https://openbci.com/forum/index.php?p=/discussion/3750/using-two-cyton-daisy-boards-with-one-brain-one-computer If works what we describe here then it would be possible to build a professional multi-sensor EEG device with as many PiEEG as required. With OpenBCI this is not possible without a hardware change. PiEEG with 4 channels are available right now, PiEEG with 8 channels: orders placed now ship Apr 29, 2024: https://www.crowdsupply.com/hackerbci/pieeg#product