I don’t think that the baudrate is the point in my problem.
The hello world works with RFBee link with both 115200 and 9600 baudrates.
Firmata works on USB link with both 115200 and 9600 baudrates.
But I cannot make firmata work with RFBee!
Does anyone knows enough the Firmware to explain that?
I tried to remove all extra string prints by rfbee firmware (like “ok”) not to mess with the firmata protocole, but without success…