mqtt-sn
A UDP MQTT-SN library to replace the freematics server.
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- May 2025
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- Apr 2022
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gist.github.com gist.github.com
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if you had a ride in the area with bad network coverage, your route there will have significat gaps; or if you stopped your car in place A with internet, then moved to place B while being offline and then internet appeared in place B, then Freematics will send just ping events (not location data), and Traccar will show that your are still in place A. I will fix so that it will ping server and also transmit latest location.
Good description of the woes these devices have with bad connectivity!
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- Mar 2022
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docs.aws.amazon.com docs.aws.amazon.com
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dt/<application>/<context>/<thing-name>/<dt-type>
Suggested topic structure
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Prefix your MQTT topics to distinguish data topics from command topics
What if topic prefixed by device first? is
device-1/{cmd|data)?
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www.hivemq.com www.hivemq.com
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Useful recipes to design MQTT setups.
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