# Help needed recording 433Mhz signal : signal recording picks up wrong devices

**URL:** <https://community.homey.app/t/help-needed-recording-433mhz-signal-signal-recording-picks-up-wrong-devices/54737>\
**Category:** Developers\
**Tags:** app, rf-433\
**Created:** [November 12, 2021, 9:13pm UTC](https://community.homey.app/t/help-needed-recording-433mhz-signal-signal-recording-picks-up-wrong-devices/54737 "2021-11-12T21:13:48Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![VanGilles](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/vangilles/32/11478_2.png) [@VanGilles](https://community.homey.app/u/VanGilles)\
**Post date:** [November 12, 2021, 9:13pm UTC](https://community.homey.app/t/help-needed-recording-433mhz-signal-signal-recording-picks-up-wrong-devices/54737/1 "2021-11-12T21:13:48Z")

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Hello,

I am trying to build my first own app by capturing messages from a 433Mhz rainsensor.  
So I tried to make use of the 433Mhz recording option in the developer tools as a base to make a signal definition for my new to build app.

At first it looked good because I received a signal and I thought it was the rainsensor and checked the signal in the GTwave analyser app. Hmmm, looked a bit strange as a sort of continious hearthbeat pulse signal, but heck what do I know about what I am doing…😉

Then I dropped out my batteries of my rainsensor and still received a signal. That’s strange and makes decoding my rainsensor a lot more difficult. So I tried to move the homey to another place in my house in hope it wouldn’t receive other signals so that I could record a clean signal but unfortunately without luck.

Do any of you have experience or tips for me to capture a clean signal to start decoding and building up signal definition file for my app?

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**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:** [November 12, 2021, 11:16pm UTC](https://community.homey.app/t/help-needed-recording-433mhz-signal-signal-recording-picks-up-wrong-devices/54737/2 "2021-11-12T23:16:45Z")

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The one thing I can think of: move Homey even further (outside even).  
Power Homey using an extension cord, or by using a powerbank, and find a location with the least possible chance of unwanted 433MHz signals by trial.

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**Author:** ![Russell\_S](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/russell_s/32/45779_2.png) [@Russell\_S](https://community.homey.app/u/Russell_S)\
**Post date:** [November 12, 2021, 11:39pm UTC](https://community.homey.app/t/help-needed-recording-433mhz-signal-signal-recording-picks-up-wrong-devices/54737/3 "2021-11-12T23:39:52Z")

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Your neighbours might have some gear that interferes…

433mhz can travel some distance. I’d probably recommend take it to a friends house.