Example 3 works well with the Arduino UNO by just hooking up pins 3 and 4 which is trivial when you stack it but if I attempt the stack the GPS on the Arduino Mega 2560 I receive no incoming data... Which pins of the Arduino MEGA do I connect to.
What makes pins 3 and 4 so special....
what do I modify in the dGPS.cpp class file?
define SoftrxPin 3
define SofttxPin 4
do I modify these pins?