Pycom GPS box tries to get some useful data from a Lopy4 and a Pytrack board.
It is written in MicroPython and takes advantage of microGPS, micropython-async and Pycom's LoRa code to be able to send GPS data as a LoRaWAN payload over The Things Network.
It provides a decoder function to use on TTN's backend to be able to read the payload.
Once decoded, the payload will return a JSON string like the following:
{
"gps_data": {
"alt": "606.9",
"dir": "NE",
"lat": "47.27497",
"lon": "11.41830",
"speed": "0.0",
"ts": 1573717150
}
}The code tries to squeeze payload's size as much as it can using MicroPython's ustruct pack and unpack functions on Python's side as well as some bytes shifting on Javascript's side.
The async functions enable to set two different intervals to poll the GPS module and send messages over LoRaWAN.
A more advanced example of uasyncio and GPS polling can be found between micropython-async's examples.
The settings_sample.py provides an example of configuration. It requires the data of a TTN's device configured as ABP to be filled up. The file can then be renamed as settings.py.
The Links file provides a list of references that made writing the code a quick, pleasant, journey for a wannabe Devops.