Reply To: Bringing in serial data through UART on 20-Pin connector

I’m just seconding what Shannon said about using the hardware UART – always use hardware UART unless you definitely cannot.  In your case where you’ll be parsing long NMEA sentences, I’d recommend actually re-wiring your Bee/modem to give your GPS the better connection if you’re trying to use both.  In your code, you just use “Serial1” to communicate over the RX1/TX1 exactly like you would use “Serial”  when writing to the computer.  AltSoftSerial is the next best alternative – on the Mayfly with AltSS Rx will be on pin 6 and Tx on pin 5 (and only those pins).  Like Shannon said, you can use any pin that allows pin-change interrupts for SoftwareSerial (which is nearly any digital pin on the Mayfly) but you are more likely to have misread data using it.