MQTT - How can I control devices on openHAB via Home Assistant?

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Marketplace MQTT Event Bus

Update: Complete rewrite to use the rule templates published to the Marketplace. There is no need to code this or copy/paste code to make this work. There is a Remote openHAB binding which replaces this capability in most cases. See openhab-addons/bundles/org.openhab.binding.remoteopenhab at main · openhab/openhab-addons · GitHub . However there may be use cases where MQTT is preferred, such as integration with a non-openHAB service. Introduction What’s an Event Bus? There are times when one…