I'm short of pins, due largely to the fact that the DF Robotics LCD uses so many. (NTS: must upgrade to a more modern LCD....)
I'm likely to need to use the Tx and Rx pins, which I've never used before. I know that using them will preclude the use of Serial, which is ok for the project at hand.
But, I just wanted to check the connection practicalities: as far as I can remember reading here, I should disconnect any sensors or activators from those pins during upload, and reconnect when the sketch is uploaded. Is that right?
Otoh I think I read it's bad practice to un/plug pins while the board is live, which is back ass-wards from the above.
Clarity please anyone?