# MQTT Node-Red light "state" "ON/OFF"

**URL:** <https://discourse.nodered.org/t/mqtt-node-red-light-state-on-off/80023>\
**Category:** General\
**Tags:** mqtt\
**Created:** [23 July 2023 16:02 UTC](https://discourse.nodered.org/t/mqtt-node-red-light-state-on-off/80023 "2023-07-23T16:02:44Z")\
**Posts on this page:** 6\
**Page:** 1

<div class="post-metadata">

**Author:** ![EcarDK](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/ecardk/32/76058_2.png) [@EcarDK](https://discourse.nodered.org/u/EcarDK)\
**Post date:** [23 July 2023 16:02 UTC](https://discourse.nodered.org/t/mqtt-node-red-light-state-on-off/80023/1 "2023-07-23T16:02:44Z")

</div>

Hallo all

I cant get my light to turn on and off.

My MQTT Broker are connected, and I use MQTT Explorer to see the lamps mqtt topic. zigbee2mqtt/Lille PH Lampe

here are my simple flow  
[flows.json](https://discourse.nodered.org/uploads/short-url/gTT5GM3867Y7NOpVvgsVfocQkKE.json) (1.8 KB)

```auto
[{"id":"78056ff7a3ad8df8","type":"tab","label":"Flow 7","disabled":false,"info":"","env":[]},{"id":"e54fdfffe9db6130","type":"mqtt out","z":"78056ff7a3ad8df8","name":"Lille PH Lampe","topic":"zigbee2mqtt/Lille PH Lampe","qos":"","retain":"","respTopic":"","contentType":"","userProps":"","correl":"","expiry":"","broker":"711011c119463c3b","x":660,"y":240,"wires":[]},{"id":"25f602b71e7c4dc2","type":"inject","z":"78056ff7a3ad8df8","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"","payloadType":"date","x":240,"y":200,"wires":[["2f1ad3b70c8d69bb"]]},{"id":"2f1ad3b70c8d69bb","type":"change","z":"78056ff7a3ad8df8","name":"ON","rules":[{"t":"set","p":"payload","pt":"msg","to":"{\"state\":\"ON\"}","tot":"jsonata"}],"action":"","property":"","from":"","to":"","reg":false,"x":430,"y":200,"wires":[["e54fdfffe9db6130"]]},{"id":"90ea93243bc02ae5","type":"change","z":"78056ff7a3ad8df8","name":"OFF","rules":[{"t":"set","p":"payload","pt":"msg","to":"{\"state\":\"OFF\"}","tot":"jsonata"}],"action":"","property":"","from":"","to":"","reg":false,"x":430,"y":280,"wires":[["e54fdfffe9db6130"]]},{"id":"ad2f7bc33462da99","type":"inject","z":"78056ff7a3ad8df8","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"","payloadType":"date","x":240,"y":280,"wires":[["90ea93243bc02ae5"]]},{"id":"711011c119463c3b","type":"mqtt-broker","name":"MQTT Broker","broker":"192.168.1.106","port":"1883","clientid":"","autoConnect":true,"usetls":false,"protocolVersion":"4","keepalive":"60","cleansession":true,"birthTopic":"","birthQos":"0","birthPayload":"","birthMsg":{},"closeTopic":"","closeQos":"0","closePayload":"","closeMsg":{},"willTopic":"","willQos":"0","willPayload":"","willMsg":{},"userProps":"","sessionExpiry":""}]

```

I use change node to set payload to {"state":"ON"} and {"state":"OFF"}, but the lamp dont changes

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<div class="post-metadata">

**Author:** ![zenofmud](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/zenofmud/32/316_2.png) [@zenofmud](https://discourse.nodered.org/u/zenofmud)\
**Post date:** [23 July 2023 16:15 UTC](https://discourse.nodered.org/t/mqtt-node-red-light-state-on-off/80023/3 "2023-07-23T16:15:02Z")

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Can you point to documentation for the lamp you are using?

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<div class="post-metadata">

**Author:** ![EcarDK](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/ecardk/32/76058_2.png) [@EcarDK](https://discourse.nodered.org/u/EcarDK)\
**Post date:** [23 July 2023 18:05 UTC](https://discourse.nodered.org/t/mqtt-node-red-light-state-on-off/80023/4 "2023-07-23T18:05:10Z")

</div>

its a normal philips hue bulb

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<div class="post-metadata">

**Author:** ![edje11](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/edje11/32/572_2.png) [@edje11](https://discourse.nodered.org/u/edje11)\
**Post date:** [23 July 2023 18:05 UTC](https://discourse.nodered.org/t/mqtt-node-red-light-state-on-off/80023/5 "2023-07-23T18:05:54Z")

</div>

Your topic should end with SET,  
So the mqtt node topic should be `zigbee2mqtt/Lille PH Lampe/set`

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<div class="post-metadata">

**Author:** ![EcarDK](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/ecardk/32/76058_2.png) [@EcarDK](https://discourse.nodered.org/u/EcarDK)\
**Post date:** [23 July 2023 18:07 UTC](https://discourse.nodered.org/t/mqtt-node-red-light-state-on-off/80023/6 "2023-07-23T18:07:49Z")

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edje11

I love you. Now it work 🙂

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<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/1X/d073cd938eafa2e558d7c2cd59003b3ef4963033.png) [@system](https://discourse.nodered.org/u/system)\
**Post date:** [6 August 2023 18:08 UTC](https://discourse.nodered.org/t/mqtt-node-red-light-state-on-off/80023/7 "2023-08-06T18:08:15Z")

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