I’ve tried connecting COM1 on the RJ11 port on the robot kit to TeraTerm on the PC and unfortunately ran into some issues.
Sending data from TeraTerm to the device works fine.
Sending data from the device to TeraTerm does not work at all.
Initially, I played with various baud rates thinking that was the issue, but nothing worked (though the device kept receiving data just fine). Finally I broke out the oscilloscope. The RJ11 has 4 leads and only one of the them registered any type of signal (and only when receiving data). Sending data generated no signals on any leads in any way, shape or form.
This leads me to think that there any number of issues.
Either the Robot Kit has a faulty COM1.
Perhaps there is something special to initializing COM1 that I am not taking into account (just using standard SerialPort object with 115200,N81, no handshaking).
Anything else that I am not thinking about?
Any ideas on how to rectify the situation?