ESP32 LoRa APRS Modem

amateur-radio aprs aprs-rx aprs-tracker aprsdroid aprsis codec2 esp32 esp32-ardunio esp32-library ham-radio iot kiss lora lora-gateway lora-server lorawan tnc tracker uhf

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README.md

ESP32 LoRa APRS Modem

This project is amateur radio ESP32 based LoRa KISS Bluetooth/BLE/USB/TCPIP modem + LoRa APRS-IS RX/TX iGate server over WiFI + LoRa APRS digipeater + Codec2 DV modem (with Codec2 Talkie Android application).

⚠ To configure sketch modify default parameters in config.h file.

For project description, detailed setup and more information, please, visit our Wiki at https://github.com/sh123/esp32_loraprs/wiki
For discussions, visit https://github.com/sh123/esp32_loraprs/discussions

⚠ Project also supports APRSDroid TNC2 text APRS packet mode (configurable), which makes it interoperable with other LoRa APRS trackers without AX25 support.

Supported module types: SX126X, SX127X and other modules supported by RadioLib.

Modules, which are used by users and known to work

SX126X (suggested, 1W modules will provide decent coverage for APRS, stable frequency suitable for < 125 kHz BW at 433 MHz, 5V from USB power bank is enough to power it, has additional LNA)
- 👍 E22-400M30S (SX1268)
- E220-400M30S (LLCC68) BW125 SF from 7 to 9 (chip limitations)
- These modules are 30dbm modules, but maximum power should be set to no more than 20-22dbm, see https://github.com/jgromes/RadioLib/wiki/High-power-Radio-Modules-Guide
SX127X (low power, 50-100mW, temperature frequency drift, problematic for narrow band)
- RA-01 (SX1278)
- RA-02 (SX1276)
- TTGO T-Beam (SX1276)

Dependencies

Install via board manager:

Arduino ESP32 (search for esp32): https://github.com/espressif/arduino-esp32
- Use latest 2.0.5+ version, if board manager does not list it then update "Additional boards manager URL" to https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_index.json

Install via libraries:

RadioLib library: https://github.com/jgromes/RadioLib
Arduino Timer library: https://github.com/contrem/arduino-timer
CircularBuffer library: https://github.com/rlogiacco/CircularBuffer
DebugLog library: https://github.com/hideakitai/DebugLog

Development board

Development board schematics, case and antenna models are available under cad and schematics.