I have several similar serial protocols built using the SerialCommand library. They work well with many different Unos and with a Mega.
I have today installed the code for one of the Unos onto a 101 and have a baffling problem: my desktop app cannot receive serial messages from this.
With the same code on a Uno it works fine.
With the serial monitor it works fine on the 101.
With a third party serial terminal it works fine on the 101.
The 101 receives commands fine (and acts on them, so I know they’re going through).
But I cannot detect any response, not even in a data available event, from my desktop app.
Is there something subtly different about the 101 serial transmission?