OH4 Generic MQTT Thing need help

Setup, Configuration and Use Beginners
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  • Platform information:
    • Hardware: Raspberry Pi 4 4M RAM
    • OS: Openhabian
    • Java Runtime Environment: which java platform is used and what version
    • openHAB version:
  • Issue of the topic:
    I’m trying to connect through MQTT a generic device in my basement, it sends the temperature and humidity, I’m migrating manually from OH2 so I know it works because I’m still using in parallel on another Pi OH2
    Right now I made 2 items, humidity and temperature, I’ve connected it to the Generic thing channels, it is online but the field on the right always says “NULL” I’ve tried subscribing to the post (guitar/humidity) with MQTT fx with my Mac and I see the message coming trough.
    Persistence on items are set to default.
    Anything I have to change to my items so I can see the values?
    I don’t really see anything on the log as it ain’t a problem, I was able to connect my HUE bridge and HUE Lights so I’m not way out on connection but could need help regarding MQTT.
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Without seeing your channel definition and the message coming from your device, we ain’t be able to help.

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Post your code tab contents from the generic mqtt thing.

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Here it is:
UID: mqtt:topic:MQTTBroker:Guitar_Sensor
label: Guitar Sensor
thingTypeUID: mqtt:topic
configuration: {}
bridgeUID: mqtt:broker:MQTTBroker
location: Studio
channels:

  • id: Guitar_Temperature
    channelTypeUID: mqtt:number
    label: Guitar Temperature
    description: “”
    configuration:
    retained: true
    min: 0
    stateTopic: guitar/temperature
    max: 100
  • id: Guitar_Humidity
    channelTypeUID: mqtt:number
    label: Guitar Humidity
    description: “”
    configuration:
    retained: true
    min: 0
    stateTopic: guitar/humidity
    max: 100
5

What does the message payload coming in look like?
That was asked for previously.

1 Like
6

So right now I’m subscribing to “guitar/humidity” with MQTT fx and the message I received is:
44.50

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But what doe it look like?
The whole topic and pay load.
Something like this for example":

stat/brilliantcolour1/RESULT {"POWER":"ON","Dimmer":5,"Color":"040D0000","HSBColor":"100,99,5","White":0,"Channel":[2,5,0,0]}
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OK I think I know where the problem is.
As I’m running 2 OH in parallel, (old system OH2.5 and new OH4) I have 2 Mosquito server running but on different IP address… I will have to flash my humidity/temperature ESP8266 to talk to the new or I’ll force my new OH4 to the same IP address of the old system (by powering down my old OH2.5).

9

you can use more than one broker.

just add another broker to talk to old mqtt server