Road Map

Tracker

firmware	completed	feature	payload	compatible with OE5BPA i‑gate
v0.0.0	✓	original OE5BPA tracker	113 bytes	✓
v0.1.0	✓	byte-saving tracker.json	87 bytes	✓
v0.2.0	✓	fork of the OE5BPA tracker with significantly less transmitted bytes	44 bytes	✓
v0.3.0	✓	Base91 compression of location, course and speed data	31 bytes	✓
v0.4.0	✓	removal of the transmitted newline \n character at frame end	30 bytes	✓
v1.0.0	Q3 2023	frame compression	17 bytes	Use the APRS 438 i‑gate!

Note

Currently, the APRS 434 tracker is still compatible with the i-gate developed by Peter Buchegger, OE5BPA.

Important

The release of frame compression will require migration to new frequencies, SF11 and the use of the APRS 438 i‑gate.

Compressed geolocation frames are already flawlessly received by the APRS&438 terminal and being forwarded to APRS‑IS. The release of tracker firmware is kept on hold until the i‑gate firmware gets released.

Terminal

Currently under development.

Ricardo Guzmán Christie, CD2RXU, brought this project in a well advanced stage. Together with Matthias Brändli, HB9EGM, both are now working on the ESP32 Arduino C++ implementation of the text compression algorithm.

I-Gate

Currently under development.

Works, but needs some more attention and care. Manfred Heindl, DC2MH, recently offered Ricardo help with this.