I'd like to use the hardware serial port for my RFID reader, the ID-20LA from Sparkfun. It outputs a nice tag reading to TTL on my UNO's RX pin.
I'd also like to use the TX serial port (the TX from the UNO) to send events to my laptop for debugging. I won't be sending data TO the UNO on the serial port.
I will be disconnecting the RFID reader anytime I'm uploading my sketch. Are there any other reasons I should have a problem with this. It works in a bench test, but I'm making a custom PCB, and installing in an application that I don't want to sporadically fail. Thanks,