Issue with serial protocol


I am trying to run EdgeImpulse locally on a Nano 33 BLE Sense. After flashing the device, it will accept one AT command, but then for every subsequent command, the board returns “Not a valid AT command”. Is this an issue with the serial protocol? I am using coolTerm with baud rate 115200 and 8-N-1.

I tried using screen but get the same issue as well the CR command not being executed.


@cjohnston21, that’s interesting… Which OS are you running on? With macOS and this firmware I can run subsequent commands fine using screen.

Also does edge-impulse-daemon work properly? It communicates over serial with the board, so if there’s something more fundamental wrong that should start failing as well.