A python program for 2-way texting with the REYAX RYLR998 33cm band LoRa module and the Raspberry Pi 4. GOTA with a Raspberry Pi 4 Model B Rev 1.5, a RYLR998 module, five wires and ten female-female GPIO connectors. No threads: only asynchronous non-blocking I/O calls.

Code: https://github.com/flengyel/RYLR998-LoRa

Side-by-side SSH sessions into a Raspberry Pi with an attached RYLR998, running rylr998.py. Yellow is transmitted text; magenta is received text. LoRa indicator flashes red on xmt, green on rcv.