# DHT - 22 temp/humidity sensor node quit working

**URL:** <https://discourse.nodered.org/t/dht-22-temp-humidity-sensor-node-quit-working/27338>\
**Category:** General\
**Created:** [27 May 2020 00:30 UTC](https://discourse.nodered.org/t/dht-22-temp-humidity-sensor-node-quit-working/27338 "2020-05-27T00:30:49Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![jasrob222](https://avatars.discourse-cdn.com/v4/letter/j/91b2a8/32.png) [@jasrob222](https://discourse.nodered.org/u/jasrob222)\
**Post date:** [27 May 2020 00:30 UTC](https://discourse.nodered.org/t/dht-22-temp-humidity-sensor-node-quit-working/27338/1 "2020-05-27T00:30:49Z")

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My DHT-22 sensor quit working on my previously working flow. Is there any fix for this problem?

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**Author:** ![gerry](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/gerry/32/21604_2.png) [@gerry](https://discourse.nodered.org/u/gerry)\
**Post date:** [27 May 2020 02:11 UTC](https://discourse.nodered.org/t/dht-22-temp-humidity-sensor-node-quit-working/27338/2 "2020-05-27T02:11:25Z")

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Not a lot to go on here. Are you sure your sensor is good? Do you have the means to bench test it? Wiring good? Did it fail completely spontaneously or intermittently? Any thing else hinky in the system? Wired screen “ things “ happening otherwise? Nothing else strange?

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**Author:** ![jasrob222](https://avatars.discourse-cdn.com/v4/letter/j/91b2a8/32.png) [@jasrob222](https://discourse.nodered.org/u/jasrob222)\
**Post date:** [27 May 2020 02:36 UTC](https://discourse.nodered.org/t/dht-22-temp-humidity-sensor-node-quit-working/27338/3 "2020-05-27T02:36:38Z")

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I think it's the last Raspberry pi update. The sensor is good and it is wired the same as when it was working.

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**Author:** ![Colin](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/colin/32/17040_2.png) [@Colin](https://discourse.nodered.org/u/Colin)\
**Post date:** [27 May 2020 10:27 UTC](https://discourse.nodered.org/t/dht-22-temp-humidity-sensor-node-quit-working/27338/4 "2020-05-27T10:27:59Z")

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In a terminal run  
`node-red-stop`  
`node-red-start`  
and check the log for anything unusual. Post it here if not sure.

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**Author:** ![system](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/1X/d073cd938eafa2e558d7c2cd59003b3ef4963033.png) [@system](https://discourse.nodered.org/u/system)\
**Post date:** [26 July 2020 10:28 UTC](https://discourse.nodered.org/t/dht-22-temp-humidity-sensor-node-quit-working/27338/5 "2020-07-26T10:28:00Z")

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Closed on 26 July 2020 10:28 UTC

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