icssw-org/MeshCom-Firmware — reverse-engineered prompt

Please get this MeshCom 4.0 firmware into a working state for small ESP32 and LoRa boards. I want it to act like an off grid amateur radio text messenger, where each device has a callsign, can send short messages to everyone or directly to another callsign, gets acknowledgements, repeats messages for the mesh, and can send regular status, position, weather, or telemetry data when hardware supports it.

It should use the APRS style message format described in the README, work with the supported LoRa settings and regional frequencies, and be buildable and flashable through PlatformIO in VS Code. Please make the configuration clear for callsign, board type, LoRa region, gateway mode, WiFi if needed, and display or serial use. Messages should be viewable on a small OLED, over Bluetooth to a phone or tablet, or through USB serial where supported.

Look up current docs online if you need to, and leave me with simple build and flashing instructions.