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soshial / freematics.md
Last active April 16, 2025 14:30
Freematics + Traccar (integration and configuration)

In this article I listed some common problems I encountered when I tried to use Freematics OBD-reader together with traccar device-tracking server. Both are open-source, thanks to which I was able to improve both and their cooperation.

Freematics: official repo and my fork.

traccar: official repo and my fork.

What are the pitfalls and hardware drawbacks of Freematics?

  1. Currently, Freematics cannot switch between WiFi and SIM depending on connectivity. If you want to switch to a different WiFi or mobile operator - you need to open your bloody Windows and recompile everything :)
  2. Doesn't work at all without external power, has no battery. Works only when connected to USB (3.7V), OBD-II (12V), or SAE J1939 (24V). It me