MQTT Broker for shelly, mqtt.nbit.ch, no TLS, Port 1883

Setup, see https://www.laub-home.de/wiki/Eclipse_Mosquitto_Secure_MQTT_Broker_Docker_Installation#Mosquitto_via_Docker_Compose

Create User:
$ docker-compose exec mosquitto mosquitto_passwd -c /mosquitto/config/mosquitto.passwd mqtt


Idea for Python Script:
https://schroederdennis.de/monitoring/tasmota-mqtt-daten-mit-grafana-visualisieren-python-influxdb-script/