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We've got one of these monstrosities, which I have loaded micropython onto and can stream the GPS data out to MQTT
To turn this into a tracker we need to get a pure MicroPython version of the LoRa/ThingsNetwork protocol to work.
This only existed in the LoPy libraries or the arduino C++.
It looks like a pure MicroPython version exists.
I'll need help from @ajlennon to get the whole encrypto-chain through to the TTN interface working.
If we get this working, then:
(b) I can revamp the mitems hardware to use the bare ESP32s with the true low-power operation from a battery without the breakout board circuitry, using an adequate LoRa chip, and try deploying it in use cases.