This should be simple but I can’t seem to get it to work. I try to send messages from an Arduino + ESP8266 (NodeMcu) to set a switch on the OpenHab server. The Arduino connects to my OpenHab server and publishes MQTT messages. I see the messages from the Arduino with mosquitto_sub on the OpenHab …

Please read over this document on the MQTT binding to see if it helps: http://docs.openhab.org/addons/bindings/mqtt1/readme.html

MQTT reading

Setup, Configuration and Use Beginners

rossko57 (Rossko57) April 14, 2021, 1:03pm 11

I don’t really understand your problem then. What is different about your “reading data” to having an openHAB Item getting state updates from subscribing to an MQTT topic?

Try this