First of all I want to thank OE1ACM Bernd for his approval to use his code for my experiments. He is the author of BG_RF95!

USER GUIDE of TTGO T-Beam LoRa APRS:
Callsign setting:
If you start the FW for the first time you are asked to program your callsign and SSID(s).
Once the callsign is programmed you can reenter the programming mode by pressing the BUTTON (GPIO39) for 3secs while switching on the tracker.

The MODE of the tracker can now be changed by pressing button at GPIO39 for 10secs!
The modes are
TRACKER ... normal APRS tracker
WX&TRACKER ... alternate transmission of normal position packet and WX packet (if DHT22 is mounted)
WX-MOVE ... only WX packets are sent but with position from GPSLED
WX-FIXED ... only WX packets are transmitted but with fixed position given in Header-File

The fixed position is used for a fixed weather station, e.g. without GPS signal.

Possible symbols are
Weather Station, Car, Runner, Bicyle, Motorcycle

for DHT22 I used the library from https://github.com/beegee-tokyo/DHTesp, as the standard library gives to many wrong readings