This is a ESP8266 and RFM96 based for low power geolocation tracker. It uses wifi networks for location discovery instead of GPS. Accuracy is not as good as GPS and locations can only be calculated if there is any nearby wifi networks. For location calculation a wifi geolocate service like mozilla or google is needed. The location is not calculated on the device. The small data for calculating the location is send out via LoRaWAN and can then calculated on server. You can use cycle-ttn-wifi as location calculation bridge.
You can find .brd and .sch files (created in eagle) and the ready to use gerber files for the lortinchen-PCB in the hardware folder. More info in README.md in the hardware folder.
The board can be power by two AA batteries.
For LoRaWAN configuration rename config.sample.h to config.h and fill the file with your LoRaWAN device config. Development, configuration, building and flashing can all be done in PlatformIO.
To make the wifi scan more effective, we currently have to patch ESP8266WiFiScan. Call make patch to modify the file in your platformio framework-arduinoespressif8266 - or look into the ESP8266WiFiScan.patch if you want to make the changes yourself.
More on physically flashing firmware at hardware/README.md.
The TTN payload decoder script can be found in ttn-decoder-script.js for TTN Stack V2 or in ttnv3-decoder-script.js if you are using TTN Stack V3.
You can improve coverage of mozillas location service using the mozilla stumbler app for android or by activating location data collection in firefox for android.