First step on MQTT and openhab

Hi everybody,

I am quite new in the openhab community. Only a few days since I have discovered openhab. First I want to use openhab to see an 1-wire network of temperature sensors that I read now with a Beaglebone ( white ) over a python script and mqtt . I have installed openhab and mosquitto on a Centos 7 computer

in openhab config


my default.items file looks like:

Group All
Group gGroundFloor (All)

Group GF_Living “Living Room” (gGroundFloor)

Number MyFirstSensor “Temperature [%.1f C]” (GF_Living) {mqtt="<[mymosquitto:home/temperature:state:default]"}

my default.sitemap

sitemap default label=“Main Menu”
Frame label=“My First Sensor” {
Text item=MyFirstSensor

in addons folder I have

[root@smallnas addons]# ls -al
total 12
drwxr-xr-x. 2 root root 46 Feb 29 17:53 .
drwxr-xr-x. 14 root root 4096 Feb 29 17:52 …
-rw-r–r--. 1 root root 7590 Feb 1 11:02 org.openhab.action.mqtt-1.8.1.jar

after starting openhab i have in the messages that is subscriberd to mymosquitt mqtt broker .

I am trying now to test :

[root@smallnas ~]# mosquitto_pub -d -t home/temperature -m 20.12
Client mosqpub/7973-smallnas.p sending CONNECT
Client mosqpub/7973-smallnas.p received CONNACK
Client mosqpub/7973-smallnas.p sending PUBLISH (d0, q0, r0, m1, ‘home/temperature’, … (5 bytes))
Client mosqpub/7973-smallnas.p sending DISCONNECT

[root@smallnas ~]# mosquitto_pub -d -t mymosquitto:home/temperature -m 20.12
Client mosqpub/8318-smallnas.p sending CONNECT
Client mosqpub/8318-smallnas.p received CONNACK
Client mosqpub/8318-smallnas.p sending PUBLISH (d0, q0, r0, m1, ‘mymosquitto:home/temperature’, … (5 bytes))
Client mosqpub/8318-smallnas.p sending DISCONNECT

but any value is indicated in openhab UI

If I subscribe in a topic home/temperature

[root@smallnas addons]# mosquitto_sub -d -t home/temperature
Client mosqsub/8749-smallnas.p sending CONNECT
Client mosqsub/8749-smallnas.p received CONNACK
Client mosqsub/8749-smallnas.p sending SUBSCRIBE (Mid: 1, Topic: home/temperature, QoS: 0)
Client mosqsub/8749-smallnas.p received SUBACK
Subscribed (mid: 1): 0
Client mosqsub/8749-smallnas.p received PUBLISH (d0, q0, r0, m0, ‘home/temperature’, … (5 bytes))

Where I am wrong ?

Thank you

You need the binding JAR!

The action JAR provides a publish method to call from rules and scripts, but that’s only useful in the case where you can’t or don’t want to use an item with an MQTT “out binding” string.

Thank you very much ! Working now , I was looking for mqtt in the name and take the first .jar. Without your message I was looking forever :wink:

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