RAK4631 - GPS Tracker Example

Hi Greg,

The examples codes are kept as simple as possible and have their flaws when you try to extend them.

Most likely what is happening here is the same as what happened to Charles => RAK4630 LoRa halts on LoRa TX when more than 12 bytes in packet - #9

The reading from the RAK1910 is done from the timer interrupt routine. That works fine as long as the code is not getting to lengthy.
You can try the changes I proposed there (use a flag and process the data from the loop() instead.

Or you can have a look into the LPWAN-Tracker-Solution which is a complete event and interrupt driven tracker solution that is better for battery consumption, as the MCU is kept in low power mode unless it is necessary to do something.