# Door knocker sensor **URL:** \ **Category:** Devices\ **Created:** [June 2, 2025, 8:35pm UTC](https://community.homey.app/t/door-knocker-sensor/137511 "2025-06-02T20:35:51Z")\ **Posts on this page:** 17\ **Page:** 1
**Author:** ![FranklyEpic](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/franklyepic/32/48229_2.png) [@FranklyEpic](https://community.homey.app/u/FranklyEpic)\ **Post date:** [June 2, 2025, 8:35pm UTC](https://community.homey.app/t/door-knocker-sensor/137511/1 "2025-06-02T20:35:51Z")
Good evening. I have a traditional door knocker on my house and its in keeping with the property but my father is never able to hear it. Instead of buying a doorbell i was going to use a sensor on the back of the door to register it. You have to use some force so i think it would work. Does anyone have any hardware suggestions for something that would register the thump/ vibration? Extra points for tips on avoiding it going off every time you open the door. Thanks Nick ---
**Author:** ![Arnt\_Soloy](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/arnt_soloy/32/58318_2.png) [@Arnt\_Soloy](https://community.homey.app/u/Arnt_Soloy)\ **Post date:** [June 2, 2025, 9:33pm UTC](https://community.homey.app/t/door-knocker-sensor/137511/2 "2025-06-02T21:33:05Z")
This one maybe: > **[Knocki - Make Any Surface Smart](https://knocki.com/)** > > Knocki is a smart home device that turns any surface into a gesture-enabled control interface for your favorite functions. Easily control the world around you without voice commands! ---
**Author:** ![Marty\_Spargo](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/marty_spargo/32/127980_2.png) [@Marty\_Spargo](https://community.homey.app/u/Marty_Spargo)\ **Post date:** [June 3, 2025, 3:56am UTC](https://community.homey.app/t/door-knocker-sensor/137511/3 "2025-06-03T03:56:52Z")
Depending on the force of the knock, an Aqara vibration sensor might do the job and it plays nice with Homey. But if it’s a gentle knock I’m afraid it might not detect any vibration. ---
**Author:** ![Rogier\_Verheugen](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/rogier_verheugen/32/77406_2.png) [@Rogier\_Verheugen](https://community.homey.app/u/Rogier_Verheugen)\ **Post date:** [June 3, 2025, 10:58am UTC](https://community.homey.app/t/door-knocker-sensor/137511/4 "2025-06-03T10:58:55Z")
When tapping the link I immediately thought it’s a must have… Then I saw the price 🤑. $156 for 1 device. No way ---
**Author:** ![SunBeech](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/sunbeech/32/111391_2.png) [@SunBeech](https://community.homey.app/u/SunBeech)\ **Post date:** [June 3, 2025, 12:27pm UTC](https://community.homey.app/t/door-knocker-sensor/137511/5 "2025-06-03T12:27:51Z")
Also I wonder whether the Knocki device is more sensitive than the Aqara vibration sensor suggested by @Marty_Spargo. Does anyone have hands-on experience with the Knocki? ---
**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:** [June 3, 2025, 12:27pm UTC](https://community.homey.app/t/door-knocker-sensor/137511/6 "2025-06-03T12:27:53Z")
> [@Rogier\_Verheugen](#): > > $156 for 1 device ![image](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/2/5/257c1eb3c594e6bbaaa0ed20c3258809c3b43ce6.png) 111,90 € / approx. 128 $ incl. shipping to Germany. But of course, still far too expensive. * * * @FranklyEpic, there are some Homey compatible vibration sensor available. However, I don’t know if these sensors are really suitable for this use case, because I guess it depends also on the intensity of the door vibration.. - Aqara Vibration Sensor (Zigbee) → [App Store Link](https://homey.app/a/com.xiaomi-mi) / [Official Aqara Webpage](https://www.aqara.com/en/product/vibration-sensor/) Note: Just the “old” vibration sensor is supported, not the new T1! - Fibaro Motion Sensor (Z-Wave) → [App Store Link](https://homey.app/a/com.fibaro) / [Official Fibaro Webpage](https://www.fibaro.com/en/products/motion-sensor/) Note: The sensor is primarily a motion sensor, of course, but it can also detect vibrations. - Frient Vibration Sensor (Zigbee) → [App Store Link](https://homey.app/a/com.frient) Note: Didn’t found the sensor on their webpage, maybe the sensor is only available in certain regions. But I found it in online stores. - ThirdReality Vibration Sensor (Zigbee) → [App Store Link](https://homey.app/a/com.thirdreality.app) / [Official ThirdReality Webpage](https://3reality.com/product/vibration-sensor/) All Apps are compatible with Homey Bridge and Homey Pro. (I mentioned it on purpose because you didn’t mention which homey you use… 🤷‍♂️) > [@FranklyEpic](#): > > Extra points for tips on avoiding it going off every time you open the door. In combination with a door/window sensor and a timer app (only possible with Homey Pro), I guess it will be not that problem. Btw, I assume that the false alarm problem occurs when the door is closed, which causes stronger vibrations than when the door is opened. **When…** _– The vibration alarm turned on_ **And…** _– The contact alarm is off_ **Or…** _– The timer is not running_ **Then…** _– Turn light on / Let the light flash_ _– Start timer for e.g. 2 minutes_ If the door remains open for longer than the duration of the timer and is then closed, a false alarm could possibly be triggered. You may also use a motion sensor to monitor the entrance area. Only if no movement is detected and the vibration sensor detects vibrations, then… So nobody will be able to offer you a solution that works one hundred percent, you will have to test things out yourself. ---
**Author:** ![Rogier\_Verheugen](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/rogier_verheugen/32/77406_2.png) [@Rogier\_Verheugen](https://community.homey.app/u/Rogier_Verheugen)\ **Post date:** [June 3, 2025, 12:35pm UTC](https://community.homey.app/t/door-knocker-sensor/137511/7 "2025-06-03T12:35:45Z")
I just wrote them an email if there is a possibility to to make an integration with Homey. By Knocki, Homey or by a developer in the community. See if they respond ---
**Author:** ![SunBeech](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/sunbeech/32/111391_2.png) [@SunBeech](https://community.homey.app/u/SunBeech)\ **Post date:** [June 3, 2025, 12:43pm UTC](https://community.homey.app/t/door-knocker-sensor/137511/8 "2025-06-03T12:43:14Z")
👍 It seems that this device works on WiFi and batteries. Typically that combination means a relatively short battery life. Though aan add-on module is available, at an extra cost, to connect it to USB power. ---
**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:** [June 3, 2025, 12:46pm UTC](https://community.homey.app/t/door-knocker-sensor/137511/9 "2025-06-03T12:46:36Z")
Acc. to their webpage, it’s possible to communicate via HTTP requests ([Link](https://support.knocki.com/hc/en-us/articles/360061197354-HTTP-Requests)). But because I have no programming / informatics skills, I can’t say if it would work without an extra Homey app. I guess with the [HTTP request flow cards](https://homey.app/a/com.internet) App it should work, but this app isn’t supported by HP23. ---
**Author:** ![Peter\_Kawa](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/peter_kawa/32/173848_2.png) [@Peter\_Kawa](https://community.homey.app/u/Peter_Kawa)\ **Post date:** [June 3, 2025, 2:11pm UTC](https://community.homey.app/t/door-knocker-sensor/137511/10 "2025-06-03T14:11:09Z")
> [@DirkG](#): > > I guess with the [HTTP request flow cards](https://homey.app/a/com.internet) App it should work, but this app isn’t supported by HP23. FYI Dirk, and other readers, the ‘Knocki’ should send a webhook to Homey. No need for apps: `https://webhook.homey.app/your_homey_id/my_event?tag=my_tag` Local: `http://my_homey_ip/webhook?event=my_event&tag=my_tag` This webhook can be “catched” with this logic trigger card ![1000049657](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/2/0/20118cb23e6f8f69dfc391f6f3b869f0147a3e1b.jpeg) ---
**Author:** ![Rogier\_Verheugen](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/rogier_verheugen/32/77406_2.png) [@Rogier\_Verheugen](https://community.homey.app/u/Rogier_Verheugen)\ **Post date:** [June 3, 2025, 2:41pm UTC](https://community.homey.app/t/door-knocker-sensor/137511/11 "2025-06-03T14:41:21Z")
Thanks Peter. Next month I’m in the states. I will try to find one cheaper than @DirkG suggested. Otherwise I will try dirk’s suggestion. I need to convince the wife though. Normall I click my fingers I order to bring me my bear. For free ---
**Author:** ![SunBeech](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/sunbeech/32/111391_2.png) [@SunBeech](https://community.homey.app/u/SunBeech)\ **Post date:** [June 3, 2025, 2:50pm UTC](https://community.homey.app/t/door-knocker-sensor/137511/12 "2025-06-03T14:50:03Z")
> [@Rogier\_Verheugen](#): > > I need to convince the wife though. Normall I click my fingers I order to bring me my bear. For free I assume you mean 🍺… 😅. ---
**Author:** ![Rogier\_Verheugen](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/rogier_verheugen/32/77406_2.png) [@Rogier\_Verheugen](https://community.homey.app/u/Rogier_Verheugen)\ **Post date:** [June 3, 2025, 3:13pm UTC](https://community.homey.app/t/door-knocker-sensor/137511/13 "2025-06-03T15:13:50Z")
🤣 🤣 I do. ![image](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/a/5/a5dfc48cf125366aa9a94c3491bf065b7ec32e8f.png) ---
**Author:** ![FranklyEpic](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/franklyepic/32/48229_2.png) [@FranklyEpic](https://community.homey.app/u/FranklyEpic)\ **Post date:** [June 3, 2025, 3:47pm UTC](https://community.homey.app/t/door-knocker-sensor/137511/14 "2025-06-03T15:47:31Z")
Awesome feedback thank you all. Will check those devices and maybe test the aqara. Thanks again ---
**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:** [June 4, 2025, 9:13am UTC](https://community.homey.app/t/door-knocker-sensor/137511/15 "2025-06-04T09:13:04Z")
The **Knocki** wasn’t my recommendation, and I hadn’t heard of it before either. ---
**Author:** ![Rogier\_Verheugen](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/rogier_verheugen/32/77406_2.png) [@Rogier\_Verheugen](https://community.homey.app/u/Rogier_Verheugen)\ **Post date:** [June 4, 2025, 9:39am UTC](https://community.homey.app/t/door-knocker-sensor/137511/16 "2025-06-04T09:39:11Z")
I know Dirk. I meant the €111,90 suggestion you made in post 6 ---
**Author:** ![Arnt\_Soloy](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/arnt_soloy/32/58318_2.png) [@Arnt\_Soloy](https://community.homey.app/u/Arnt_Soloy)\ **Post date:** [June 15, 2025, 3:08pm UTC](https://community.homey.app/t/door-knocker-sensor/137511/17 "2025-06-15T15:08:59Z")
I bought a used device ($15 ish), and did a basic IFTT test having my Homey 2019 say “door” on 3 knocks.. worked just fine. It has several option regarding integration, like Hue, Alexa etc. but havent tested those. Product seems ok, but as many has mentioned, a new device is expensive.. also it was made like 9 years ago, and limited options on where to buy