«Again, as mentioned previously, usb wired connection is not recommended as it is difficult and there were also issues with increasing the bit rate over the cable. It’s easiest and most supported to use the Cyton dongle in a usb host port»
Here is an instruction for wired usb:
https://github.com/WinslowStrong/OpenBCI_Wired_USB
It is not as easy as we described previously. We cannot simply connect wires from OpenBCI Cyton to the GPIO pins of a Rasbperry Pi.