You’ll have to add a transformationPattern
:
Thing mqtt:topic:z2m_house "MQTT: Zigbee 2 MQTT Bridge House" (mqtt:broker:mosquitto) {
Channels:
Type contact : state "State" [
stateTopic="z2m_house/bridge/state",
transformationPattern="JSONPATH:$.state"
off="offline",
on="online"
]
}
And of course JSONPath Transformation has to be installed…