# \[solved\] Openhab 3 unable to discover mqtt things with auto discovery **URL:** \ **Category:** Beginners\ **Tags:** mqtt-binding, homeassistant, openhab3\ **Created:** [January 15, 2021, 3:45pm UTC](https://community.openhab.org/t/solved-openhab-3-unable-to-discover-mqtt-things-with-auto-discovery/114254 "2021-01-15T15:45:08Z")\ **Posts on this page:** 15\ **Page:** 1
**Author:** ![Mario\_Almeida](https://community.openhab.org/letter_avatar_proxy/v4/letter/m/c57346/32.png) [@Mario\_Almeida](https://community.openhab.org/u/Mario_Almeida)\ **Post date:** [January 15, 2021, 3:45pm UTC](https://community.openhab.org/t/solved-openhab-3-unable-to-discover-mqtt-things-with-auto-discovery/114254/1 "2021-01-15T15:45:08Z")
Hi All, I am using homeassistant standard as below, and manually publishing the topic, but OH3 is unable to discover anything, even if I click the scan button, it is not able to find it. > homeassistant/binary\_sensor/253/pir/config Logs: > 19:34:54.214 [DEBUG] [.core.karaf.internal.FeatureInstaller] - Running scheduled sync job > 19:35:53.253 [DEBUG] [internal.DiscoveryServiceRegistryImpl] - Trying to start 2 scans with an aggregating listener. > 19:35:53.255 [DEBUG] [internal.DiscoveryServiceRegistryImpl] - Triggering scan for thing types ‘[mqtt:systemBroker, mqtt:broker]’ on ‘MqttServiceDiscoveryService’… > 19:35:53.256 [DEBUG] [internal.DiscoveryServiceRegistryImpl] - Finished 1 of 2 discovery services. > 19:35:53.257 [DEBUG] [internal.DiscoveryServiceRegistryImpl] - Triggering scan for thing types ‘[mqtt:homie300]’ on ‘Homie300Discovery’… > 19:35:53.258 [DEBUG] [internal.DiscoveryServiceRegistryImpl] - Finished 2 of 2 discovery services. > 19:35:53.259 [DEBUG] [.internal.discovery.DiscoveryResource] - Scan for binding ‘mqtt’ successfully finished. ``` runtimeInfo: version: 3.1.0 buildString: "Build #2143" locale: en_US systemInfo: configFolder: /openhab/conf userdataFolder: /openhab/userdata logFolder: /openhab/userdata/logs javaVersion: 11.0.9 javaVendor: Azul Systems, Inc. javaVendorVersion: Zulu11.43+21-CA osName: Linux osVersion: 5.8.0-38-generic osArchitecture: amd64 availableProcessors: 8 freeMemory: 799574744 totalMemory: 1522532352 bindings: - mqtt clientInfo: device: ios: false android: false androidChrome: false desktop: true iphone: false ipod: false ipad: false edge: false ie: false firefox: false macos: false windows: false cordova: false phonegap: false electron: false nwjs: false webView: false webview: false standalone: false pixelRatio: 1 prefersColorScheme: light isSecureContext: true locationbarVisible: true menubarVisible: true navigator: cookieEnabled: true deviceMemory: 8 hardwareConcurrency: 8 language: en-US languages: - en-US - en onLine: true platform: Linux x86_64 screen: width: 1920 height: 1080 colorDepth: 24 support: touch: false pointerEvents: true observer: true passiveListener: true gestures: false intersectionObserver: true themeOptions: dark: light filled: true pageTransitionAnimation: default bars: filled homeNavbar: default homeBackground: default expandableCardAnimation: default userAgent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.141 Safari/537.36 timestamp: 2021-01-15T15:44:26.212Z ``` ---
**Author:** ![hafniumzinc](https://community.openhab.org/letter_avatar_proxy/v4/letter/h/b9bd4f/32.png) [@hafniumzinc](https://community.openhab.org/u/hafniumzinc)\ **Post date:** [January 15, 2021, 3:46pm UTC](https://community.openhab.org/t/solved-openhab-3-unable-to-discover-mqtt-things-with-auto-discovery/114254/2 "2021-01-15T15:46:14Z")
Do you have the JINJA and JSONPATH Transformation Services installed? ---
**Author:** ![Mario\_Almeida](https://community.openhab.org/letter_avatar_proxy/v4/letter/m/c57346/32.png) [@Mario\_Almeida](https://community.openhab.org/u/Mario_Almeida)\ **Post date:** [January 15, 2021, 3:50pm UTC](https://community.openhab.org/t/solved-openhab-3-unable-to-discover-mqtt-things-with-auto-discovery/114254/3 "2021-01-15T15:50:23Z")
Yes, ![image](https://community-openhab-org.s3.dualstack.eu-central-1.amazonaws.com/original/3X/7/f/7fd52717cf1a6c7744fc95b8f5488cf8517498af.png) > 233 │ Active │ 75 │ 3.1.0.202101150350 │ openHAB Add-ons :: Bundles :: Transformation Service :: Jinja > 235 │ Active │ 75 │ 3.1.0.202101150350 │ openHAB Add-ons :: Bundles :: Transformation Service :: JSonPath ---
**Author:** ![rlkoshak](https://community.openhab.org/user_avatar/community.openhab.org/rlkoshak/32/75251_2.png) [@rlkoshak](https://community.openhab.org/u/rlkoshak)\ **Post date:** [January 15, 2021, 4:18pm UTC](https://community.openhab.org/t/solved-openhab-3-unable-to-discover-mqtt-things-with-auto-discovery/114254/4 "2021-01-15T16:18:50Z")
There is a toggle on the MQTT Broker thing to enable/disable autodiscovery. Is autodiscovery turned on? ---
**Author:** ![Mario\_Almeida](https://community.openhab.org/letter_avatar_proxy/v4/letter/m/c57346/32.png) [@Mario\_Almeida](https://community.openhab.org/u/Mario_Almeida)\ **Post date:** [January 15, 2021, 4:23pm UTC](https://community.openhab.org/t/solved-openhab-3-unable-to-discover-mqtt-things-with-auto-discovery/114254/5 "2021-01-15T16:23:06Z")
Yes, > UID: mqtt:broker:gateway > label: MQTT Gateway > thingTypeUID: mqtt:broker > configuration: > lwtQos: 0 > publickeypin: true > clientID: openhab > keepAlive: 60 > qos: 0 > reconnectTime: 60000 > port: 1883 > host: 192.168.1.101 > secure: false > certificatepin: true > lwtRetain: true > enableDiscovery: true > location: Workshop Here are the logs If I manually create HomeAssistant MQTT Component > 20:19:04.833 [TRACE] [o.transport.mqtt.MqttBrokerConnection] - subscribeRaw message consumer for topic ‘homeassistant/sensor/253/temperature/state’ from broker ‘192.168.1.101’ > 20:19:04.837 [TRACE] [o.transport.mqtt.MqttBrokerConnection] - Successfully subscribed to topic homeassistant/sensor/253/temperature/state > 20:19:04.838 [DEBUG] [hab.binding.mqtt.generic.ChannelState] - Subscribed channel mqtt:homeassistant:gateway:7f7891901f:253\_5Ftemperature\_5Fsensor#sensor to topic: homeassistant/sensor/253/temperature/state > 20:19:31.863 [TRACE] [assistant.internal.DiscoverComponents] - Found HomeAssistant thing temperature component sensor But not via auto-discovery. ---
**Author:** ![rlkoshak](https://community.openhab.org/user_avatar/community.openhab.org/rlkoshak/32/75251_2.png) [@rlkoshak](https://community.openhab.org/u/rlkoshak)\ **Post date:** [January 15, 2021, 4:49pm UTC](https://community.openhab.org/t/solved-openhab-3-unable-to-discover-mqtt-things-with-auto-discovery/114254/6 "2021-01-15T16:49:30Z")
Either this is a bug or you have to manually create the HomeAssistant Things like your log seems to indicate. It does say that it “Found HomeAssistant thing” so there is some sort of discovery going on. You wouldn’t see those logs if you created a Generic MQTT Thing. ---
**Author:** ![Mario\_Almeida](https://community.openhab.org/letter_avatar_proxy/v4/letter/m/c57346/32.png) [@Mario\_Almeida](https://community.openhab.org/u/Mario_Almeida)\ **Post date:** [January 15, 2021, 5:04pm UTC](https://community.openhab.org/t/solved-openhab-3-unable-to-discover-mqtt-things-with-auto-discovery/114254/7 "2021-01-15T17:04:20Z")
No, I did not create the Generic MQTT Think. but HomeAssistant MQTT Component as below. ![image](https://community-openhab-org.s3.dualstack.eu-central-1.amazonaws.com/original/3X/b/5/b5613449a483e456557384d8488bb4a8acf9d2e4.png) ![image](https://community-openhab-org.s3.dualstack.eu-central-1.amazonaws.com/original/3X/5/4/541c103026f7312275158a311e9a51f0b4b76e8e.png) ![image](https://community-openhab-org.s3.dualstack.eu-central-1.amazonaws.com/original/3X/8/8/88a5581e7db426ce66025568a1f0335b3c1f4602.png) ---
**Author:** ![rlkoshak](https://community.openhab.org/user_avatar/community.openhab.org/rlkoshak/32/75251_2.png) [@rlkoshak](https://community.openhab.org/u/rlkoshak)\ **Post date:** [January 15, 2021, 5:06pm UTC](https://community.openhab.org/t/solved-openhab-3-unable-to-discover-mqtt-things-with-auto-discovery/114254/8 "2021-01-15T17:06:26Z")
So, did you create the Broker Thing? ---
**Author:** ![Mario\_Almeida](https://community.openhab.org/letter_avatar_proxy/v4/letter/m/c57346/32.png) [@Mario\_Almeida](https://community.openhab.org/u/Mario_Almeida)\ **Post date:** [January 15, 2021, 5:15pm UTC](https://community.openhab.org/t/solved-openhab-3-unable-to-discover-mqtt-things-with-auto-discovery/114254/9 "2021-01-15T17:15:56Z")
Yes, below rite? Or, is it something else? ![image](https://community-openhab-org.s3.dualstack.eu-central-1.amazonaws.com/original/3X/d/5/d5f3a55b490864237ce6e65b3fb0aed039889386.png) ``` UID: mqtt:broker:gateway label: MQTT Gateway thingTypeUID: mqtt:broker configuration: lwtQos: 0 publickeypin: true clientID: openhab2.5 keepAlive: 60 qos: 0 reconnectTime: 60000 port: 1883 host: 192.168.1.101 secure: false certificatepin: true lwtRetain: true enableDiscovery: true location: Workshop ``` ---
**Author:** ![Mario\_Almeida](https://community.openhab.org/letter_avatar_proxy/v4/letter/m/c57346/32.png) [@Mario\_Almeida](https://community.openhab.org/u/Mario_Almeida)\ **Post date:** [January 15, 2021, 5:53pm UTC](https://community.openhab.org/t/solved-openhab-3-unable-to-discover-mqtt-things-with-auto-discovery/114254/10 "2021-01-15T17:53:29Z")
Issue resolved. ``` sudo systemctl stop openhab.service sudo openhab-cli clean-cache sudo systemctl start openhab.service ``` ---
**Author:** ![guny74](https://community.openhab.org/user_avatar/community.openhab.org/guny74/32/108565_2.png) [@guny74](https://community.openhab.org/u/guny74)\ **Post date:** [January 8, 2023, 11:57am UTC](https://community.openhab.org/t/solved-openhab-3-unable-to-discover-mqtt-things-with-auto-discovery/114254/11 "2023-01-08T11:57:01Z")
> [@Mario\_Almeida](#): > > `clean-cache` I have the same issue, but running docker…there `systemctl` does not exists… Any idea so soöve this at Docker ? ---
**Author:** ![rlkoshak](https://community.openhab.org/user_avatar/community.openhab.org/rlkoshak/32/75251_2.png) [@rlkoshak](https://community.openhab.org/u/rlkoshak)\ **Post date:** [January 8, 2023, 5:57pm UTC](https://community.openhab.org/t/solved-openhab-3-unable-to-discover-mqtt-things-with-auto-discovery/114254/12 "2023-01-08T17:57:01Z")
So the container. Delete the contents of the cache and temp folders under the userdata. Restart the container. ---
**Author:** ![guny74](https://community.openhab.org/user_avatar/community.openhab.org/guny74/32/108565_2.png) [@guny74](https://community.openhab.org/u/guny74)\ **Post date:** [January 8, 2023, 7:47pm UTC](https://community.openhab.org/t/solved-openhab-3-unable-to-discover-mqtt-things-with-auto-discovery/114254/13 "2023-01-08T19:47:49Z")
Thank you, …but this did not solve my problem with the “auto discovery” for zigbee2mqtt.. Any Idea ? ---
**Author:** ![rlkoshak](https://community.openhab.org/user_avatar/community.openhab.org/rlkoshak/32/75251_2.png) [@rlkoshak](https://community.openhab.org/u/rlkoshak)\ **Post date:** [January 8, 2023, 11:24pm UTC](https://community.openhab.org/t/solved-openhab-3-unable-to-discover-mqtt-things-with-auto-discovery/114254/14 "2023-01-08T23:24:24Z")
I don’t the l use zigbee2mqtt do I’ve no ideas. I know zigbee2mqtt head multiple modes, maybe you are not using one of the discoverable modes. ---
**Author:** ![Fabio\_Pergola](https://community.openhab.org/user_avatar/community.openhab.org/fabio_pergola/32/77867_2.png) [@Fabio\_Pergola](https://community.openhab.org/u/Fabio_Pergola)\ **Post date:** [October 14, 2024, 2:42pm UTC](https://community.openhab.org/t/solved-openhab-3-unable-to-discover-mqtt-things-with-auto-discovery/114254/15 "2024-10-14T14:42:41Z")
hey @Mario_Almeida @guny74 , you guys still using the HA MQTT Binding? im new to Openhab, i setup an MQTT binding, its online: ![image](https://community-openhab-org.s3.dualstack.eu-central-1.amazonaws.com/original/3X/6/b/6bd27e22c7fa7dc1ab95ec5d4511f1bacbdd6c8c.png) in HA, im exposing all light/switch entities to MQTT, i use a seperate base topic “openhab” i see all my lights/switches in MQTT, so for example , i want to add thim item below ![image](https://community-openhab-org.s3.dualstack.eu-central-1.amazonaws.com/original/3X/6/0/60b8341fb443edfaac7181e34ae5382814aa9e0d.png) But its giving me an unknown state ? what am i missing? ![image](https://community-openhab-org.s3.dualstack.eu-central-1.amazonaws.com/original/3X/6/c/6cb5a23ec184195996f22ffef1f4752c84b3c076.png)