FiPy Dev-Kit MQTT Example Code

The example publishes data packets over LTE-M (Cat M1) or NB-IoT network to Telenor Managed IoT Cloud (MIC) using the MQTT protocol.
NB! This code example is for prototyping only. Not for deployment in production.

Prerequisites

Your Pycom FiPy dev-kit contains a Sequans modem. This modem needs to be flashed with firmware for the correct network protocol (LTE-M or NB-IoT). This must be done before you try to connect using the selected network protocol. The Sequans modem is by default flashed for LTE-M, so if you plan to use LTE-M you can skip this step.

Instructions on how to update or flash a different FiPy Sequans modem firmware can be found in the Pycom documentation here: https://docs.pycom.io/tutorials/lte/firmware/

Change Network Protocol

The code will by default use the LTE-M network:

iot = StartIoT(network='lte-m')

To use the NB-IoT network (assuming you have flashed the modem as described in the prerequisites):

iot = StartIoT(network='nb-iot')

Network Related Code Changes

The code in this repository reflects settings for the network in Telenor Norway. If your device will connect to a different network you will have to make some changes in lib/telenor.py:9 to reflect this:

# Network related configuration
BAND = 20            # Telenor NB-IoT band frequency (use band 28 if you are in Finnmark close to the Russian border)
APN = 'telenor.iot'  # Telenor public IoT on 4G APN
EARFCN = 6352        # Telenor E-UTRA Absolute Radio Frequency Channel Number
COPS = 24201         # Telenor Norway MNC-MCC

Notice that since the MQTT broker is operated by Amazon Web Services (AWS) you must use the public Telenor IoT on 4G APN telenor.iot.