marcolindo94:
maybe i use rs485... connecting the control pin of the MAX485 to an output of arduino, i can control the direction of messages (TX or RX).. Is it right?Maybe is the better choice...
Thanks, Marco
Ps: now i do some experiments...
If you use but one twisted pair then only half-duplex is possible and a need to switch converter chips from send to receive mode is required in your software. However if you run two twisted pairs then true full-duplex is possible and the converter chips are 'hardwired' to send and receive modes.
Lefty