There is a lot of information available for the 16 / 32 Channel EEG Ads1299 EMG EEG Acquisition Module:
https://www.aliexpress.com/item/1005002553363982.html?spm=a2g0o.cart.0.0.21313c00EvgW1g&mp=1
«TI ADS1299/1298 Low power consumption for bioelectrical potential measurement、24 Bit analog front end，General module of ECG and EMG test，Development customization。
Please confirm the following parameters：Interface，sampling rate（default500），Number of channels（1/2/4/8/16/32），Noise，Data transmission mode（Bluetooth、WIFI、TFcard），Endurance，size，PCBNumber of layers，Is a shield required。
16/32Channel EEG customization，Contact customer service before shooting to explain the demand.
parameter：
250 Samples per Second (SPS) to 16 Thousands of samples per second (kSPS) default500
Input reference noise： 1 μVPP（Bandwidth is 70Hz）
Programmable gain： 1， 2， 4， 6， 8， 12 perhaps 24
ADC：24position
CMRR： -110dB
Number of channels：8/16/32Optional
Commodities include：
1 Acquisition equipment+parts( Battery850mah，TYPCdata line*1，Electrode piece50slice +STLINKDownloader )；
2 Electronic data（ After receiving the goods, you can contact customer service）
3 2.0Arranging wires*2 +2.0Curved needle seat*2
Electronic information includes：Upper computer drawing software、SCM source code、The circuit principle diagram，Module test data；
（be careful：Data not includedPCBchart，The upper computer software only has the function of drawing and recording，Can’t filter，Other functions need to be developed。）
be careful：The front-end interface of this module isPHD2.0Connector2x17PDouble row curved needle seat，EEG cap or electrode wire should be provided by oneself。
be careful：TFThe card is a reserved function，Not in routineTFStorage function。
Software can only be drawn at the same time16The waveform of each channel，Watch another16Two channels need to be manually switched，The upper computer needs to be developed by users themselves。
Need other test data, welcome to consult customer service。
Module test good delivery，You can draw and test at hand。
Test picture
500sampling rate，24Multiple gain，passageway1Test signal，raw data。
Input reference noise ~1.2uV
EEG
Electromyography
electric
Important tips：（I have agreed to the following）
Most of the modules are not in stock，Basically3-7Genius can test good delivery，Before shooting, you can contact customer service to confirm the delivery time。
Use of source programSTM32Series MCU，Modifying the adjustment procedure requires the use ofKEILSoftware，Please build it yourselfMDK ARMCompiling environment，Beginners should shoot carefully。
The time of providing technical support is40day，After receiving the express, please test according to the instructions，If the test is correct, you can ask for other electronic data（schematic diagram，source program，PCBetc.）,After receiving electronic data such as schematic diagram，No return for non quality problems。Please keep the information properly，Subsequent updated programs or materials may not be applicable to the module you are currently using，The problem caused by overtime is not responsible。Because important chips and devices are exposed，Vulnerable to various causes of damage，Except for important chips，Non human damage，Support maintenance，Freight by post，Please pay attention to avoid damage caused by static electricity and collision。
Customized attention：Due to the customized module needs to catch up，Schematic diagram andPCBIt is usually modified directly on the old circuit，Some component names or parameters may be wrong（Mainly power supply and other chips），Before purchasing, please check the chip screen printing and packaging according to the schematic diagram and actual module，If you have any questions, you can communicate with the technical staff，Please test several samples before batch processing，Direct use of thePCBAnd the loss caused by mass production of schematic diagram，Our store is not responsible。
All modules need to be tested before delivery，Orders before Thursday，It can be sent out on weekends，You can contact customer service to confirm the delivery time。
There is a lot of information available for this board. This is great for this 16 / 32 Channel EEG board. When will a paper come out to test it?
There is already a paper for a similar board:
https://aip.scitation.org/doi/pdf/10.1063/1.4991253
Reading out sensor data from this board needs a second read out. An example code how to read out sensor data from this board would be helpful.
15.1.2022
The price of the 32 channel board has risen to about twice the prize
from about 600 USD at it was when it was sold first to about 1200 USD.
A setup which costs less is a setup with multiple OpenBCI boards from Aliexpress:
which are streamed into an InfluxDB to reach the desired number of channels: