This program adds GPS functionality to the following code:

https://github.com/f4goh/WSPR/tree/master/src/IK1HGI/wsprEncode

Note: Connect TX pin of the NEO-6M GPS module to pin D4 of Arduino Nano or to the TXGPS pin on the F4GOH PCB board.

Connect D3 pin to an external LED (via a resistor) for GPS SYNC indication.

On Arduino startup, it will automatically try to do a GPS time sync.

Launch the Serial Monitor (at a baud rate of 9600) and send the g command to trigger a GPS update manually.