels” highlighted in Fig. 2 with a bold line. In other modes, “angular” prediction is performed. In this case, the values of the “neighbor pixels” are placed inside the predicted block in the directions indicated in Fig. 2.
In the event that the predicted pixel gets between “neighbor pixels”, when moving in a given direction, an interpolated value is used for the prediction. For blocks with a size of 16x16 pixels, 4 methods of prediction are used. One of them is the DC-prediction, which was already reviewed. The other two correspond to the “angular” methods, with the directions of prediction 0 and 1. Finally, the fourth — Plane-prediction: the values of the predicted pixels are determined by the equation of the plane. The angular coefficients of the equation are determined by the values of the “neighboring pixels”.
Fig 2. “Neighboring pixels” and angular modes of Intra-Prediction in AVC
Inter- Prediction in AVC can be implemented in one of two ways. Each of these options determines the type of macroblock (P or B). As a prediction of pixel values in P-blocks (Predictive-blocks), the values of pixels from the area located on the previously coded (reference) image, are used. Reference images are not deleted from the RAM buffer, containing decoded frames (decoded picture buffer, or DPB), as long as they are needed for Inter-prediction. A reference list is created in the DPB from the indexes of these images.
The encoder signals to the decoder about the number of the reference image in the list and about the offset of the area used for prediction, with respect to the position of predicted block (this displacement is called motion vector). The offset can be determined with an accuracy of ¼ pixel. In case of prediction with non-integer offset, interpolation is performed. Different blocks in one image can be predicted by areas located on different reference images.
In the second option of Inter Prediction, prediction of the B-block pixel values (bi-predictive block), two reference images are used; their indexes are placed in two lists (list0 and list1) in the DPB. The two indexes of reference images in the lists and two offsets, that determine positions of reference areas, are transmitted to the decoder. The B-block pixel values are calculated as a linear combination of pixel values from the reference areas. For non-integer offsets, interpolation of reference image is used.
As already mentioned, after predicting the values of the encoded block and calculating the Residual signal, the next coding step is spectral transformation. In AVC, there are several options for orthogonal transformations of the Residual signal. When Intra-prediction of a whole macroblock with a size of 16x16 is implemented, the residual signal is divided into 4x4 pixel blocks; each of them is subjected to an integer analog of discrete two-dimensional 4x4 cosine Fourier transform.
The resulting spectral components, corresponding to zero frequency (DC) in each block, are then subjected to additional orthogonal Walsh-Hadamard transform. With Inter-prediction, the Residual signal is divided into blocks of 4x4 pixels or 8x8 pixels. Each block is then subjected to a 4x4 or 8x8 (respectively) two-dimensional discrete cosine Fourier Transform (DCT, from Discrete Cosine Transform).
In the next step, spectral coefficients are subjected to the quantization procedure. This leads to a decrease in bit capacity of digits representing the spectral sample values, and to a significant increase in the number of samples having zero values. These effects provide compression, i.e. reduce the number and bit capacity of digits representing the encoded image. The reverse side of quantization is the distortion of the encoded image. It is clear that the larger the quantization step, the greater is the compression ratio, but also the distortion is greater.
The final stage of encoding in AVC is entropy coding, implemented by the algorithms of Context Adaptive Binary Arithmetic Coding. This stage provides additional compression of video data without distortion in the encoded image.

Ten years later. HEVC standard: what’s new?

The new H.265/HEVC standard is the development of methods and algorithms for compressing video data embedded in H.264/AVC. Let’s briefly review the main differences.
An analog of a macroblock in HEVC is the Coding Unit (CU). Within each block, areas for calculation of Prediction are selected — Prediction Unit (PU). Each CU also specifies the limits within which the areas for calculating the discrete orthogonal transformation from the residual signal are selected. These areas are called the Transform Unit (TU).
The main distinguishing feature of HEVC here is that the split of a video frame into CU is conducted adaptively, so that it is possible to adjust the CU boundaries to the boundaries of objects on the image (Figure 3). Such adaptability allows to achieve an exceptionally high quality of prediction and, as a consequence, a low level of the residual signal.
An undoubted advantage of such an adaptive approach to frame division into blocks is also an extremely compact description of the partition structure. For the entire video sequence, the maximum and minimum possible CU sizes are set (for example, 64x64 is the maximum possible CU, 8x8 is the minimum). The entire frame is covered with the maximum possible CUs, left to right, top-to-bottom.
It is obvious that, for such coverage, transmission of any information is not required. If partition is required within any CU, then this is indicated by a single flag (Split Flag). If this flag is set to 1, then this CU is divided into 4 CUs (with a maximum CU size of 64x64, after partitioning we get 4 CUs of size 32x32 each).
For each of the CUs received, a Split Flag value of 0 or 1 can, in turn, be transmitted. In the latter case, this CU is again divided into 4 CUs of smaller size. The process continues recursively until the Split Flag of all received CUs is equal to 0 or until the minimum possible CU size is reached. Inserted CUs thus form a quad tree (Coding Tree Units, CTU). As already mentioned, within each CU, areas for calculating prediction- Prediction Units (PU) are selected. With Intra Prediction, the CU area can coincide with the PU (2Nx2N mode) or it can be divided into 4 square PUs of twice smaller size (NxN mode, available only for CU of minimum size). With Inter Prediction, there are eight possible options for partitioning each CU into PUs (Figure 3).
Fig.3 Video frame partitioning into CUs is conducted adaptively
The idea of spatial prediction in HEVC remained the same as in AVC. Linear combinations of neighboring pixel values, adjacent to the block on the left and above, are used as predicted sample values in the PU block. However, the set of methods for spatial prediction in HEVC has become significantly richer. In addition to Planar (analogue to Plane in AVC) and DC methods, each PU can be predicted by one of the 33 ways of “angular” prediction. That is, the number of ways, in which the values are calculated by “neighbor”-pixels, is increased by 4 times.
Fig. 4. Possible partitioning of the Coding Unit into Prediction Units with the spatial (Intra) and temporary (Inter) CU prediction modes
We can point out two main differences of Inter- prediction between HEVC and AVC. Firstly, HEVC uses better interpolation filters (with a longer impulse response) when calculating reference images with non-integer offset. The second difference concerns the way the information about the reference area, required by the decoder for performing the prediction, is presented. In HEVC, a “merge mode” is introduced, where different PUs, with the same offsets of reference areas, are combined. For the entire combined area, information about motion (motion vector) is transmitted in the stream once, which allows a significant reduction in the amount of information transmitted.
In HEVC, the size of the discrete two-dimensional transformation, to which the Residual signal is subjected, is determined by the size of the square area called the Transform Unit (TU). Each CU is the root of the TU quad tree. Thus, the TU of the upper level coincides with the CU. The root TU can be divided into 4 parts of half the size, each of which, in turn, is a TU and can be further divided.
The size of discrete transformation is determined by the TU size of the lower level. In HEVC, transforms for blocks of 4 sizes are defined: 4x4, 8x8, 16x16, and 32x32. These transformations are integer analogs of the discrete two-dimensional Fourier cosine transform of corresponding size. For size 4x4 TU with Intra-prediction, there is also a separate discrete transformation, which is an integer analogue of the discrete sine Fourier transform.
The ideas of the procedure of quantizing spectral coefficients of Residual signal, and also entropy coding in AVC and in HEVC, are practically identical.
Let’s note one more point which was not mentioned before. The quality of decoded images and the degree of video data compression are influenced significantly by post-filtering, which decoded images with Inter-prediction undergo before they are placed in the DPB.
In AVC, there is one kind of such filtering — deblocking filter. Application of this filter reduces the block effect resulting from quantization of spectral coefficients after orthogonal transformation of Residual signal.
In HEVC, a similar deblocking filter is used. Besides, an additional non-linear filtering procedure called the Sample Adaptive Offset (SAO) exists. Based on the analysis of pixel value distribution during encoding, a table of corrective offsets, added to the values of a part of CU pixels during decoding, is determined.
In HEVC, the size of the discrete two-dimensional transformation, to which the Residual signal is subjected, is determined by the size of the square area called the Transform Unit (TU). Each CU is the quad-tree of TU’s. Thus, the TU of the upper level coincides with the CU. The root TU can be divided into 4 parts of half the size, each of which, in turn, is a TU and can be further divided.
The size of discrete transformation is determined by the TU size of the lower level. There are four transform block sizes in HEVC: 4x4, 8x8, 16x16, and 32x32. These transforms are discrete two-dimensional Fourier cosine transform of corresponding size. For 4x4 Intra-predicted blocks, could be used another discrete transform — sine Fourier transform.
The quantization of spectral coefficients of residual signal, and entropy coding in AVC and in HEVC, are almost identical.
Let’s note one more point which was not mentioned before. The quality of decoded images, hence the degree of video data compression, is influenced significantly by post-filtering, which applied on decoded Inter-predicted images before they are placed in the DPB.
In AVC, there is one kind of such filtering — deblocking filter. It masking blocking artifacts effect originating from spectral coefficients quantization after orthogonal transformation of residual signal.
In HEVC, a similar deblocking filter is used. Besides, an additional non-linear filtering procedure called the Sample Adaptive Offset (SAO) exists. Sample level correction is based either on local neighborhood or on the intensity level of sample itself. Table of sample level corrections, added to the values of a part of CU pixels during decoding, is determined.

And what is the result?

Figures 4–7 show the results of encoding of several high-resolution (HD) video sequences by two encoders. One of the encoders compresses the video data in the H.265/HEVC standard (marked as HM on all the graphs), and the second one is in the H.264/AVC standard.
Fig. 5. Encoding results of the video sequence Aspen (1920x1080 30 frames per second)
Fig. 6. Encoding results of the video sequence BlueSky (1920x1080 25 frames per second)
Fig. 7. Encoding results of the video sequence PeopleOnStreet (1920x1080 30 frames per second)
Fig. 8. Encoding results of the video sequence Traffic (1920x1080 30 frames per second)
Coding was performed at different quantization values of spectral coefficients, hence with different levels of video image distortion. The results are presented in Bitrate (mbps) — PSNR(dB) coordinates. PSNR values characterize the degree of distortion.
On average, it can be stated that the PSNR range below 36 dB corresponds to a high level of distortion, i.e. low quality video images. The range of 36 to 40 dB corresponds to the average quality. With PSNR values above 40 dB, we can call it a high video quality.
We can roughly estimate the compression ratio provided by the encoding systems. In the medium quality area, the bit rate provided by the HEVC encoder is about 1.5 times less than the bit rate of the AVC encoder. Bitrate of an uncompressed video stream is easily determined as the product of the number of pixels in each video frame (1920 x 1080) by the number of bits required to represent each pixel (8 + 2 + 2 = 12), and the number of frames per second (30).
As a result, we get about 750 Mbps. It can be seen from the graphs that, in the area of average quality, the AVC encoder provides a bit rate of about 10–12 Mbit/s. Thus, the degree of video information compression is about 60–75 times. As already mentioned, the HEVC encoder provides compression ratio 1.5 times higher.

About the author

Oleg Ponomarev, 16 years in video encoding and signal digital processing, expert in Statistical Radiophysics, Radio waves propagation. Assistant Professor, PhD at Tomsk State University, Radiophysics department. Head of Elecard Research Lab.
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submitted by Amanda2020-jumi to u/Amanda2020-jumi [link] [comments]

A complete guide of and debunking of audio on Linux, ALSA and Pulse

Hey fellow penguins,
A few days ago, an user asked about audio quality on Linux, and whether it is worse or better than audio on Windows. The thread became a mess quickly, full of misconceptions and urban myths about Linux. I figured it would be worthwhile to create a complete guide to Linux audio, as well as dispelling some myths and misconceptions.
To all be on the same page, this is going to be thorough, slowly introducing more concepts.

What is sound? How and what can I hear?

You might remember from high school that sound is waves traveling through the air. Vibrations of any kind cause molecules in the air to move. When that wave form finds your ears, it causes little hairs in your ear to move. Different hairs are susceptible to different frequencies, and the signals sent by these hairs are turned into sound you hear by your brain.
In reality it is a little more complicated, but for the sake of this post, that's all you need to know.
The pitch of sound comes from its frequency, the 'shorter' the waves are in a waveform, the higher the sound. The volume of sound comes from how 'tall' the waves are. Human hearing sits in a range between 20Hz and 20,000 Hz, though it deviates per person. Being the egocentric species we are, waves below 20 Hz are called 'infrasound' and waves above 20kHz are called 'ultrasound.' Almost no humans can hear beyond ultrasound, you will find that your hearing probably cuts off at 16kHz.
To play around with this, check out this tone generator, you can prove anything above with this yourself. As a fun fact: human hearing is actually really bad, we've among the most limited frequency ranges. A cat can hear up to 40kHz, and dolphins can even hear up to 160kHz!!
FACT: Playing loud music is dangerous! If you listen to music and you are feeling a discomfort, you should turn the volume down. A true alert is when you hear a beep - this is called tinnitus, and that beep you're hearing is pretty much the death cry of the cells that can hear that frequency. That beep is the last time you will hear that very specific frequency ever again. Please, listening to loud music is not worth the permanent hearing damage, please dial it down for your own sake! <3

How does my computer generate sound?

To listen to sound, you will probably be using headphones or speakers, inside of them are cones that are driven by an electromagnet, causing them to vibrate at very precise frequencies. This is essentially how sound works, though modern headphones certainly can be pretty complex.
To drive that magnet, an audio source will send an analog signal (a waveform) over a wire to the driver, causing it to move at the frequency of that waveform. This is in essence how audio playback works; and we're not going to get into it much deeper than this.
Computers are digital - which is to say, they don't do analog; processors understand ON and OFF, they do not understand 38.689138% OFF and 78.21156% ON. When converting an analog signal (like sound) to a digital one, we make use of a format called PCM. For PCM to be turned into an analog signal, you need a DAC - or as you probably know it: a sound card. DAC stands for 'Digital to Analog Converter', or some people mistakenly call it "Digital Audio ConverteChip"
PCM stands for Pulse-code Modulation, which is a way to represent sampled analog signals in a digital format. We're not going to get into it too much here, but imagine taking a sample of a waveform at regular intervals and storing the value, and then rounding that value to a nearest 'step' (remember this). That's PCM.
The fidelity of PCM comes from two elements, which we are going to discuss next: sampling rate and bit depth.

What is sampling rate? Or: HOW SOUND GOOD?

Sampling rate is the most important part of making PCM sound good. Remember how humans hear in a range of 20Hz to 20kHz? The sample rate of audio has a lot to do with this. You cannot capture high frequencies if you do not capture samples often enough. Since our ears can hear up to 20 kHz, you would imagine that 20kHz would be ideal for capturing audio; however, a result of sampling is that you actually need twice the sample rate, this is called the Nyquist-Sannon sampling theorem, which is a complicated thing. Just understand that to reproduce a 20kHz frequency, you need a sample rate of 40kHz.
To have a little bit of room and leeway, we settled on a sample rate of 48kHz (a multiple of 8) for playback, and 96kHz for recording. We record at this frequency only to make sure absolutely no data is lost. You might be more familiar with 44.1kHz for audio, which is a standard we settled on for CD playback and NTSC. A lot of scientific research has been done on sound quality, and there is no evidence to suggest people can tell the difference between 48kHz or anything higher.
MYTH BUST: Humans cannot hear beyond 20 kHz, period. Anyone who claims to be able to is either supernatural or lying to you - I'll let you choose which.

What is bit-depth? Or: HOW IT MAKE SOUND REALLY NICE?

Remember how I told you to remember that PCM rounds values to the nearest step? This has to do with how binary works. The more bits, the bigger the number you can store. In PCM, the bit-depth decides the number of bits of information in each sample. With 16-bit, the range of values that can be stored is 0 to 65535. Going beyond this is pointless for humans, with no scientific research showing any proven benefit, though marketeers would like you to believe there's benefits.
MYTH BUST: 24-bit depth is often touted as 'high-resolution audio', claiming benefits of a better sonic experience. Such is nothing more than marketing speech, there is no meaningful data 24-bit can capture that 16-bit cannot.

Channels? Or: HOW IT CAN MAKE SOUND IN LEFT BUT NOT RIGHT?

We'll briefly touch on the last part of PCM audio, channels. This is very self explanatory, humans have two ears and can hear separate sounds on both of them, which means we have stereo hearing. As a result, most music is recorded with 2 channels. For some surround settings, you need more channels, this is why you may have heard of 5.1 or 7.1; the first digit is the amount of channels the PCM carries.
For most desktop usage, the only sound we care about is 2-channel PCM.

Recap

So, we've covered all the elements of PCM sound. Let's go over it quickly: sample rate is expressed in Hz and is how often a sample of a waveform is captured, representing the x-axis of a waveform. Bit-depth is the bits of information stored in each sample, and represents the y-axis of the waveform. Channels decide how many simultaneous outputs the PCM can drive separately, since we have 2 ears, you need at least two channels.
As a result, the standard audio playback for both consumers and professionals is 48kHz, 16-bit, 2 channel PCM. This is more than enough to fully represent the full range of human hearing.

How it works in Linux

So, now that we know how PCM works, how does Linux make sound? How can you make Linux sound great? A few important components come into play here, and we'll need to discuss each of them in some detail.

ALSA

ALSA is the interface to the kernel's sound driver. ALSA can take a PCM signal and send it to your hardware by talking to the driver. Something important to know about most DACs is that they can only take one signal at a time, actually. That means that only a single application can send sound to ALSA at once. Long ago, in a darker time, you couldn't watch a movie while listening to music!
This problem was solved a long time ago with the use of alsalib, but doing mixing at a library level isn't a very good solution to the problem. This gave rise to sound servers, of which many have existed. Before PulseAudio, esound was a very popular one but had many problems, eventually it was succeeded by PulseAudio.

PulseAudio

When you think audio on Linux, PulseAudio is probably among the first things you think of. PulseAudio is NOT a driver, nor does it talk to your drivers. Actually, PulseAudio only does two things that we'll discuss in detail later. PulseAudio talks to ALSA, taking control of its single audio stream, and allows other applications to talk to PulseAudio instead. Pulse is an 'audio multiplexer', turning multiple signals into one through a process that is called mixing. Mixing is an incredibly complicated subject that we won't talk about here.
To be able to mix sounds, one must make sure that all the PCM sources are in the same format (the one that's being sent to ALSA); if the PCM format being sent to Pulse does not match the PCM format being sent to ALSA, pulse does a step before mixing it called resampling. Resampling is another very complicated subject that can turn a 8kHz, 4-bit, 1-channel PCM stream into a 24kHz, 24-bit, 2-channel PCM stream.
These two things allow you to play a game, listen to music and watch YouTube, and notifications to produce a sound all at the same time. PulseAudio is the most critical element of the Linux sound stack.
FACT: PulseAudio is a contentious subject, many people have a dislike for this particular bit of software. In all honesty, PulseAudio was brought to the general public in a bit of a premature state, breaking audio for many people. PulseAudio these days is a very stable, solid piece of software. If you have audio issues these days, it's usually a problem in ALSA or your driver.

What about JACK and PipeWire?

PulseAudio isn't the only sound servedaemon available for Linux, though it is certainly the most popular and most likely the default of whatever distribution you are using. PulseAudio has become a bit of a standard for Linux sound and has by far the best compatibility with most applications, but that doesn't mean there aren't alternatives.
JACK (JACK Audio Connection Kit, a recursive acronym like GNU) is a sound server focused primarily on low latency. If you are doing professional audio work on Linux, you will already be very familiar with JACK. JACK's development is very focused on low latency, real-time audio and is critical for such people. JACK is available on most distros as an alternative, and you can try it for yourself if you so want; but you might find some applications do not work nicely with JACK.
PipeWire is a project that is currently in development, looking to solve key problems that exist in current sound servers. PipeWire isn't just a sound server but also handles the multiplexing of video sources (like a camera). Special attention has been put into working with sandboxed applications (like Flatpaks), which is an area where PulseAudio is lacking. PipeWire is a very promising project that might very well succeed PulseAudio in the future and you should expect to see appearing in distribution repositories very soon. You can try it yourself right now, though it isn't quite as easy to get started with as JACK is.
More audio servers exist, but are beyond the scope of this post.

What is resampling?

Resampling is the process of turning a PCM stream into another PCM stream of a different resolution. Your DAC only accepts a limited range of PCM signals, and it is up to the software to make sure the PCM stream is compatible. There is almost no DAC out there that doesn't support 44.1kHz, 16-bit, 2-channel PCM, so this tends to be the default. When you play an audio source (like an OggVorbis file), the PCM stream might be 96kHz, 24-bit, 2-channel PCM.
To fix that, PulseAudio will use a resampling algorithm. There are two kinds of resampling methods: upsampling and downsampling. Upsamling is lossless, since you can always represent less data with more data. Downsampling is lossy by definition, you cannot represent 24-bit PCM with 16-bit PCM.
MYTH: Downsampling is a loss in quality! This is only true in a technical sense, or if you are downsampling to less than 48kHz, 16-bit PCM. When you downsample a 96kHz, 24-bit PCM stream to a 48kHz, 16-bit stream, no meaningful data is lost in the process; because the discarded data lies outside of the human ear's hearing range.
FACT: Resampling is expensive. Good quality resampling algorithms actually take a non-trivial amount of processing power. PulseAudio defaults to a resampling method with a good balance between CPU time used and quality.

What is mixing?

Mixing is the process of taking two PCM streams and combining them into one. This is extremely complicated and not something we're going to discuss at length. It is not important to understand how this works, only to understand that it exists. Without mixing, you wouldn't be able to hear sounds from multiple sources. This is true not just for PulseAudio and computer sound, this is true for anything. In real life, you might use an A/V receiver to accept sound from your TV and music player at once, the receiver then mixes the signals and plays it through your speakers.

What is encoding?

Finally we can talk a little about encoding. Encoding is the process of taking a PCM stream and writing it to a permanent format, two types exist. You have lossy encoding and lossless encoding. Lossy encoding removes data from the PCM stream to safe space. Usually the discarded data is useless to you, and will not make a difference in sound quality; examples of lossy encoding are MP3, AAC and Ogg Vorbis. Lossless encoding takes a PCM stream and encodes it in such a way that no data is lost, examples of lossless encodings are FLAC, ALAC and WAV.
Note that lossy and lossless do not mean compressed and uncompressed. A lossless format can be compressed and usually is, as uncompressed lossless encoding would be very large; it would just be the raw PCM stream. An example of lossless uncompressed audio is WAV.
A new element encodings bring is their bit rate, not to be confused with samplerate and bit depth. Bit rate has to do with how much data is stored in every second of audio. For a lossless, uncompressed PCM stream this is easy to calculate with the formula bit rate = sample rate * bit depth * channels, for 16-bit, 48kHz, 2 channel PCM this is 1,5 Mbit. To get the value in bytes, divide by 8, thus 192kB per second.
The bit rate of an encoder means how much the audio will be compressed. PCM compression is super complicated, but it generally involves discarding silence, cutting off frequencies you cannot hear, and so forth. Radio encoding has a bit rate of roughly 128 Kbps, while most CDs have a bit rate of 1360kbps.
Lastly, there is the concept of VBR and CBR. VBR stands for Variable Bit Rate, which CBR stands for Constant Bit Rate. In a VBR encoding, the encoder aim for a target bit rate that you set, but it can deviate if it thinks it needs more or less. CBR will encode a constant bit rate, and will never deviate.
MYTH: Lossless sounds better than lossy. This is blatantly untrue, lossless audio formats were created for perservation and archival reasons. When you encode a lossy file from a lossless source, and you make sure that it's a 48kHz, 16-bit PCM encoding, you will not lose any important information. What is enough depends on the quality of the encoder. For OggVorbis, 192kbps is sufficient, for MP3, 256kbps should be preferred. 320kbps is excessive and the highest quality supported by MP3. In general, 256kbps does the trick, but with storage being abundant these days, you can play it safe and use 320kbps if it makes you feel better.
MYTH: CBR is better than VBR. There is no reason not to use VBR at all, there is no point in writing 256Kbps of data if there is only silence or a constant tone. Let your encoder do what it does best!
FACT: Encoding a lossy format to another lossy format will result in a loss of data! You will compress data that is already compressed, which is really bad. When encoding to a lossy format, always use a high quality recording in a lossless format as the source!
I DON'T BELIEVE YOU: This article from the guys Xiph (the people who brought you FLAC and Ogg Vorbis) explain it better than I can: https://people.xiph.org/%7Exiphmont/demo/neil-young.html

TL;DR, I JUST WANT THE BEST SOUND QUALITY

Here is a quick guide to achieving great sound quality on Linux with the above in mind.
As you can see, there's little you can do in Linux in the first place, so what can you do if you want better sound?
MYTH: Linux sound quality is worse than Windows. They are exactly the same, Pulse doesn't work that different from how Windows does mixing and resampling.
MYTH: Linux sound quality can be better than Windows. They are exactly the same. All improvements in quality come from the driver and your DAC, not the sound server. Pulse and ALSA do not touch the PCM beyond moving it around and resampling it.
I hope this (long) guide was of help to you, and helped to dispell some myths. Did I miss anything? Ask or let me know, and I'll answer the best I can. Did I make any factual errors? Please correct me with a source and I'll amend the post immediately.
submitted by _Spell_ to linux [link] [comments]

LCD Arduino project Display Heart Rate

LCD Arduino project brief introduction
Some time ago, I found a heart rate sensor module MAX30100 in shopping online. This module can collect blood oxygen and heart rate data of users, which is also simple and convenient to use.
According to the data, I found that there are libraries of MAX30100 in the Arduino library files. That is to say, if I use the communication between LCD Arduino and MAX30100, I can directly call the Arduino library files without having to rewrite the driver files. This is a good thing, so I bought the module of MAX30100.
I decided to use Arduino to verify the heart rate and blood oxygen collection function of MAX30100. With STONE TFT LCD screen for monitoring blood pressure.
Note: this module by default only with 3.3 V level MCU communications, because it defaults to using IIC pin pull up the resistance of 4.7 K to 1.8 V, so there is no communication with the Arduino by default, if you want to commune with the Arduino and need two 4.7 K of the IIC pin pull-up resistor connected to the VIN pin, these contents will be introduced in the back of the chapter.

Functional assignments

Before starting this project, I thought about some simple features:
• Heart rate data and blood oxygen data were collected
• Heart rate and blood oxygen data are displayed through an LCD screen
These are the only two features, but if we want to implement it, we need to do more thinking:
• What master MCU is used?
• What kind of LCD display?
As we mentioned earlier, we use Arduino for the MCU, but this is an LCD Arduino project, so we need to choose the appropriate LCD display module. I plan to use the LCD display screen with a serial port. I have a STONE STVI070WT-01 displayer here, but if Arduino needs to communicate with it, MAX3232 is needed to do the level conversion.
Then the basic electronic materials are determined as follows:
  1. Arduino Mini Pro development board
  2. MAX30100 heart rate and blood oxygen sensor module
  3. STONE STVI070WT-01 LCD serial port display module
  4. MAX3232 module

Hardware Introduction

MAX30100

The MAX30100 is an integrated pulse oximetry and heart rate monitor sensor solution. It combines two LEDs, a photodetector, optimized optics, and low-noise analog signal processing to detect pulse oximetry and heart-rate signals. The MAX30100 operates from 1.8V and 3.3V power supplies and can be powered down through software with negligible standby current, permitting the power supply to remain connected at all times.

Applications

● Wearable Devices
● Fitness Assistant Devices
● Medical Monitoring Devices

Benefits and Features

1、Complete Pulse Oximeter and Heart-Rate SensorSolution Simplifies Design
• Integrated LEDs, Photo Sensor, and high-Performance Analog Front -End
• Tiny 5.6mm x 2.8mm x 1.2mm 14-Pin OpticallyEnhanced System-in-Package
2、Ultra-Low-Power Operation Increases Battery Life for wearable Devices
• Programmable Sample Rate and LED Current for Power Savings
• Ultra-Low Shutdown Current (0.7µA, typ)
3、Advanced Functionality Improves Measurement Performance
• High SNR Provides Robust Motion Artifact Resilience
• Integrated Ambient Light Cancellation
• High Sample Rate Capability
• Fast Data Output Capability

Detection Principle


https://preview.redd.it/254ou0pq20a51.jpg?width=817&format=pjpg&auto=webp&s=2d3287e1973b328412e14c6e56f74e6f5975153e
Just press your finger against the sensor to estimate pulse oxygen saturation (SpO2) and pulse (equivalent to heartbeat).
The pulse oximeter (oximeter) is a mini-spectrometer that USES the principles of different red cell absorption spectra to analyze the oxygen saturation of the blood. This real-time and rapid measurement method is also widely used in many clinical references.
I will not introduce the MAX30100 too much, because these materials are available on the Internet. Interested friends can look up the information of this heart rate test module on the Internet, and have a deeper understanding of its detection principle.

Introduction to the STVI070WT-01 displayer

In this project, I will use the STONE STVI070WT-01 to display the heart rate and blood oxygen data.
The driver chip has been integrated inside the display screen, and there is software for users to use. Users only need to add buttons, text boxes, and other logic through the designed UI pictures, and then generate configuration files and download them into the display screen to run.
The display of STVI070WT-01 communicates with MCU through the UART RS232 signal, which means that we need to add a MAX3232 chip to convert the RS232 signal into a TTL signal so that we can communicate with Arduino MCU.

https://preview.redd.it/kyyv3hou20a51.jpg?width=749&format=pjpg&auto=webp&s=512b7285eb763e518a85d0b172dabc08b15cab6a
If you are not sure how to use the MAX3232, please refer to the following pictures:

https://preview.redd.it/5laiqsxw20a51.jpg?width=653&format=pjpg&auto=webp&s=126fb57d5171d942046277896e1552995df0ce13
If you think the level conversion is too troublesome, you can choose other types of displayers of STONE Tech, some of which can directly output uart-TTL signal.
The official website has detailed information and introduction:
https://www.stoneitech.com/
If you need video tutorials and tutorials to use, you can also find it on the official website.

https://preview.redd.it/0rkfwxk530a51.jpg?width=867&format=pjpg&auto=webp&s=32803906927fff48bb8fbc1b0a7c073cfe54c5e5

Development steps

Three steps of STONE display screen development:
• Design the display logic and button logic with STONE TOOL software, and download the design file to the display module.
• MCU communicates with the STONE LCD display module through the serial port.
• With the data obtained in step 2, the MCU does other actions.

STONE TOOL software installation

Download the latest version of the STONE TOOL software (currently TOOL2019) from the website, and install it.
After the software is installed, the following interface will be opened:

https://preview.redd.it/evuct2w630a51.jpg?width=848&format=pjpg&auto=webp&s=201d40fdb81e2c4fd229992daf15501f2cb177a0
Click the "File" button in the upper left corner to create a new project, which we will discuss later.

LCD Arduino

Arduino is an open-source electronic prototype platform that is easy to use and easy to use. It includes the hardware part (various development boards that conform to the Arduino specification) and the software part (Arduino IDE and related development kits).
The hardware part (or development board) consists of a microcontroller (MCU), Flash memory (Flash), and a set of universal input/output interfaces (GPIO), which you can think of as a microcomputer motherboard.
The software part is mainly composed of Arduino IDE on PC, related board-level support package (BSP) and rich third-party function library. With the Arduino IDE, you can easily download the BSP associated with your development board and the libraries you need to write your programs.
Arduino is an open-source platform. So far, there have been many models and many derived controllers, including Arduino Uno, Arduino Nano, Arduino Yun and so on. In addition, the Arduino IDE now not only supports the Arduino series development boards but also adds support for popular development boards such as Intel Galileo and NodeMCU by introducing BSP.
Arduino senses the environment through a variety of sensors, controlling lights, motors and other devices to feedback and influence the environment. The microcontroller on the board can be programmed with an Arduino programming language, compiled into binaries, and burned into the microcontroller. Programming for Arduino is implemented with the Arduino programming language (based on Wiring) and the Arduino development environment (based on Processing). Arduino-based projects can contain Arduino only, as well as Arduino and other software running on PC, and they communicate with each other (such as Flash, Processing, MaxMSP).

HMI for Arduino serial display TFT LCD project development environment

The Arduino development environment is the Arduino IDE, which can be downloaded from the Internet.
Log into the official website of Arduino and download the software
https://www.arduino.cc/en/Main/Software?setlang=cn
After installing the Arduino IDE, the following interface will appear when you open the software:

https://preview.redd.it/2ajmkke830a51.jpg?width=567&format=pjpg&auto=webp&s=56dc9dd01c98b231c782ef94d24a9f620c4897b3
The Arduino IDE creates two functions by default: the setup function and the loop function.
There are many Arduino introductions on the Internet. If you don't understand something, you can go to the Internet to find it.

LCD Arduino Project implementation process

hardware connection

To ensure that the next step in writing code goes smoothly, we must first determine the reliability of the hardware connection.
Only four pieces of hardware were used in this project:
  1. Arduino Mini pro-development board
  2. STONE STVI070WT-01 TFT-LCD display screen
  3. MAX30100 heart rate and blood oxygen sensor
  4. MAX3232 (rs232-> TTL)
The Arduino Mini Pro development board and STVI070WT-01 TFT-LCD display screen are connected through UART, which requires level conversion through MAX3232, and then the Arduino Mini Pro development board and MAX30100 module are connected through IIC interface. After thinking clearly, we can draw the following wiring picture:

https://preview.redd.it/w2e5c9ha30a51.jpg?width=769&format=pjpg&auto=webp&s=95129db838d6c358e986c88a4d1348f4783cd0ab
https://preview.redd.it/eom4wiia30a51.jpg?width=1091&format=pjpg&auto=webp&s=ff56c3afaf063d7785a5b85ba283532be0dd896e
Make sure there are no errors in the hardware connection and proceed to the next step.

STONE TFT LCD user interface design

First of all, we need to design a UI display image, which can be designed by PhotoShop or other image design tools. After designing the UI display image, save the image in JPG format.
Open the software STONE TOOL 2019 and create a new project:

https://preview.redd.it/sqjii2mc30a51.jpg?width=1004&format=pjpg&auto=webp&s=12f0a87d6c2ca8decaff241d5a0b50a3a1aece89
https://preview.redd.it/4ta8cdlc30a51.jpg?width=871&format=pjpg&auto=webp&s=b31ac5e612a2c809e29f63974a04ba25bff83788
Remove the image that was loaded by default in the new project, and add the UI image that we designed.
Add the text display component, design the display digit and decimal point, get the storage location of the text display component in the displayer.
The effect is as follows:

https://preview.redd.it/2mfqapoe30a51.jpg?width=1335&format=pjpg&auto=webp&s=aacfa0fde88defacd127ea9d9d27ab006ab618dd
Text display component address:
• Connection sta : 0x0008
• Heart rate : 0x0001
• Blood oxygen : 0x0005
The main contents of the UI interface are as follows:
• Connection status
• Heart rate display
• Blood oxygen showed

Generate configuration file

Once the UI design is complete, the configuration file can be generated and downloaded to the STVI070WT-01 displaye.

First, perform step 1, then insert the USB flash drive into the computer, and the disk symbol will be displayed. Then click "Download to u-disk" to Download the configuration file to the USB flash drive, and then insert the USB flash drive into STVI070WT-01 to complete the upgrade.

MAX30100

MAX30100 communicates via IIC. Its working principle is that the ADC value of heart rate can be obtained through infrared led irradiation. The MAX30100 register can be divided into five categories: state register, FIFO, control register, temperature register, and ID register. The temperature register reads the temperature value of the chip to correct the deviation caused by the temperature. The ID register can read the chip's ID number.

https://preview.redd.it/221fq8vg30a51.jpg?width=848&format=pjpg&auto=webp&s=43e93284ac35cf1944a77d79ff9a2f662e540c7e

MAX30100 is connected with the Arduino Mini Pro development board through the IIC communication interface. Because there are ready-made MAX30100 library files in the Arduino IDE, we can read the heart rate and blood oxygen data without studying the registers of MAX30100.
For those who are interested in exploring the MAX30100 register, see the MAX30100 Datasheet.

Modify the MAX30100 IIC pull-up resistor

It should be noted that the 4.7k pull-up resistance of the IIC pin of MAX30100 module is connected to 1.8v, which is not a problem in theory. However, the communication logic level of the Arduino IIC pin is 5V, so it cannot communicate with Arduino without changing the hardware of the MAX30100 module.Direct communication is possible if the MCU is STM32 or another 3.3v logic level MCU.
Therefore, the following changes need to be made:

https://preview.redd.it/jti57usl30a51.jpg?width=521&format=pjpg&auto=webp&s=c56b1b1a8294d60a8f9e931e411305f68c5c5559
Remove the three 4.7k resistors marked in the picture with an electric soldering iron. Then weld two resistors of 4.7k at the pins of SDA and SCL to VIN, so that we can communicate with Arduino.

Arduino serial display LCD

Open the Arduino IDE and find the following buttons:

https://preview.redd.it/990d3bdp30a51.jpg?width=853&format=pjpg&auto=webp&s=24136c385601b69d5afc67842358b102373277ef
Search for "MAX30100" to find two libraries for MAX30100, then click download and install.

https://preview.redd.it/4n167pbv30a51.jpg?width=933&format=pjpg&auto=webp&s=cef50833667bae3f30ac94f5a48b43795b779845
After the installation, you can find the Demo of MAX30100 in the LIB library folder of LCD Arduino:

https://preview.redd.it/rn05xgvw30a51.jpg?width=911&format=pjpg&auto=webp&s=3709bc7c5be36ebdd14c01cb0b7c1933953425b0
Double-click the file to open it.

https://preview.redd.it/q6fqylky30a51.jpg?width=819&format=pjpg&auto=webp&s=8073917be374a72bef2977b4b11ccb2b56fa944e
This Demo can be directly tested. If the hardware connection is ok, you can download the code compilation into the Arduino development board and see the data of MAX30100 in the serial debugging tool.
The complete code is as follows: /*
Arduino-MAX30100 oximetry / heart rate integrated sensor library
Copyright (C) 2016 OXullo Intersecans
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see .
*/
#include
#include "MAX30100_PulseOximeter.h"
#define REPORTING_PERIOD_MS 1000
// PulseOximeter is the higher level interface to the sensor
// it offers:
// * beat detection reporting
// * heart rate calculation
// * SpO2 (oxidation level) calculation
PulseOximeter pox;
uint32_t tsLastReport = 0;
// Callback (registered below) fired when a pulse is detected
void onBeatDetected()
{
Serial.println("Beat!");
}
void setup()
{
Serial.begin(115200);
Serial.print("Initializing pulse oximeter..");
// Initialize the PulseOximeter instance
// Failures are generally due to an improper I2C wiring, missing power supply
// or wrong target chip
if (!pox.begin()) {
Serial.println("FAILED");
for(;;);
} else {
Serial.println("SUCCESS");
}
// The default current for the IR LED is 50mA and it could be changed
// by uncommenting the following line. Check MAX30100_Registers.h for all the
// available options.
// pox.setIRLedCurrent(MAX30100_LED_CURR_7_6MA);
// Register a callback for the beat detection
pox.setOnBeatDetectedCallback(onBeatDetected);
}
void loop()
{
// Make sure to call update as fast as possible
pox.update();
// Asynchronously dump heart rate and oxidation levels to the serial
// For both, a value of 0 means "invalid"
if (millis() - tsLastReport > REPORTING_PERIOD_MS) {
Serial.print("Heart rate:");
Serial.print(pox.getHeartRate());
Serial.print("bpm / SpO2:");
Serial.print(pox.getSpO2());
Serial.println("%");
tsLastReport = millis();
}
}
📷
This code is very simple, I believe you can understand it at a glance. I have to say that the modular programming of Arduino is very convenient, and I don't even need to understand how the driver code of Uart and IIC is implemented.
Of course, the above code is an official Demo, and I still need to make some changes to display the data to STONE's displayer.

Display data to the STONE display through Arduino LCD

First, we need to get the address of the component that displays the heart rate and blood oxygen data in STONE's displayer:
In my project, the address is as follows:
Heart rate display component address: 0x0001
Address of blood oxygen display module: 0x0005
Sensor connection status address: 0x0008
If you need to change the display content in the corresponding space, you can change the display content by sending data to the corresponding address of the display screen through the serial port of Arduino.
The modified code is as follows:
/*
Arduino-MAX30100 oximetry / heart rate integrated sensor library
Copyright (C) 2016 OXullo Intersecans
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see .
*/
#include
#include "MAX30100_PulseOximeter.h"
#define REPORTING_PERIOD_MS 1000
#define Heart_dis_addr 0x01
#define Sop2_dis_addr 0x05
#define connect_sta_addr 0x08
unsigned char heart_rate_send[8]= {0xA5, 0x5A, 0x05, 0x82,\
0x00, Heart_dis_addr, 0x00, 0x00};
unsigned char Sop2_send[8]= {0xA5, 0x5A, 0x05, 0x82, 0x00, \
Sop2_dis_addr, 0x00, 0x00};
unsigned char connect_sta_send[8]={0xA5, 0x5A, 0x05, 0x82, 0x00, \
connect_sta_addr,0x00, 0x00};
// PulseOximeter is the higher level interface to the sensor
// it offers:
// * beat detection reporting
// * heart rate calculation
// * SpO2 (oxidation level) calculation
PulseOximeter pox;
uint32_t tsLastReport = 0;
// Callback (registered below) fired when a pulse is detected
void onBeatDetected()
{
// Serial.println("Beat!");
}
void setup()
{
Serial.begin(115200);
// Serial.print("Initializing pulse oximeter..");
// Initialize the PulseOximeter instance
// Failures are generally due to an improper I2C wiring, missing power supply
// or wrong target chip
if (!pox.begin()) {
// Serial.println("FAILED");
// connect_sta_send[7]=0x00;
// Serial.write(connect_sta_send,8);
for(;;);
} else {
connect_sta_send[7]=0x01;
Serial.write(connect_sta_send,8);
// Serial.println("SUCCESS");
}
// The default current for the IR LED is 50mA and it could be changed
// by uncommenting the following line. Check MAX30100_Registers.h for all the
// available options.
pox.setIRLedCurrent(MAX30100_LED_CURR_7_6MA);
// Register a callback for the beat detection
pox.setOnBeatDetectedCallback(onBeatDetected);
}
void loop()
{
// Make sure to call update as fast as possible
pox.update();
// Asynchronously dump heart rate and oxidation levels to the serial
// For both, a value of 0 means "invalid"
if (millis() - tsLastReport > REPORTING_PERIOD_MS) {
// Serial.print("Heart rate:");
// Serial.print(pox.getHeartRate());
// Serial.print("bpm / SpO2:");
// Serial.print(pox.getSpO2());
// Serial.println("%");
heart_rate_send[7]=(uint32_t)pox.getHeartRate();
Serial.write(heart_rate_send,8);
Sop2_send[7]=pox.getSpO2();
Serial.write(Sop2_send,8);
tsLastReport = millis();
}
}
Compile the code, download it to the Arduino serial display LCD development board, and you're ready to start testing.
We can see that when the fingers leave the MAX30100, the heart rate and blood oxygen display 0. Place your finger on the MAX30100 collector to see your heart rate and blood oxygen levels in real-time.

LCD Arduino project effect can be seen in the following picture:


https://preview.redd.it/k9u0jtg040a51.jpg?width=510&format=pjpg&auto=webp&s=1e9994109a072807a802eb1179b874f727aeff5a
https://preview.redd.it/0ow2lfg040a51.jpg?width=576&format=pjpg&auto=webp&s=b0f5f6ac073894c8b0c033549fce79fac1c90bc3
submitted by Tamesliu to arduino [link] [comments]

LCD Arduino + STONE HMI + Display Heart Rate

LCD Arduino project brief introduction

Some time ago, I found a heart rate sensor module MAX30100 in shopping online. This module can collect blood oxygen and heart rate data of users, which is also simple and convenient to use.
According to the data, I found that there are libraries of MAX30100 in the Arduino library files. That is to say, if I use the communication between LCD Arduino and MAX30100, I can directly call the Arduino library files without having to rewrite the driver files. This is a good thing, so I bought the module of MAX30100.
I decided to use Arduino to verify the heart rate and blood oxygen collection function of MAX30100. With STONE TFT LCD screen for monitoring blood pressure.

https://preview.redd.it/fbm2i8e32o251.jpg?width=328&format=pjpg&auto=webp&s=20329c7187f3fdf628106e923453fdf588fe69ab
Note: this module by default only with 3.3 V level MCU communications, because it defaults to using IIC pin pull up the resistance of 4.7 K to 1.8 V, so there is no communication with the Arduino by default, if you want to commune with the Arduino and need two 4.7 K of the IIC pin pull-up resistor connected to the VIN pin, these contents will be introduced in the back of the chapter.

Functional assignments

Before starting this project, I thought about some simple features:
• Heart rate data and blood oxygen data were collected
• Heart rate and blood oxygen data are displayed through an LCD screen
These are the only two features, but if we want to implement it, we need to do more thinking:
• What master MCU is used?
• What kind of LCD display?
As we mentioned earlier, we use Arduino for the MCU, but this is an LCD Arduino project, so we need to choose the appropriate LCD display module. I plan to use the LCD display screen with a serial port. I have a STONE STVI070WT-01 displayer here, but if Arduino needs to communicate with it, MAX3232 is needed to do the level conversion.
Then the basic electronic materials are determined as follows:
  1. Arduino Mini Pro development board
  2. MAX30100 heart rate and blood oxygen sensor module
  3. STONE STVI070WT-01 LCD serial port display module
  4. MAX3232 module

Hardware Introduction

MAX30100

The MAX30100 is an integrated pulse oximetry and heart rate monitor sensor solution. It combines two LEDs, a photodetector, optimized optics, and low-noise analog signal processing to detect pulse oximetry and heart-rate signals. The MAX30100 operates from 1.8V and 3.3V power supplies and can be powered down through software with negligible standby current, permitting the power supply to remain connected at all times.

Applications

● Wearable Devices
● Fitness Assistant Devices
● Medical Monitoring Devices

Benefits and Features

1、Complete Pulse Oximeter and Heart-Rate SensorSolution Simplifies Design
• Integrated LEDs, Photo Sensor, and high-Performance Analog Front -End
• Tiny 5.6mm x 2.8mm x 1.2mm 14-Pin OpticallyEnhanced System-in-Package
2、Ultra-Low-Power Operation Increases Battery Life for wearable Devices
• Programmable Sample Rate and LED Current for Power Savings
• Ultra-Low Shutdown Current (0.7µA, typ)
3、Advanced Functionality Improves Measurement Performance
• High SNR Provides Robust Motion Artifact Resilience
• Integrated Ambient Light Cancellation
• High Sample Rate Capability
• Fast Data Output Capability

Detection Principle


https://preview.redd.it/kgu72wk52o251.jpg?width=817&format=pjpg&auto=webp&s=0b44a5b4b476c50c1cbd311f048313777d06cabb
Just press your finger against the sensor to estimate pulse oxygen saturation (SpO2) and pulse (equivalent to heartbeat).
The pulse oximeter (oximeter) is a mini-spectrometer that USES the principles of different red cell absorption spectra to analyze the oxygen saturation of the blood. This real-time and rapid measurement method is also widely used in many clinical references.
I will not introduce the MAX30100 too much, because these materials are available on the Internet. Interested friends can look up the information of this heart rate test module on the Internet, and have a deeper understanding of its detection principle.

Introduction to the STVI070WT-01 displayer

In this project, I will use the STONE STVI070WT-01 to display the heart rate and blood oxygen data.
The driver chip has been integrated inside the display screen, and there is software for users to use. Users only need to add buttons, text boxes and other logic through the designed UI pictures, and then generate configuration files and download them into the display screen to run.
The display of STVI070WT-01 communicates with MCU through the UART RS232 signal, which means that we need to add a MAX3232 chip to convert the RS232 signal into a TTL signal so that we can communicate with Arduino MCU.

https://preview.redd.it/oacuof082o251.jpg?width=749&format=pjpg&auto=webp&s=d1427adf34689c8a433a2af71c494f7698e4baf8
If you are not sure how to use the MAX3232, please refer to the following pictures:

https://preview.redd.it/u39qtog92o251.jpg?width=653&format=pjpg&auto=webp&s=04cf458bcebcd27ba09f36903e20e7ebe1aaa6f9
If you think the level conversion is too troublesome, you can choose other types of displayers of STONE Tech, some of which can directly output uart-TTL signal.
The official website has detailed information and introduction:
https://www.stoneitech.com/
If you need video tutorials and tutorials to use, you can also find it on the official website.

Development steps

Three steps of STONE display screen development:
• Design the display logic and button logic with STONE TOOL software, and download the design file to the display module.
• MCU communicates with the STONE LCD display module through the serial port.
• With the data obtained in step 2, the MCU does other actions.

STONE TOOL software installation

Download the latest version of the STONE TOOL software (currently TOOL2019) from the website, and install it.
After the software is installed, the following interface will be opened:

https://preview.redd.it/ryc7qjkd2o251.jpg?width=848&format=pjpg&auto=webp&s=72f674b6a2b653562a31735f103aecf2df16199d
Click the "File" button in the upper left corner to create a new project, which we will discuss later.

LCD Arduino

Arduino is an open-source electronic prototype platform that is easy to use and easy to use. It includes the hardware part (various development boards that conform to the Arduino specification) and the software part (Arduino IDE and related development kits).
The hardware part (or development board) consists of a microcontroller (MCU), Flash memory (Flash), and a set of universal input/output interfaces (GPIO), which you can think of as a microcomputer motherboard.
The software part is mainly composed of Arduino IDE on PC, related board-level support package (BSP) and rich third-party function library. With the Arduino IDE, you can easily download the BSP associated with your development board and the libraries you need to write your programs.
Arduino is an open-source platform. So far, there have been many models and many derived controllers, including Arduino Uno, Arduino Nano, Arduino Yun and so on. In addition, the Arduino IDE now not only supports the Arduino series development boards but also adds support for popular development boards such as Intel Galileo and NodeMCU by introducing BSP.
Arduino senses the environment through a variety of sensors, controlling lights, motors and other devices to feedback and influence the environment. The microcontroller on the board can be programmed with an Arduino programming language, compiled into binaries, and burned into the microcontroller. Programming for Arduino is implemented with the Arduino programming language (based on Wiring) and the Arduino development environment (based on Processing). Arduino-based projects can contain Arduino only, as well as Arduino and other software running on PC, and they communicate with each other (such as Flash, Processing, MaxMSP).

HMI for Arduino serial display TFT LCD project development environment

The Arduino development environment is the Arduino IDE, which can be downloaded from the Internet.
Log into the official website of Arduino and download the software
https://www.arduino.cc/en/Main/Software?setlang=cn
After installing the Arduino IDE, the following interface will appear when you open the software:

https://preview.redd.it/2fcfnrkg2o251.jpg?width=567&format=pjpg&auto=webp&s=9b6664d15fb99c31ee91c49be56d9eb9e17e04de
The Arduino IDE creates two functions by default: the setup function and the loop function.
There are many Arduino introductions on the Internet. If you don't understand something, you can go to the Internet to find it.

LCD Arduino Project implementation process

hardware connection

To ensure that the next step in writing code goes smoothly, we must first determine the reliability of the hardware connection.
Only four pieces of hardware were used in this project:
  1. Arduino Mini pro development board
  2. STONE STVI070WT-01 tft-lcd display screen
  3. MAX30100 heart rate and blood oxygen sensor
  4. MAX3232 (rs232-> TTL)
The Arduino Mini Pro development board and STVI070WT tft-lcd display screen are connected through UART, which requires level conversion through MAX3232, and then the Arduino Mini Pro development board and MAX30100 module are connected through IIC interface.After thinking clearly, we can draw the following wiring picture:

https://preview.redd.it/xkpv7bxi2o251.jpg?width=769&format=pjpg&auto=webp&s=b3658c7c455ba97c6f3a961e34ed020059201b8b

https://preview.redd.it/zobnoatl2o251.jpg?width=1091&format=pjpg&auto=webp&s=2263d1d5a6d208b6e9c1110334971a1d34ed742c
Make sure there are no errors in the hardware connection and proceed to the next step.

STONE TFT LCD user interface design

First of all, we need to design a UI display image, which can be designed by PhotoShop or other image design tools. After designing the UI display image, save the image in JPG format.
Open the software STONE TOOL 2019 and create a new project:

https://preview.redd.it/ou27uc4o2o251.jpg?width=1004&format=pjpg&auto=webp&s=e559c55a3d4fb014fc35dd94bca4d7a52938c87f

https://preview.redd.it/j7mkexnp2o251.jpg?width=871&format=pjpg&auto=webp&s=eb80865fd5efe45a5b015790f0fd0c02f07ca069
Remove the image that was loaded by default in the new project, and add the UI image that we designed.
Add the text display component, design the display digit and decimal point, get the storage location of the text display component in the displayer.
The effect is as follows:

https://preview.redd.it/y7333lor2o251.jpg?width=1335&format=pjpg&auto=webp&s=501576a9d57e92b1435bc25406612a0f758038a5
Text display component address:
• Connection sta : 0x0008
• Heart rate : 0x0001
• Blood oxygen : 0x0005
The main contents of the UI interface are as follows:
• Connection status
• Heart rate display
• Blood oxygen showed

Generate configuration file

Once the UI design is complete, the configuration file can be generated and downloaded to the STVI070WT-01 displaye.

https://preview.redd.it/c94grplt2o251.jpg?width=606&format=pjpg&auto=webp&s=ab0a7306791341599fbb874c63638f1066e5f1d9
First, perform step 1, then insert the USB flash drive into the computer, and the disk symbol will be displayed. Then click "Download to u-disk" to Download the configuration file to the USB flash drive, and then insert the USB flash drive into STVI070WT-01 to complete the upgrade.

MAX30100

MAX30100 communicates via IIC. Its working principle is that the ADC value of heart rate can be obtained through infrared led irradiation. The MAX30100 register can be divided into five categories: state register, FIFO, control register, temperature register, and ID register. The temperature register reads the temperature value of the chip to correct the deviation caused by the temperature. The ID register can read the chip's ID number.

https://preview.redd.it/dfomjb1z2o251.jpg?width=848&format=pjpg&auto=webp&s=911b174be98448c64002c1a24fa6528ce56ae3b7
MAX30100 is connected with the Arduino Mini Pro development board through the IIC communication interface. Because there are ready-made MAX30100 library files in the Arduino IDE, we can read the heart rate and blood oxygen data without studying the registers of MAX30100.
For those who are interested in exploring the MAX30100 register, see the MAX30100 Datasheet.

Modify the MAX30100 IIC pull-up resistor

It should be noted that the 4.7k pull-up resistance of the IIC pin of MAX30100 module is connected to 1.8v, which is not a problem in theory. However, the communication logic level of the Arduino IIC pin is 5V, so it cannot communicate with Arduino without changing the hardware of the MAX30100 module.Direct communication is possible if the MCU is STM32 or another 3.3v logic level MCU.
Therefore, the following changes need to be made:

https://preview.redd.it/l5cimq013o251.jpg?width=521&format=pjpg&auto=webp&s=9fc29401ed402b9bf623c4f8e474336c8050fae8
Remove the three 4.7k resistors marked in the picture with an electric soldering iron. Then weld two resistors of 4.7k at the pins of SDA and SCL to VIN, so that we can communicate with Arduino.

Arduino serial display LCD

Open the Arduino IDE and find the following buttons:

https://preview.redd.it/w9mska373o251.jpg?width=853&format=pjpg&auto=webp&s=fe0ee068c64ce109028dab4f5898335ded02c82e
Search for "MAX30100" to find two libraries for MAX30100, then click download and install.

https://preview.redd.it/pqlihp9a3o251.jpg?width=933&format=pjpg&auto=webp&s=493965c54d1cc755a0dd2ac98ad6100cf7c93948
After the installation, you can find the Demo of MAX30100 in the LIB library folder of LCD Arduino:

https://preview.redd.it/srk2g83c3o251.jpg?width=911&format=pjpg&auto=webp&s=da696328a0a198c0ee41a17a7811024d36a153ea
Double-click the file to open it.

https://preview.redd.it/lc8z3gtd3o251.jpg?width=819&format=pjpg&auto=webp&s=bbac5eb529e4279792c899d738ebdb0fa9263c54
This Demo can be directly tested. If the hardware connection is ok, you can download the code compilation into the Arduibo development board and see the data of MAX30100 in the serial debugging tool.
The complete code is as follows:
/*
Arduino-MAX30100 oximetry / heart rate integrated sensor library
Copyright (C) 2016 OXullo Intersecans
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see .
*/
#include
#include "MAX30100_PulseOximeter.h"
#define REPORTING_PERIOD_MS 1000
// PulseOximeter is the higher level interface to the sensor
// it offers:
// * beat detection reporting
// * heart rate calculation
// * SpO2 (oxidation level) calculation
PulseOximeter pox;
uint32_t tsLastReport = 0;
// Callback (registered below) fired when a pulse is detected
void onBeatDetected()
{
Serial.println("Beat!");
}
void setup()
{
Serial.begin(115200);
Serial.print("Initializing pulse oximeter..");
// Initialize the PulseOximeter instance
// Failures are generally due to an improper I2C wiring, missing power supply
// or wrong target chip
if (!pox.begin()) {
Serial.println("FAILED");
for(;;);
} else {
Serial.println("SUCCESS");
}
// The default current for the IR LED is 50mA and it could be changed
// by uncommenting the following line. Check MAX30100_Registers.h for all the
// available options.
// pox.setIRLedCurrent(MAX30100_LED_CURR_7_6MA);
// Register a callback for the beat detection
pox.setOnBeatDetectedCallback(onBeatDetected);
}
void loop()
{
// Make sure to call update as fast as possible
pox.update();
// Asynchronously dump heart rate and oxidation levels to the serial
// For both, a value of 0 means "invalid"
if (millis() - tsLastReport > REPORTING_PERIOD_MS) {
Serial.print("Heart rate:");
Serial.print(pox.getHeartRate());
Serial.print("bpm / SpO2:");
Serial.print(pox.getSpO2());
Serial.println("%");
tsLastReport = millis();
}
}


https://preview.redd.it/nyuyl4zl3o251.jpg?width=552&format=pjpg&auto=webp&s=58e05bc67a250de6f7b24060290d8a0703624e30
This code is very simple, I believe you can understand it at a glance. I have to say that the modular programming of Arduino is very convenient, and I don't even need to understand how the driver code of Uart and IIC is implemented.
Of course, the above code is an official Demo, and I still need to make some changes to display the data to STONE's displayer.

Display data to the STONE display through Arduino LCD

First, we need to get the address of the component that displays the heart rate and blood oxygen data in STONE's displayer:
In my project, the address is as follows:
Heart rate display component address: 0x0001
Address of blood oxygen display module: 0x0005
Sensor connection status address: 0x0008
If you need to change the display content in the corresponding space, you can change the display content by sending data to the corresponding address of the display screen through the serial port of Arduino.
The modified code is as follows:
/*
Arduino-MAX30100 oximetry / heart rate integrated sensor library
Copyright (C) 2016 OXullo Intersecans
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see .
*/
#include
#include "MAX30100_PulseOximeter.h"
#define REPORTING_PERIOD_MS 1000
#define Heart_dis_addr 0x01
#define Sop2_dis_addr 0x05
#define connect_sta_addr 0x08
unsigned char heart_rate_send[8]= {0xA5, 0x5A, 0x05, 0x82,\
0x00, Heart_dis_addr, 0x00, 0x00};
unsigned char Sop2_send[8]= {0xA5, 0x5A, 0x05, 0x82, 0x00, \
Sop2_dis_addr, 0x00, 0x00};
unsigned char connect_sta_send[8]={0xA5, 0x5A, 0x05, 0x82, 0x00, \
connect_sta_addr,0x00, 0x00};
// PulseOximeter is the higher level interface to the sensor
// it offers:
// * beat detection reporting
// * heart rate calculation
// * SpO2 (oxidation level) calculation
PulseOximeter pox;
uint32_t tsLastReport = 0;
// Callback (registered below) fired when a pulse is detected
void onBeatDetected()
{
// Serial.println("Beat!");
}
void setup()
{
Serial.begin(115200);
// Serial.print("Initializing pulse oximeter..");
// Initialize the PulseOximeter instance
// Failures are generally due to an improper I2C wiring, missing power supply
// or wrong target chip
if (!pox.begin()) {
// Serial.println("FAILED");
// connect_sta_send[7]=0x00;
// Serial.write(connect_sta_send,8);
for(;;);
} else {
connect_sta_send[7]=0x01;
Serial.write(connect_sta_send,8);
// Serial.println("SUCCESS");
}
// The default current for the IR LED is 50mA and it could be changed
// by uncommenting the following line. Check MAX30100_Registers.h for all the
// available options.
pox.setIRLedCurrent(MAX30100_LED_CURR_7_6MA);
// Register a callback for the beat detection
pox.setOnBeatDetectedCallback(onBeatDetected);
}
void loop()
{
// Make sure to call update as fast as possible
pox.update();
// Asynchronously dump heart rate and oxidation levels to the serial
// For both, a value of 0 means "invalid"
if (millis() - tsLastReport > REPORTING_PERIOD_MS) {
// Serial.print("Heart rate:");
// Serial.print(pox.getHeartRate());
// Serial.print("bpm / SpO2:");
// Serial.print(pox.getSpO2());
// Serial.println("%");
heart_rate_send[7]=(uint32_t)pox.getHeartRate();
Serial.write(heart_rate_send,8);
Sop2_send[7]=pox.getSpO2();
Serial.write(Sop2_send,8);
tsLastReport = millis();
}
}

Compile the code, download it to the Arduino serial display LCD development board, and you're ready to start testing.
We can see that when the fingers leave the MAX30100, the heart rate and blood oxygen display 0. Place your finger on the MAX30100 collector to see your heart rate and blood oxygen levels in real-time.

LCD Arduino project effect can be seen in the following picture:


https://preview.redd.it/lf120a5s3o251.jpg?width=510&format=pjpg&auto=webp&s=d705a9e10bac1758afc554036a31748c5f73d255
submitted by woodkiki to ArduinoProjects [link] [comments]

Vault 7 - CIA Hacking Tools Revealed

Vault 7 - CIA Hacking Tools Revealed
March 07, 2017
from Wikileaks Website


https://preview.redd.it/9ufj63xnfdb41.jpg?width=500&format=pjpg&auto=webp&s=46bbc937f4f060bad1eaac3e0dce732e3d8346ee

Press Release
Today, Tuesday 7 March 2017, WikiLeaks begins its new series of leaks on the U.S. Central Intelligence Agency.
Code-named "Vault 7" by WikiLeaks, it is the largest ever publication of confidential documents on the agency.
The first full part of the series, "Year Zero", comprises 8,761 documents and files from an isolated, high-security network situated inside the CIA's Center for Cyber Intelligence (below image) in Langley, Virgina.
It follows an introductory disclosure last month of CIA targeting French political parties and candidates in the lead up to the 2012 presidential election.
Recently, the CIA lost control of the majority of its hacking arsenal including,
  1. malware
  2. viruses
  3. trojans
  4. weaponized "zero day" exploits
  5. malware remote control systems

...and associated documentation.
This extraordinary collection, which amounts to more than several hundred million lines of code, gives its possessor the entire hacking capacity of the CIA.
The archive appears to have been circulated among former U.S. government hackers and contractors in an unauthorized manner, one of whom has provided WikiLeaks with portions of the archive.
"Year Zero" introduces the scope and direction of the CIA's global covert hacking program, its malware arsenal and dozens of "zero day" weaponized exploits against a wide range of U.S. and European company products, include,

  1. Apple's iPhone
  2. Google's Android
  3. Microsoft's Windows
  4. Samsung TVs,

...which are turned into covert microphones.
Since 2001 the CIA has gained political and budgetary preeminence over the U.S. National Security Agency (NSA).
The CIA found itself building not just its now infamous drone fleet, but a very different type of covert, globe-spanning force - its own substantial fleet of hackers.
The agency's hacking division freed it from having to disclose its often controversial operations to the NSA (its primary bureaucratic rival) in order to draw on the NSA's hacking capacities.
By the end of 2016, the CIA's hacking division, which formally falls under the agency's Center for Cyber Intelligence (CCI - below image), had over 5000 registered users and had produced more than a thousand,
hacking systems trojans viruses,
...and other "weaponized" malware.


https://preview.redd.it/3jsojkqxfdb41.jpg?width=366&format=pjpg&auto=webp&s=e92eafbb113ab3e972045cc242dde0f0dd511e96

Such is the scale of the CIA's undertaking that by 2016, its hackers had utilized more codes than those used to run Facebook.
The CIA had created, in effect, its "own NSA" with even less accountability and without publicly answering the question as to whether such a massive budgetary spend on duplicating the capacities of a rival agency could be justified.
In a statement to WikiLeaks the source details policy questions that they say urgently need to be debated in public, including whether the CIA's hacking capabilities exceed its mandated powers and the problem of public oversight of the agency.
The source wishes to initiate a public debate about the security, creation, use, proliferation and democratic control of cyberweapons.
Once a single cyber 'weapon' is 'loose' it can spread around the world in seconds, to be used by rival states, cyber mafia and teenage hackers alike.

Julian Assange, WikiLeaks editor stated that,
"There is an extreme proliferation risk in the development of cyber 'weapons'.
Comparisons can be drawn between the uncontrolled proliferation of such 'weapons', which results from the inability to contain them combined with their high market value, and the global arms trade.
But the significance of 'Year Zero' goes well beyond the choice between cyberwar and cyberpeace. The disclosure is also exceptional from a political, legal and forensic perspective."

Wikileaks has carefully reviewed the "Year Zero" disclosure and published substantive CIA documentation while avoiding the distribution of 'armed' cyberweapons until a consensus emerges on the technical and political nature of the CIA's program and how such 'weapons' should analyzed, disarmed and published.

Wikileaks has also decided to Redact (see far below) and Anonymize some identifying information in "Year Zero" for in depth analysis. These redactions include ten of thousands of CIA targets and attack machines throughout,
Latin America Europe the United States

While we are aware of the imperfect results of any approach chosen, we remain committed to our publishing model and note that the quantity of published pages in "Vault 7" part one ("Year Zero") already eclipses the total number of pages published over the first three years of the Edward Snowden NSA leaks.

Analysis

CIA malware targets iPhone, Android, smart TVs
CIA malware and hacking tools are built by EDG (Engineering Development Group), a software development group within CCI (Center for Cyber Intelligence), a department belonging to the CIA's DDI (Directorate for Digital Innovation).
The DDI is one of the five major directorates of the CIA (see above image of the CIA for more details).
The EDG is responsible for the development, testing and operational support of all backdoors, exploits, malicious payloads, trojans, viruses and any other kind of malware used by the CIA in its covert operations world-wide.
The increasing sophistication of surveillance techniques has drawn comparisons with George Orwell's 1984, but "Weeping Angel", developed by the CIA's Embedded Devices Branch (EDB), which infests smart TVs, transforming them into covert microphones, is surely its most emblematic realization.
The attack against Samsung smart TVs was developed in cooperation with the United Kingdom's MI5/BTSS.
After infestation, Weeping Angel places the target TV in a 'Fake-Off' mode, so that the owner falsely believes the TV is off when it is on. In 'Fake-Off' mode the TV operates as a bug, recording conversations in the room and sending them over the Internet to a covert CIA server.
As of October 2014 the CIA was also looking at infecting the vehicle control systems used by modern cars and trucks. The purpose of such control is not specified, but it would permit the CIA to engage in nearly undetectable assassinations.
The CIA's Mobile Devices Branch (MDB) developed numerous attacks to remotely hack and control popular smart phones. Infected phones can be instructed to send the CIA the user's geolocation, audio and text communications as well as covertly activate the phone's camera and microphone.
Despite iPhone's minority share (14.5%) of the global smart phone market in 2016, a specialized unit in the CIA's Mobile Development Branch produces malware to infest, control and exfiltrate data from iPhones and other Apple products running iOS, such as iPads.
CIA's arsenal includes numerous local and remote "zero days" developed by CIA or obtained from GCHQ, NSA, FBI or purchased from cyber arms contractors such as Baitshop.
The disproportionate focus on iOS may be explained by the popularity of the iPhone among social, political, diplomatic and business elites.
A similar unit targets Google's Android which is used to run the majority of the world's smart phones (~85%) including Samsung, HTC and Sony. 1.15 billion Android powered phones were sold last year.
"Year Zero" shows that as of 2016 the CIA had 24 "weaponized" Android "zero days" which it has developed itself and obtained from GCHQ, NSA and cyber arms contractors.
These techniques permit the CIA to bypass the encryption of, WhatsApp
  1. Signal
  2. Telegram
  3. Wiebo
  4. Confide
  5. Cloackman
...by hacking the "smart" phones that they run on and collecting audio and message traffic before encryption is applied.
CIA malware targets Windows, OSx, Linux, routers
The CIA also runs a very substantial effort to infect and control Microsoft Windows users with its malware.
This includes multiple local and remote weaponized "zero days", air gap jumping viruses such as "Hammer Drill" which infects software distributed on CD/DVDs, infectors for removable media such as USBs, systems to hide data in images or in covert disk areas ("Brutal Kangaroo") and to keep its malware infestations going.
Many of these infection efforts are pulled together by the CIA's Automated Implant Branch (AIB), which has developed several attack systems for automated infestation and control of CIA malware, such as "Assassin" and "Medusa".
Attacks against Internet infrastructure and webservers are developed by the CIA's Network Devices Branch (NDB).
The CIA has developed automated multi-platform malware attack and control systems covering Windows, Mac OS X, Solaris, Linux and more, such as EDB's "HIVE" and the related "Cutthroat" and "Swindle" tools, which are described in the examples section far below.
CIA 'hoarded' vulnerabilities ("zero days")
In the wake of Edward Snowden's leaks about the NSA, the U.S. technology industry secured a commitment from the Obama administration that the executive would disclose on an ongoing basis - rather than hoard - serious vulnerabilities, exploits, bugs or "zero days" to Apple, Google, Microsoft, and other US-based manufacturers.
Serious vulnerabilities not disclosed to the manufacturers places huge swathes of the population and critical infrastructure at risk to foreign intelligence or cyber criminals who independently discover or hear rumors of the vulnerability.
If the CIA can discover such vulnerabilities so can others.
The U.S. government's commitment to the Vulnerabilities Equities Process came after significant lobbying by US technology companies, who risk losing their share of the global market over real and perceived hidden vulnerabilities.
The government stated that it would disclose all pervasive vulnerabilities discovered after 2010 on an ongoing basis.
"Year Zero" documents show that the CIA breached the Obama administration's commitments. Many of the vulnerabilities used in the CIA's cyber arsenal are pervasive and some may already have been found by rival intelligence agencies or cyber criminals.
As an example, specific CIA malware revealed in "Year Zero" is able to penetrate, infest and control both the Android phone and iPhone software that runs or has run presidential Twitter accounts.
The CIA attacks this software by using undisclosed security vulnerabilities ("zero days") possessed by the CIA but if the CIA can hack these phones then so can everyone else who has obtained or discovered the vulnerability.
As long as the CIA keeps these vulnerabilities concealed from Apple and Google (who make the phones) they will not be fixed, and the phones will remain hackable.
The same vulnerabilities exist for the population at large, including the U.S. Cabinet, Congress, top CEOs, system administrators, security officers and engineers.
By hiding these security flaws from manufacturers like Apple and Google the CIA ensures that it can hack everyone at the expense of leaving everyone hackable.
'Cyberwar' programs are a serious proliferation risk
Cyber 'weapons' are not possible to keep under effective control.
While nuclear proliferation has been restrained by the enormous costs and visible infrastructure involved in assembling enough fissile material to produce a critical nuclear mass, cyber 'weapons', once developed, are very hard to retain.
Cyber 'weapons' are in fact just computer programs which can be pirated like any other. Since they are entirely comprised of information they can be copied quickly with no marginal cost.
Securing such 'weapons' is particularly difficult since the same people who develop and use them have the skills to exfiltrate copies without leaving traces - sometimes by using the very same 'weapons' against the organizations that contain them.
There are substantial price incentives for government hackers and consultants to obtain copies since there is a global "vulnerability market" that will pay hundreds of thousands to millions of dollars for copies of such 'weapons'.
Similarly, contractors and companies who obtain such 'weapons' sometimes use them for their own purposes, obtaining advantage over their competitors in selling 'hacking' services.
Over the last three years the United States intelligence sector, which consists of government agencies such as the CIA and NSA and their contractors, such as Booz Allan Hamilton, has been subject to unprecedented series of data exfiltrations by its own workers.
A number of intelligence community members not yet publicly named have been arrested or subject to federal criminal investigations in separate incidents.
Most visibly, on February 8, 2017 a U.S. federal grand jury indicted Harold T. Martin III with 20 counts of mishandling classified information.
The Department of Justice alleged that it seized some 50,000 gigabytes of information from Harold T. Martin III that he had obtained from classified programs at NSA and CIA, including the source code for numerous hacking tools.
Once a single cyber 'weapon' is 'loose' it can spread around the world in seconds, to be used by peer states, cyber mafia and teenage hackers alike.
U.S. Consulate in Frankfurt is a covert CIA hacker base
In addition to its operations in Langley, Virginia the CIA also uses the U.S. consulate in Frankfurt as a covert base for its hackers covering Europe, the Middle East and Africa.
CIA hackers operating out of the Frankfurt consulate ("Center for Cyber Intelligence Europe" or CCIE) are given diplomatic ("black") passports and State Department cover.
The instructions for incoming CIA hackers make Germany's counter-intelligence efforts appear inconsequential: "Breeze through German Customs because you have your cover-for-action story down pat, and all they did was stamp your passport" Your Cover Story (for this trip) Q: Why are you here? A: Supporting technical consultations at the Consulate. Two earlier WikiLeaks publications give further detail on CIA approaches to customs and secondary screening procedures.
Once in Frankfurt CIA hackers can travel without further border checks to the 25 European countries that are part of the Shengen open border area - including France, Italy and Switzerland.
A number of the CIA's electronic attack methods are designed for physical proximity.
These attack methods are able to penetrate high security networks that are disconnected from the internet, such as police record database. In these cases, a CIA officer, agent or allied intelligence officer acting under instructions, physically infiltrates the targeted workplace.
The attacker is provided with a USB containing malware developed for the CIA for this purpose, which is inserted into the targeted computer. The attacker then infects and exfiltrates data to removable media.
For example, the CIA attack system Fine Dining, provides 24 decoy applications for CIA spies to use.
To witnesses, the spy appears to be running a program showing videos (e.g VLC), presenting slides (Prezi), playing a computer game (Breakout2, 2048) or even running a fake virus scanner (Kaspersky, McAfee, Sophos).
But while the decoy application is on the screen, the underlying system is automatically infected and ransacked.
How the CIA dramatically increased proliferation risks
In what is surely one of the most astounding intelligence own goals in living memory, the CIA structured its classification regime such that for the most market valuable part of "Vault 7", the CIA's, weaponized malware (implants + zero days) Listening Posts (LP) Command and Control (C2) systems, ...the agency has little legal recourse.
The CIA made these systems unclassified.
Why the CIA chose to make its cyber-arsenal unclassified reveals how concepts developed for military use do not easily crossover to the 'battlefield' of cyber 'war'.
To attack its targets, the CIA usually requires that its implants communicate with their control programs over the internet.
If CIA implants, Command & Control and Listening Post software were classified, then CIA officers could be prosecuted or dismissed for violating rules that prohibit placing classified information onto the Internet.
Consequently the CIA has secretly made most of its cyber spying/war code unclassified. The U.S. government is not able to assert copyright either, due to restrictions in the U.S. Constitution.
This means that cyber 'arms' manufactures and computer hackers can freely "pirate" these 'weapons' if they are obtained. The CIA has primarily had to rely on obfuscation to protect its malware secrets.
Conventional weapons such as missiles may be fired at the enemy (i.e. into an unsecured area). Proximity to or impact with the target detonates the ordnance including its classified parts. Hence military personnel do not violate classification rules by firing ordnance with classified parts.
Ordnance will likely explode. If it does not, that is not the operator's intent.
Over the last decade U.S. hacking operations have been increasingly dressed up in military jargon to tap into Department of Defense funding streams.
For instance, attempted "malware injections" (commercial jargon) or "implant drops" (NSA jargon) are being called "fires" as if a weapon was being fired.
However the analogy is questionable.
Unlike bullets, bombs or missiles, most CIA malware is designed to live for days or even years after it has reached its 'target'. CIA malware does not "explode on impact" but rather permanently infests its target. In order to infect target's device, copies of the malware must be placed on the target's devices, giving physical possession of the malware to the target.
To exfiltrate data back to the CIA or to await further instructions the malware must communicate with CIA Command & Control (C2) systems placed on internet connected servers.
But such servers are typically not approved to hold classified information, so CIA command and control systems are also made unclassified.
A successful 'attack' on a target's computer system is more like a series of complex stock maneuvers in a hostile take-over bid or the careful planting of rumors in order to gain control over an organization's leadership rather than the firing of a weapons system.
If there is a military analogy to be made, the infestation of a target is perhaps akin to the execution of a whole series of military maneuvers against the target's territory including observation, infiltration, occupation and exploitation.
Evading forensics and anti-virus
A series of standards lay out CIA malware infestation patterns which are likely to assist forensic crime scene investigators as well as, Apple
  1. Microsoft
  2. Google
  3. Samsung
  4. Nokia
  5. Blackberry
  6. Siemens
  7. anti-virus companies,
...attribute and defend against attacks.
"Tradecraft DO's and DON'Ts" contains CIA rules on how its malware should be written to avoid fingerprints implicating the "CIA, US government, or its witting partner companies" in "forensic review".
Similar secret standards cover the, use of encryption to hide CIA hacker and malware communication (pdf) describing targets & exfiltrated data (pdf) executing payloads (pdf) persisting (pdf), ...in the target's machines over time.
CIA hackers developed successful attacks against most well known anti-virus programs.
These are documented in, AV defeats Personal Security Products Detecting and defeating PSPs PSP/DebuggeRE Avoidance For example, Comodo was defeated by CIA malware placing itself in the Window's "Recycle Bin". While Comodo 6.x has a "Gaping Hole of DOOM".
CIA hackers discussed what the NSA's "Equation Group" hackers did wrong and how the CIA's malware makers could avoid similar exposure.

Examples

The CIA's Engineering Development Group (EDG) management system contains around 500 different projects (only some of which are documented by "Year Zero") each with their own sub-projects, malware and hacker tools.
The majority of these projects relate to tools that are used for,
penetration infestation ("implanting") control exfiltration
Another branch of development focuses on the development and operation of Listening Posts (LP) and Command and Control (C2) systems used to communicate with and control CIA implants.
Special projects are used to target specific hardware from routers to smart TVs.
Some example projects are described below, but see the table of contents for the full list of projects described by WikiLeaks' "Year Zero".
UMBRAGE
The CIA's hand crafted hacking techniques pose a problem for the agency.
Each technique it has created forms a "fingerprint" that can be used by forensic investigators to attribute multiple different attacks to the same entity.
This is analogous to finding the same distinctive knife wound on multiple separate murder victims. The unique wounding style creates suspicion that a single murderer is responsible.
As soon one murder in the set is solved then the other murders also find likely attribution.
The CIA's Remote Devices Branch's UMBRAGE group collects and maintains a substantial library of attack techniques 'stolen' from malware produced in other states including the Russian Federation.
With UMBRAGE and related projects the CIA cannot only increase its total number of attack types but also misdirect attribution by leaving behind the "fingerprints" of the groups that the attack techniques were stolen from.
UMBRAGE components cover,
keyloggers
  1. password collection
  2. webcam capture
  3. data destruction
  4. persistence
  5. privilege escalation
  6. stealth
  7. anti-virus (PSP) avoidance
  8. survey techniques

Fine Dining
Fine Dining comes with a standardized questionnaire i.e menu that CIA case officers fill out.
The questionnaire is used by the agency's OSB (Operational Support Branch) to transform the requests of case officers into technical requirements for hacking attacks (typically "exfiltrating" information from computer systems) for specific operations.
The questionnaire allows the OSB to identify how to adapt existing tools for the operation, and communicate this to CIA malware configuration staff.
The OSB functions as the interface between CIA operational staff and the relevant technical support staff.
Among the list of possible targets of the collection are,
  • 'Asset'
  • 'Liason Asset'
  • 'System Administrator'
  • 'Foreign Information Operations'
  • 'Foreign Intelligence Agencies'
  • 'Foreign Government Entities'
Notably absent is any reference to extremists or transnational criminals. The 'Case Officer' is also asked to specify the environment of the target like the type of computer, operating system used, Internet connectivity and installed anti-virus utilities (PSPs) as well as a list of file types to be exfiltrated like Office documents, audio, video, images or custom file types.
The 'menu' also asks for information if recurring access to the target is possible and how long unobserved access to the computer can be maintained.
This information is used by the CIA's 'JQJIMPROVISE' software (see below) to configure a set of CIA malware suited to the specific needs of an operation.
Improvise (JQJIMPROVISE)
  1. 'Improvise' is a toolset for configuration, post-processing, payload setup and execution vector
  2. selection for survey/exfiltration tools supporting all major operating systems like,
  3. Windows (Bartender)
  4. MacOS (JukeBox)
  5. Linux (DanceFloor)
  6. Its configuration utilities like Margarita allows the NOC (Network Operation Center) to customize tools
based on requirements from 'Fine Dining' questionnaires.
HIVE
HIVE is a multi-platform CIA malware suite and its associated control software.
The project provides customizable implants for Windows, Solaris, MikroTik (used in internet routers) and Linux platforms and a Listening Post (LP)/Command and Control (C2) infrastructure to communicate with these implants.
The implants are configured to communicate via HTTPS with the webserver of a cover domain; each operation utilizing these implants has a separate cover domain and the infrastructure can handle any number of cover domains.
Each cover domain resolves to an IP address that is located at a commercial VPS (Virtual Private Server) provider.
The public-facing server forwards all incoming traffic via a VPN to a 'Blot' server that handles actual connection requests from clients.
It is setup for optional SSL client authentication: if a client sends a valid client certificate (only implants can do that), the connection is forwarded to the 'Honeycomb' toolserver that communicates with the implant.
If a valid certificate is missing (which is the case if someone tries to open the cover domain website by accident), the traffic is forwarded to a cover server that delivers an unsuspicious looking website.
The Honeycomb toolserver receives exfiltrated information from the implant; an operator can also task the implant to execute jobs on the target computer, so the toolserver acts as a C2 (command and control) server for the implant.
Similar functionality (though limited to Windows) is provided by the RickBobby project.
See the classified user and developer guides for HIVE.

Frequently Asked Questions

Why now?
WikiLeaks published as soon as its verification and analysis were ready. In February the Trump administration has issued an Executive Order calling for a "Cyberwar" review to be prepared within 30 days.
While the review increases the timeliness and relevance of the publication it did not play a role in setting the publication date.
Redactions
Names, email addresses and external IP addresses have been redacted in the released pages (70,875 redactions in total) until further analysis is complete. Over-redaction: Some items may have been redacted that are not employees, contractors, targets or otherwise related to the agency, but are, for example, authors of documentation for otherwise public projects that are used by the agency.
Identity vs. person: the redacted names are replaced by user IDs (numbers) to allow readers to assign multiple pages to a single author. Given the redaction process used a single person may be represented by more than one assigned identifier but no identifier refers to more than one real person.
Archive attachments (zip, tar.gz, ...), are replaced with a PDF listing all the file names in the archive. As the archive content is assessed it may be made available; until then the archive is redacted.
Attachments with other binary content, are replaced by a hex dump of the content to prevent accidental invocation of binaries that may have been infected with weaponized CIA malware. As the content is assessed it may be made available; until then the content is redacted.
Tens of thousands of routable IP addresses references, (including more than 22 thousand within the United States) that correspond to possible targets, CIA covert listening post servers, intermediary and test systems, are redacted for further exclusive investigation.
Binary files of non-public origin, are only available as dumps to prevent accidental invocation of CIA malware infected binaries.
Organizational Chart
The organizational chart (far above image) corresponds to the material published by WikiLeaks so far.
Since the organizational structure of the CIA below the level of Directorates is not public, the placement of the EDG and its branches within the org chart of the agency is reconstructed from information contained in the documents released so far.
It is intended to be used as a rough outline of the internal organization; please be aware that the reconstructed org chart is incomplete and that internal reorganizations occur frequently.
Wiki pages
"Year Zero" contains 7818 web pages with 943 attachments from the internal development groupware. The software used for this purpose is called Confluence, a proprietary software from Atlassian.
Webpages in this system (like in Wikipedia) have a version history that can provide interesting insights on how a document evolved over time; the 7818 documents include these page histories for 1136 latest versions.
The order of named pages within each level is determined by date (oldest first). Page content is not present if it was originally dynamically created by the Confluence software (as indicated on the re-constructed page).
What time period is covered?
The years 2013 to 2016. The sort order of the pages within each level is determined by date (oldest first).
WikiLeaks has obtained the CIA's creation/last modification date for each page but these do not yet appear for technical reasons. Usually the date can be discerned or approximated from the content and the page order.
If it is critical to know the exact time/date contact WikiLeaks.
What is "Vault 7"
"Vault 7" is a substantial collection of material about CIA activities obtained by WikiLeaks.
When was each part of "Vault 7" obtained?
Part one was obtained recently and covers through 2016. Details on the other parts will be available at the time of publication.
Is each part of "Vault 7" from a different source?
Details on the other parts will be available at the time of publication.
What is the total size of "Vault 7"?
The series is the largest intelligence publication in history.
How did WikiLeaks obtain each part of "Vault 7"?
Sources trust WikiLeaks to not reveal information that might help identify them.
Isn't WikiLeaks worried that the CIA will act against its staff to stop the series?
No. That would be certainly counter-productive.
Has WikiLeaks already 'mined' all the best stories?
No. WikiLeaks has intentionally not written up hundreds of impactful stories to encourage others to find them and so create expertise in the area for subsequent parts in the series. They're there.
Look. Those who demonstrate journalistic excellence may be considered for early access to future parts.
Won't other journalists find all the best stories before me?
Unlikely. There are very considerably more stories than there are journalists or academics who are in a position to write them.
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