I'm new with Arduino. How do you check or set the RX and TX jumpers? I have an Arduino Mega. I can see a row of jumpers RX - TX (0 0,3 3,2 2,1 1) but the shield gets only to the TX0(1) and RX0(1) and I read here that you must set it to 3,4. How does it works?
I'm using the replay #130 and a I get this message: "No GPS data received: check wiring". At some time I changed the voltage from 5 to 3.3. Now I have it at 5. Did I kill my GPS?
Thanks for your help