L76micropyGPS

A pytrack L76 class that feeds a micropyGPS object POC. Based on the excellent micropyGPS, that is in turn based on the most excellent tinyGPS++ C++ Ardunio class.

The idea is to take advantage of microPython threading to setup a GPS/GNS system that in the background is constantly updating its data based on the NMEA data is receives, without having to constantly call it to update itself. It does this by having a thread that constantly reads the NMEA sentences from the devices and parses them into GPS/GNS variables so that they can be read by python code.

This allows you to fire up the GPS/GNS pytrack L76 module, go do other things like check other sensors, or setup a WIFI/HTTP[S]/LTE/LoRaWAN connection, then go back and see if you have GPS/GNS data worth using yet.

Intro

• Assumes USB connected Pytrack/Pycom modules (e.g Gpy) to print messages to the console/uart.
• Uses the fabulous microGPS module from https://github.com/inmcm/micropyGPS
• Uses some Pytrack/PySense code from https://github.com/pycom/pycom-libraries/blob/master/pytrack/lib/pytrack.py
• microGPS based on tinyGPS++ https://github.com/mikalhart/TinyGPSPlus

Usage

1. Checkout the repo
2. Flash your device
3. Read the main.py for examples. boot.py does very little bar start a timer for testing and the UART to print them out.

Own usage

Use the main.py code as an example. The print statements can be removed as they are there for memory / displaying to console.

NOTES

Presently the pycoproc code assumes an i2c ID of 0 here; https://github.com/pycom/pycom-libraries/blob/master/lib/pycoproc/pycoproc.py#L78 If you use another i2c device give it an ID above 0! thing.i2c = I2C(C1, foo, bar)

Thanks to tttadam on the pycom forums for spotting; https://forum.pycom.io/topic/3870/pytrack-gps-library/10

Todo

• Add something to stop thread