OH3 MQTT system broker - protocol error, 'Server closed connection without DISCONNECT'

[hafniumzinc (T)]

Perhaps I’m not understanding a nuance here, but why not use the MQTT Broker Thing, instead of the System MQTT Broker Thing? Isn’t System MQTT Broker Thing a relic from when the MQTT Binding shipped with an internal MQTT broker? As OH3 doesn’t ship with this internal MQTT broker anymore, I don’t know what System MQTT Broker does…

[OH3] MQTT Setup and Configuration

Overview In order to use MQTT devices, the following is required: An MQTT broker installed MQTT Binding installed in openHAB MQTT Bridge Thing configured in openHAB This tutorial was written with openHAB3 running on a headless Raspberry Pi 3B with Raspberry Pi OS, with SSH access. Method 1. Install the MQTT broker Install Mosquitto On the Raspberry Pi, perform the following commands to install Mosquitto, and ensure it runs when re-starting the Pi: sudo apt install mosquitto sudo systemc…

Adding Things - Advanced