Mqqt state item

Setup, Configuration and Use Items & Sitemaps
1

  • Platform information:

    • Hardware: Rasperry Pi 3
    • OS: Noobs
    • openjdk version “1.8.0_212”

  • Issue of the topic:
    Hello!
    I’m new to this OH thing, at least at editing files so sorry if my questions seem dumb.
    I want to build an item that reads the state of my sonoff relay but I don’t know what exactly to put in my commands. I tried different codes, but none seems to work. I want to use this state item to work with Webhooks and IFTTT. When someone uses the relay, it triggers a scene through Ifttt.
    I already managed to configure a switch button that works very well on this sonoff, but that doesn’t interest me.

    • Items configuration related to the issue
Switch Sonoff1 "Sonoff_1" { mqtt=">[broker:house/cmnd/house-light-1/power:command:*:default],<[broker:house/stat/house-light-1/power:state:default]" }
//house/cmnd/house-light/POWER -m on
String  State1sonoff "State_1:[%s]" { mqtt="<[broker:house/stat/house-light-1/state:state:default]"}
  • Sitemap configuration related to the issue
sitemap home label="Sonoff Switches" //creez o casa numita Sonoff Switches
{
       Frame label="Camera test"   //creez camera test
       {
               Switch item=Sonoff1     //adaug un itemin camera test
                                      //itemele trebuie create in fisierul .item
               Text item=State1sonoff
       }
}
2

Welcome to the OpenHAB community, excellent first post!

To access an items state, you need

myitem.state

Also helpful is

myitem.state.toString

Sorry I’m on my phone

3

Which version of the MQTT binding do you have installed? If you are on OH 2.4 or later and just installed MQTT then you are almost definitely running the MQTT 2 binding. Your Item syntax is for the MQTT 1 binding. See Using Sonoff Power Switches with Tasmota firmware and openHAB2 MQTT2 binding which should get you started.

4

I uninstalled mqtt binding 2.4 and turned on legacy binding 1.xx. Do you know if my code is correct?

5

Did you configure the binding in mqtt.cfg?

I can’t just look at the code and say whether it is correct or not. Nothing looks wrong but I’m looking at it on my phone and I’m not a computer.

Have you verified that the messages are being published?

Are there errors in the logs?

6

This is the only configuration I made in mqtt.cfg:

# URL to the MQTT broker, e.g. tcp://localhost:1883 or ssl://localhost:8883
#<broker>.url=tcp://<host>:1883
broker.url=tcp://192.168.1.188:1883

The switch button works ok but I don’t want to publish messages, just to subcribe. I want to know when the state is changed manually on the switch. Also I don’t know where to find the logs.

LE:
I got it working by adding new lines in mqtt.cfg

pid:org.openhab.mqtt
broker.clientId=openhab2

And changing the state item to:

String  State1sonoff "State_1:[%s]" { mqtt="<[broker:house/stat/house-light-1/POWER:state:default]"}

I put POWER instead of state.

Thanks guys, I look forward to asking new questions.