# Temperature sensor with external probe for Homey

**URL:** <https://community.homey.app/t/temperature-sensor-with-external-probe-for-homey/67587>\
**Category:** Devices\
**Created:** [August 19, 2022, 5:44am UTC](https://community.homey.app/t/temperature-sensor-with-external-probe-for-homey/67587 "2022-08-19T05:44:03Z")\
**Posts on this page:** 11\
**Page:** 1

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**Author:** ![Tomas\_Severa](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/tomas_severa/32/33929_2.png) [@Tomas\_Severa](https://community.homey.app/u/Tomas_Severa)\
**Post date:** [August 19, 2022, 5:44am UTC](https://community.homey.app/t/temperature-sensor-with-external-probe-for-homey/67587/1 "2022-08-19T05:44:03Z")

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Hi, please can anyone help me to find a working temperature sensor with external probe? I need to measure the temperature in a hot water boiler - so it should be able to measure at least 80°C  
Thank you

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**Author:** ![Undertaker](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/undertaker/32/53278_2.png) [@Undertaker](https://community.homey.app/u/Undertaker)\
**Post date:** [August 19, 2022, 9:08am UTC](https://community.homey.app/t/temperature-sensor-with-external-probe-for-homey/67587/2 "2022-08-19T09:08:45Z")

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Measuring range: from -55 ° C to 125 ° C  
27,99 €

[https://shop.intuitech.de/smarthome-systeme-wifi-wlan-sensoren/blebox-tempsensor-temperatursensor-wifi](https://shop.intuitech.de/smarthome-systeme-wifi-wlan-sensoren/blebox-tempsensor-temperatursensor-wifi)

Homey App:

> **[BleBox](https://homey.app/de-de/app/eu.blebox/BleBox/)**
>
> Unique solutions for unique value!

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<div class="post-metadata">

**Author:** ![Tomas\_Severa](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/tomas_severa/32/33929_2.png) [@Tomas\_Severa](https://community.homey.app/u/Tomas_Severa)\
**Post date:** [August 19, 2022, 9:26am UTC](https://community.homey.app/t/temperature-sensor-with-external-probe-for-homey/67587/3 "2022-08-19T09:26:22Z")

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Great thanks

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**Author:** ![DirkG](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/dirkg/32/118897_2.png) [@DirkG](https://community.homey.app/u/DirkG)\
**Post date:** [August 19, 2022, 9:59am UTC](https://community.homey.app/t/temperature-sensor-with-external-probe-for-homey/67587/4 "2022-08-19T09:59:35Z")

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It’s also possible to use a [Fibaro Smart Implant (Z-Wave)](https://manuals.fibaro.com/smart-implant/) or a [Shelly Uni (WiFi)](https://shelly.cloud/products/shelly-uni-smart-home-automation-device/) and connect a DS18B20 temperature sensor.

Advantages (imo):  
– you can choose the length of the probe yourself  
– several DS18B20 sensors can be connected

Disadvantages (imo):  
– these are not plug & play solutions like the Blebox temperature sensor  
– for the Z-Wave radio protocol you need a good developed Z-Wave mesh

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**Author:** ![FKey](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/fkey/32/14793_2.png) [@FKey](https://community.homey.app/u/FKey)\
**Post date:** [August 19, 2022, 11:26am UTC](https://community.homey.app/t/temperature-sensor-with-external-probe-for-homey/67587/5 "2022-08-19T11:26:48Z")

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The shelly 1PM (WIFi) with temp addon is also supported by homey.  
It uses the same sensor DS18B20, upto sensors per shelly

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**Author:** ![Tomas\_Severa](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/tomas_severa/32/33929_2.png) [@Tomas\_Severa](https://community.homey.app/u/Tomas_Severa)\
**Post date:** [September 11, 2022, 3:16pm UTC](https://community.homey.app/t/temperature-sensor-with-external-probe-for-homey/67587/6 "2022-09-11T15:16:47Z")

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Hi Undertaker, i installed the blebox temperature sensor.  
But I am not able to create a flow that works.

I need that WHEN the temperature is under 55°C  
AND the time is between 16 -18 hour  
THEN turn on the kettle.

But it doesn’t work. The temperature become under 55 but the flow doesn’t start  
Any hint?

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**Author:** ![FKey](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/fkey/32/14793_2.png) [@FKey](https://community.homey.app/u/FKey)\
**Post date:** [September 11, 2022, 6:39pm UTC](https://community.homey.app/t/temperature-sensor-with-external-probe-for-homey/67587/7 "2022-09-11T18:39:18Z")

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Please share you flow.

I would build something like:  
WHEN temperature has changed  
AND temperature is below 55c (this is a card of the type logic)  
AND TIME is between 16:00-18:00  
THEN turn on kettle

Also add some [papertrail](https://homey.app/nl-nl/app/nu.dijker.papertrails/PaperTrails-Logboek/) card so you can see what is actually being triggered

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<div class="post-metadata">

**Author:** ![Tomas\_Severa](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/tomas_severa/32/33929_2.png) [@Tomas\_Severa](https://community.homey.app/u/Tomas_Severa)\
**Post date:** [September 12, 2022, 5:43am UTC](https://community.homey.app/t/temperature-sensor-with-external-probe-for-homey/67587/8 "2022-09-12T05:43:09Z")

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Ok will try it. Thank you

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**Author:** ![Undertaker](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/undertaker/32/53278_2.png) [@Undertaker](https://community.homey.app/u/Undertaker)\
**Post date:** [September 12, 2022, 7:00am UTC](https://community.homey.app/t/temperature-sensor-with-external-probe-for-homey/67587/9 "2022-09-12T07:00:13Z")

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> [@FKey](#):
>
> Ich würde so etwas bauen:  
> WENN sich die Temperatur geändert hat  
> UND die Temperatur unter 55 ° C liegt (dies ist eine Karte vom Typ Logik)  
> UND DIE ZEIT zwischen 16:00 und 18:00 liegt ,  
> DANN den Wasserkocher einschalten

👍👍👍👍👍

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<div class="post-metadata">

**Author:** ![DirkG](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/dirkg/32/118897_2.png) [@DirkG](https://community.homey.app/u/DirkG)\
**Post date:** [September 12, 2022, 8:30am UTC](https://community.homey.app/t/temperature-sensor-with-external-probe-for-homey/67587/10 "2022-09-12T08:30:31Z")

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An short explanation why in your use case you have to use the trigger card **The temperature has changed** and not the trigger card **Temperature becomes less than…**.

The trigger card **The temperature has changed** in relation with the corresponding condition card **…is less than…** triggers the flow at **EVERY** temperature change and checks if the condition cards are fulfilled or not (here temperature \< 55 °C AND time between 16 and 18 o’clock). If both conditions are fulfilled, the flow runs completely and the kettle will be turned on.

A flow with the trigger card **Temperature becomes less than…** will **ONLY** be triggered when the temperature drops from more than 55 °C below 55 °C within the time window between 16 and 18 o’clock. If this happens outside the time window, e.g. at 15:58, the flow will not be triggered.

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<div class="post-metadata">

**Author:** ![qawsedrf57](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/qawsedrf57/32/123371_2.png) [@qawsedrf57](https://community.homey.app/u/qawsedrf57)\
**Post date:** [June 9, 2025, 11:42am UTC](https://community.homey.app/t/temperature-sensor-with-external-probe-for-homey/67587/11 "2025-06-09T11:42:26Z")

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are those sensors mentioned in this thread still the best options?

i prefer to go to a zigbee sensor but the only option i could find is a shelly gen 4 module with an addon, wil that work? ore is there a beter/cheaper option to run a tempprobe sensor on zigbee?

now i have a tuya probe sensor on a tuya bridge in a different ecosystem, it works but my knowledge is nog big enoug to get is working on my homey.