I have an application where I need to receive serial data only, no transmit required. Is there anything in the TinyCLR library that would prevent a single wire RX-only serial application, and just leave the TX pin as an unconnected output or not use it at all? I ask because it’s one less required pin on a header, one less wire to run in the harness, etc etc.
You can leave the TX pin unconnected and RX will still function fine.
If you write to it, the pin state will still change, but if it’s unconnected that shouldn’t be an issue.