Tag Archives: GPS Tracker

GT06E GPS Tracker Part 2: Establishing connection

This is a continuation from Part 1.

As of writing this I already had complete solution (as far as getting tracking data is concerned), a multi-process TCP server with a mysql database back-end.
The server code itself is not pretty thus I am cautious about sharing it at this stage (I will “open-source” it once I cleaned it up).

One caveat: my solution does not support batch mode (where the payload contain multiple concatenated location and other packets).

The assumption is that the reader is somewhat familiar with python and sockets.

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GT06E GPS Tracker Part 1: Implementing communication protocol – WTF is CRC-ITU???

Preamble:

As an experiment I bought a relatively cheap GPS tracker that supported 3G (most of them at the time were 2G only).
After quick google search I found a suitable model GT06E from Concox.

The idea was I would implement my own server, as I do not trust 3rd party GPS tracking services (who would?), especially free ones ;).

I did not realise at the time what a mess the protocol is.
The “engineers” who wrote the spec for the protocol are crazy! They reinvented the wheel, which instead of tyre utilizes boots.

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