Open Collector TX

[muebau]

What would be needed to (if possible) to change the TX to an open collector like output.

I TX is LOW the output pin would be GND and if TX would be HIGH the pin would be floating (eg. high impedance, Z) but not VCC.

I thought one way to implement this could be a simple 'copy' PIO code which simply mirrors the TX state but gets 'Z' instead of HIGH (VCC).

Is there a simple way to implement this?