I finally have my SMETS1 smart meter linked to a device which lets me monitor it myself. I got a Hildebrand CAD which supports local MQTT which was really easy to get set up. I then use telegraf to pull the power reading from MQTT and add them to my influxdb which I then query from grafana. Th...

Mosquitto is an MQTT message broker which has an official docker image. You probably have devices which can publish messages using MQTT (like your electricity smart meter), and want to subscribe to those messages for graphing it using something like telegraf and grafana. The mosquitto_passwd too...