[SOLVED] Not getting temperature from DS18B20 - Tasmota - Sonoff

Setup, Configuration and Use Items & Sitemaps
1

I have managed to get the SONOFF TH10 to read temperature from the DS18B20 sensor using tasmota.

This is from the Tasmota console:
23:28:51 MQT: tele/stue_temp/SENSOR = {“Time”:“2018-01-19T23:28:51”, “DS18B20”:{“Temperature”:23.9}, “TempUnit”:“C”}

My item is as follows:
Number Stue_Temp “Temperature [%.1f °C]”
{mqtt="<[mosquitto:tele/stue_temp/SENSOR:state:JSONPATH($.DS18B20.Temperature)]"}

My sitemap is as follows:
itemap stue label=“stue” {
Frame label=“Stue” {
Slider item=Dimmer_Stue_TV_Dim
Slider item=Dimmer_Stue_Midt_Dim
Slider item=Dimmer_Stue_Spisebord_Dim
Switch item=Stue_Lys
Switch item=Stue_Temp
Text item=Stue_Temp label=“Temperatur [%.1f °C]” icon=“temperature”
}
}

What am I doing wrong?

2

After this I installed JSONPath Tranformation and restarted openhab. Still not working.

Also tried to delete /var/lib/openhab2/config/org/openhab/mqtt.config and restart. Still nothing.

Log says:

2018-01-20 00:44:53.809 [ERROR] [t.mqtt.internal.MqttBrokerConnection] - MQTT connection to broker was lost
MqttException (0) - java.lang.NoClassDefFoundError: net/minidev/json/writer/JsonReaderI
at org.eclipse.paho.client.mqttv3.internal.CommsCallback.run(CommsCallback.java:197)[197:org.openhab.io.transport.mqtt:1.10.0]
at java.lang.Thread.run(Thread.java:745)[:1.8.0_111]
Caused by: java.lang.NoClassDefFoundError: net/minidev/json/writer/JsonReaderI
at com.jayway.jsonpath.internal.DefaultsImpl.(DefaultsImpl.java:17)
at com.jayway.jsonpath.internal.DefaultsImpl.(DefaultsImpl.java:15)
at com.jayway.jsonpath.Configuration.getEffectiveDefaults(Configuration.java:48)
at com.jayway.jsonpath.Configuration.defaultConfiguration(Configuration.java:173)
at com.jayway.jsonpath.internal.JsonContext.(JsonContext.java:52)
at com.jayway.jsonpath.JsonPath.read(JsonPath.java:502)
at org.eclipse.smarthome.transform.jsonpath.internal.JSonPathTransformationService.transform(JSonPathTransformationService.java:49)
at org.openhab.core.transform.TransformationHelper$TransformationServiceDelegate.transform(TransformationHelper.java:60)
at org.openhab.binding.mqtt.internal.MqttMessageSubscriber.processMessage(MqttMessageSubscriber.java:138)
at org.openhab.io.transport.mqtt.internal.MqttBrokerConnection.messageArrived(MqttBrokerConnection.java:556)[197:org.openhab.io.transport.mqtt:1.10.0]
at org.eclipse.paho.client.mqttv3.internal.CommsCallback.deliverMessage(CommsCallback.java:475)[197:org.openhab.io.transport.mqtt:1.10.0]
at org.eclipse.paho.client.mqttv3.internal.CommsCallback.handleMessage(CommsCallback.java:379)[197:org.openhab.io.transport.mqtt:1.10.0]
at org.eclipse.paho.client.mqttv3.internal.CommsCallback.run(CommsCallback.java:183)[197:org.openhab.io.transport.mqtt:1.10.0]
… 1 more
Caused by: java.lang.ClassNotFoundException: net.minidev.json.writer.JsonReaderI cannot be found by com.jayway.jsonpath.json-path_2.1.0
at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:439)[org.eclipse.osgi-3.10.101.v20150820-1432.jar:]
at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:352)[org.eclipse.osgi-3.10.101.v20150820-1432.jar:]
at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:344)[org.eclipse.osgi-3.10.101.v20150820-1432.jar:]
at org.eclipse.osgi.internal.loader.ModuleClassLoader.loadClass(ModuleClassLoader.java:160)[org.eclipse.osgi-3.10.101.v20150820-1432.jar:]
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)[:1.8.0_111]
… 14 more
2018-01-20 00:44:53.823 [ERROR] [t.mqtt.internal.MqttBrokerConnection] - MQTT connection to ‘mosquitto’ was lost: MqttException : ReasonCode 0 : Cause : net/minidev/json/writer/JsonReaderI
2018-01-20 00:44:53.824 [INFO ] [t.mqtt.internal.MqttBrokerConnection] - Starting connection helper to periodically try restore connection to broker 'mosquitto’
2018-01-20 00:45:03.825 [INFO ] [t.mqtt.internal.MqttBrokerConnection] - Starting MQTT broker connection ‘mosquitto’

3

SOLVED:
Deleted /var/lib/openhab2/config/org/openhab/mqtt.config
Uninstalled binding mqtt.
Restarted Openhab
Installed mqtt addon.