# Hard Head Doorbell (Jula) 433Mhz **URL:** \ **Category:** Devices\ **Created:** [January 4, 2025, 7:32am UTC](https://community.homey.app/t/hard-head-doorbell-jula-433mhz/126471 "2025-01-04T07:32:57Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![ernholm](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/ernholm/32/79175_2.png) [@ernholm](https://community.homey.app/u/ernholm)\ **Post date:** [January 4, 2025, 7:32am UTC](https://community.homey.app/t/hard-head-doorbell-jula-433mhz/126471/1 "2025-01-04T07:32:57Z")
Hi! I have a doorbell I’d like to add as a device so I can have notification flows etc to my Homey Pro Late 2023. The doorbell is the following [Trådlös dörrklocka | Upp till 100 meter räckvidd | Hard Head | Jula](https://www.jula.se/catalog/hem-och-hushall/brand-och-sakerhet/overvakning-och-larm/dorrklockor/tradlos-dorrklocka-014152/) which I haven’t found a dedicated app for. I have tried the dev tools to capture the 433Mhz signal but surprisingly this doesn’t seem to work. I capture “something” but it isn’t the same each time and replaying it does not get the chime to work. I have tried adding it as remote to Brel app without any luck as well. Anyone have solved this or have any ideas? The Homey is rather close to the chime and perhaps 7-8m through a floor so the doorbell so range doesn’t seem like an issue. ---
**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:** [January 4, 2025, 10:51pm UTC](https://community.homey.app/t/hard-head-doorbell-jula-433mhz/126471/2 "2025-01-04T22:51:33Z")
You can only use the learned 433MHz signal when you wtite an app for it. Workaround: You can stick a smart vibration sensor to the chime Or > [@Doorbell 433 mhz app developer](https://community.homey.app/t/doorbell-433-mhz-app-developer/123674/4): > > [https://request-a-brand.homey.app](https://request-a-brand.homey.app) is an other new(er) possibility to request apps or device-support. > Make sure to login first Or > [@Doorbell 433 mhz app developer](https://community.homey.app/t/doorbell-433-mhz-app-developer/123674/4): > > Maybe you can write an app yourself, with this tutorial: > [@RF Custom App: Signal (from signal analyzer) sent but not received](https://community.homey.app/t/rf-custom-app-signal-from-signal-analyzer-sent-but-not-received/96917/17): > > For anyone that would be interested in creating an Homey app for their RF device, here is how I processed: have a look at this: [Tuto](https://apps.developer.homey.app/the-basics/getting-started) (Vidéo are helpful) Then use the [Homey Developper Tool](https://tools.developer.homey.app/tools/signals) to register a button of your remote. Then you can use [this tool](http://htmlpreview.github.io/?https://github.com/harriedegroot/Athom-Homey-RF-Signal-Analyzer/blob/master/index.html) made by someone here to make a first analysis of the signal. The goal is to identify the header, the trailer, and the data in the middle, and to compute an average signal (because of noise, each register session will result in a slightly dif… ---
**Author:** ![ernholm](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/ernholm/32/79175_2.png) [@ernholm](https://community.homey.app/u/ernholm)\ **Post date:** [January 5, 2025, 8:38am UTC](https://community.homey.app/t/hard-head-doorbell-jula-433mhz/126471/3 "2025-01-05T08:38:12Z")
Ah, I had assumed that the replay-issue in the dev tools would actually work without properly decoding the signal. I am not above building an app as a project but wanted some way to verify I have the correct signal before spending time building something that doesn’t work anyway 🙂 Could give vibration sensor a try, but one of the use-cases is that the toddler enjoys removing the chime from the power outlet and I’d like to identify when someone pushes the door-bell and there is no chime sound 🙂