Um no. If you are referring to Remote Control Windows PC through IOTLink with MQTT then, as was stated
- HomeAssistant discovery is now supported by MQTT2 binding, make sure it is enabled and you can add the things on the PaperUI inbox
HA has a standard way to structure MQTT topics. IOTBroker follows that standard. When a device or software follows that standard, openHAB can automatically discover the device and create the MQTT Things for you.
Granted it’s an older tutorial but if you just replace “PaperUI” with “MainUI” it still applies.