What is the function of the diode received by the serial port?
Enrico postato su November 5, 2020
Reverse cut off to prevent backflow.
Fabrizio postato su November 5, 2020
This feels like a potential conversion effect.
Robinson postato su November 5, 2020
5V and 3.3V level conversion.
West postato su November 5, 2020
OPEN DRAIN Potential conversion.