MQTT connection error

Setup, Configuration and Use Beginners
1

I am getting this error
[.MqttBrokerConnectionServiceInstance] - MqttBroker connection configuration faulty: host : You need to provide a hostname/IP!

This is my mqtt.cfg. What am I doing wrong? I created this file using vi editor

pid:org.openhab.mqtt
broker.url=tcp://192.168.0.30:1883
broker.clientId=openHab

2

Do you have MQTT binding 2.x installed or 1.x? mqtt.config can only be used in connection with the (legacy) 1.x binding. Check in PaperUI under Bindings which version you have installed.

1 Like
3

I have 2.4

4

You shouldn’t need the mqtt.cfg for the 2.x binding. BTW the cfg files are auto created when you install a binding that can be configured you should never have to create this yourself.

5

So use PaperUI to configure it, not a MQTT.cfg text file.

6

Delete the mqtt.cfg file, if you want to use text files then use the example below to create a things file. Change the names to suit your needs. The things below the Bridge are a sonoff basic with temp and humidity reading.

mqtt.things

Bridge mqtt:broker:pibroker "pibroker" [ host="192.168.0.30", port=1883, secure=false, username="your_name", password="your_password" ]
{
    // Sonoffs
    Thing topic sonoff11 "Sonoff11" @ "Living Room" {
    Channels:
        Type switch : power       "Power"         [ stateTopic="stat/sonoff11/POWER", commandTopic="cmnd/sonoff11/POWER" ]
        Type number : temperature "Temperature"   [ stateTopic="tele/sonoff11/SENSOR", transformationPattern="JSONPATH:$.SI7021.Temperature" ]
        Type number : humidity    "Humidity"      [ stateTopic="tele/sonoff11/SENSOR", transformationPattern="JSONPATH:$.SI7021.Humidity" ]
    }
}

For the items file:
mqtt.items

Switch LivingRoom_Light "Living Room Light" <light>  ["Lighting"] { channel="mqtt:topic:pibroker:sonoff11:power" }
Number LivingRoom_Light_Temp "Temperature [%.1f °F]"      <temp>             { channel="mqtt:topic:pibroker:sonoff11:temperature" }
Number LivingRoom_Light_Humidity    "Humidity [%.1f %%]"    <humidity>       { channel="mqtt:topic:pibroker:sonoff11:humidity" }

If your using something other than a sonoff or have questions about how to configure the file post what your using.

7

Thanks. Finally redid the entire installation and did using PaperUI and now it seems working. Thanks for the help.
Now let me start with more stuff than just a switch.
I want to do a water level monitor using ultrasonic sensor. Any useful project links?