# Hard Head Doorbell (Jula) 433Mhz

**URL:** <https://community.homey.app/t/hard-head-doorbell-jula-433mhz/126471>\
**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:** 1\
**Showing post:** 2

<div class="post-metadata">

**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")

</div>

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…

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