APRS LoRa

LoRa transmission

• 433.775 MHz
• spreading factor 12
• error coding rate cr4/5
• preamble length: 8
• bandwidth: 125kHz
• sync word: 0x12

data format

• OE_: <0x3c><0xff><0x01>-header and then: destinationcallsign>sourcecallsign:aprsdata
  e.g.: 3c ff 01 50 44 39 46 56 48 31 3e 41 50 52 53 3a 21 35 31 35 38 2e 33 39 4e 2f 30 30 35 34 30 2e 31 38 45 5b 77 77 77 2e 76 61 6e 68 65 75 73 64 65 6e 2e 63 6f 6d
• AX.25 packets

links

ready to use software

• iGate (ESP32): https://github.com/lora-aprs/LoRa_APRS_iGate/
• tracker (ESP32): https://github.com/lora-aprs/LoRa_APRS_Tracker
• gate software for the raspberry pi: https://github.com/folkertvanheusden/lora-aprs-gw
• tracker (ESP8266): https://github.com/folkertvanheusden/ESP8266-LoRa-APRS-Tracker

libraries

raspberry pi

• https://github.com/YandievRuslan/sx1278-LoRa-RaspberryPi

arduino (avr, esp)

• https://github.com/sandeepmistry/arduino-LoRa