Member level 4
If my controller card has only 2 serial ports and I want to use one as a monitor but I need 2 more, can I just use relays to switch the ttl receive and send to another rs232 port? Essentially, I would have a double pole double throw switch. The controller card would send a command to 1 serial port, wait for a response, then switch to the other and do the same. Can someone tell me why that wouldn't work?