We stuck here in finding a firmware which works for the ads1299FE demo kit with the arduino UNO to continue our projects with the ads1299:

https://github.com/openbci-archive/_DEPRECATED_OpenBCI-V2hardware/issues/28

This is the best discussion we found about this topic, and the discussion seem to be given up here. If these developers give it up, we do it also.

If we want to interface the ads1299FE demo kit wit Matlab, we need to develop our own firmware to control the EVM interface via Matlab. This is what the TI support says:

Can the Texas Instruments ADS1299EEGFE-PDK evaluation kit used with third party software?

The solution given above was the only which would be interesting for us personally which we know, which seem to be given up.

The BEATS: An open-source, high-precision, multi-channel EEG acquisition tool system

https://scholar.google.com/scholar?hl=de&as_sdt=0%2C5&q=BEATS%3A+An+Open-Source%2C+High-Precision%2C+Multi-Channel+EEG+Acquisition+Tool+System&btnG=

paper with 32 channels has only been cited 3 times. The paper does not show 32 channels with a good signal quality. And the reserachgate.net papers of the Indonesian scientists where hardly cited, which means that it was for hardly anyone reproducable what they did, and they did hardly have any followers. So unless someone proofs us the opposite, we invite you to go this path for EEG devices with more than 16 channels:

To build your physiological multi-sensor device based on the ADS1299 chip from Texas Instruments or based on InfluxDB?

Which means the development for ads1299 devices with more than 16 channels has come to an end. Since no one could offer a solution which had followers for this problem. And who wants to make a PhD. to develop firmware for a 10 year old ads1299 chip, if InfluxDB is on the market since 10 years?