Concise example to test the behavior of MicroPython's umqtt.simple against Mosquitto 2.0.11 / 2.0.12.

The reason is to investigate a potential regression with Mosquitto 2.0.12, being more strict wrt. protocol compliance, which apparently breaks umqtt.simple.

See also:

• micropython/micropython-lib#445
• hiveeyes/terkin-datalogger#97

There is a module umqtt.universal, which is derived from umqtt.simple. It is compatible with both MicroPython and CPython.

Install MicroPython:

brew install micropython

Acquire sources:

git clone https://github.com/daq-tools/umqtt-example
cd umqtt-example

Run Mosquitto:

# Version 2.0.11
docker run -it --rm --publish=1883:1883 eclipse-mosquitto:2.0.11 mosquitto -c /mosquitto-no-auth.conf

# Version 2.0.12
docker run -it --rm --publish=1883:1883 eclipse-mosquitto:2.0.12 mosquitto -c /mosquitto-no-auth.conf

Invoke tests, on both CPython and MicroPython:

make test

In order to individually invoke the tests, run:

# CPython
make test-cpython

# MicroPython
make test-micropython