@tssk What my issues with it are:

• there is an official binding and installation instruction here on mysensors.org and it does not work reliably
• the ESP8266 Ethernet Gateway Example connected the first time and then stopped working at all
• the ESP8266 MQTT Gateway Example connected the first time and then stopped working at all
• when looking at the MQTT broker, messages do come in, but the official binding (see above) does not register them, does not update the things/items in OpenHAB.

This leads me to the conclusion that the official binding does not handle disconnects very well. Once disconnected, it either takes forever to re-establish a connection or it straight up refuses to work again unless maybe if I rebooted the OpenHAB machine.

When I completely ignore the existence of the official OpenHAB binding that is promoted here as "the" way of connecting to OpenHAB, and instead use a generic MQTT binding, it works like a charm.

I am just confused that the "official" way is so unreliable. I expected this to be the best way. That's why I went for it.