Indeed we have the "socket.accept ()" method in the first LoPy, but the problem was in the pointing address to the other LoPy which was wrong. It's already solved, thank you!

@pierrot10 Yes, you can use a FTDI cable, or a RasPi. YOu need to connect Tx, Rx and GND. Verify that the output voltage of the adaper is set to 3.3V, since ESP32 input are not 5V tolerant.

@jeromemaquoi yes, you got 'done' if on the destination side port is open and something is listen

@ahaw021 @bnjroos Thanks for the information, I really appreciate it. I'd like to give a go for option A as it seems more straightforward. :)