This is an old revision of the document!
Table of Contents
MB7UBA - LoRA APRS Digi/iGate
MB7UBA runs APRS over LoRA, located in Basingstoke, Hampshire (IO91kg).
Frequency: 439.9125 MHz
Bandwidth 125 khz
Spreading Factor (SF): 12
Coding Rate (CR4): 4/5 (ie. enter “5” for the CR4 coding rate)
This is the same frequency and parameters for LoRa based APRS across the UK.
LoRa APRS Background
APRS over LoRA is exactly what it sounds like: Automatic Packet Reporting System (APRS) packets sent using using LoRa radio modulation, instead of the more common FM modulation used in standard APRS.
While packets are still logged via APRS-IS and viewable on common APRS sites like aprs.fi, much more detailed information about LoRa APRS specifically can be found at https://lora-aprs.live/ for devices running the very common CA2RXU firmware (iGate or tracker). This has the added benefit of including signal quality information which is not captured through APRS-IS, and also preserving all activity rather then the de-duplicating of packets that occurs on APRS-IS, so you can see in detail exactly where you're packets went.
Technical
The digi runs on a Lilygo T-Beam v1.2 with an SX1262, and uses the firmware by CA2RXU at https://github.com/richonguzman/LoRa_APRS_iGate. Tracker firmware, also by CA2RXU, for similar boards can be found at https://github.com/richonguzman/LoRa_APRS_Tracker.
