I have set up the CmdMessenger
example sketch on my Arduino Mega 2560.
When I hook the arduino up to my PC and open the serial monitor, I get the initial '1,Arduino ready;' message appear in my serial monitor.
When I send example data to the arduino from my serial monitor, nothing is sent back. It's as if the arduino doesn't recognise the command, or even acknowledge receipt of any data at all.
I have tried sending '4,hi,heh,ho!;' and '5;' etc.
I have tried all of the different line ending options in the serial monitor. The baud rate is correct. The LED flashes constantly as expected.