can someone recommend a device that I can use my car garage door opener to trigger an event | Home Assistant | Page 1

hoary pike Oct 23, 2025, 10:54 PM

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looking for a device that can receiver garage door remote signals to trigger event

gaunt osprey Oct 23, 2025, 11:07 PM

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hoary pike looking for a device that can receiver garage door remote signals to trigger eve...

is it opening a door already and you want additional things to happen or are you repurposing a device that was designed to open a door?

hoary pike Oct 23, 2025, 11:49 PM

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gaunt osprey is it opening a door already and you want additional things to happen or are you...

I would like to use the additional buttons on the remote to maybe turn on lights that are on a smart switch

gaunt osprey Oct 23, 2025, 11:56 PM

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hoary pike I would like to use the additional buttons on the remote to maybe turn on lights...

ah, I see. so its its got some extra buttons that currently don't do anything that you want to put to use.
what type of connection is it? most of that sort of thing are RF433 I believe.

hoary pike Oct 23, 2025, 11:59 PM

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its a 315mhz freq, thats all i know..

hoary pike Oct 24, 2025, 12:00 AM

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gaunt osprey ah, I see. so its its got some extra buttons that currently don't do anything th...

I think this will kinda work https://a.co/d/j2ZgGMz

for Universal Receiver Security+ 2.0

850LM Universal Receiver is only compatible with remote controls that feature Security+ 2.0 technology. This receiver is compatible with 811LM, 811LMX, 813LM, 813LMX, 891LM, 893LM, 890MAX, 893MAX, 895MAX, 892LT, 894LT remote controls and 877LM, 877MAX, 878LM, 878MAX keypads. Provides convenient a...

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but I would have to tie it in to smarthome, wanted something ready to go

gaunt osprey Oct 24, 2025, 12:02 AM

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thats an extra for a door opener

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ok so 315mhz makes it a little bit more tricky as its less commonly used

hoary pike Oct 24, 2025, 12:03 AM

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I think also 390mhz

gaunt osprey Oct 24, 2025, 12:09 AM

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I am not aware of any "out the box" options.

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you could probably build one if that's something you would be interested in... the above device you linked i guess could be adapted if you monitored the relays states with something. which is also building something.

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there is the RFLink integration that works with devices that can be flashed with the RFLink gateway firmware they have a supported list of devices HERE

so you could look through the device list for something that works with the frequencies you need and is available then flash it and connect it to home assistant. still requires some messing but might be easier?

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you might also be better off finding another way to automate your lights.

hoary pike Oct 24, 2025, 12:31 AM

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gaunt osprey there is the [RFLink integration](https://www.home-assistant.io/integrations/rfl...

RFlink might work but I dont see an pre assembled unit for sale..

hoary pike Oct 24, 2025, 12:36 AM

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gaunt osprey there is the [RFLink integration](https://www.home-assistant.io/integrations/rfl...

I need a Dry contact sensor to integrate into the system , but all i see is dry contact relays.. not sensors

gaunt osprey Oct 24, 2025, 12:38 AM

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hoary pike I need a Dry contact sensor to integrate into the system , but all i see is dry ...

what exactly do you mean? are you talking about a sensor to attach to the dry contact relay of the the thing you linked above?

hoary pike Oct 24, 2025, 12:45 AM

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yes

hoary pike Oct 24, 2025, 12:45 AM

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gaunt osprey what exactly do you mean? are you talking about a sensor to attach to the dry co...

I think the zooz zen17 will do it

gaunt osprey Oct 24, 2025, 12:49 AM

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you can use the shelly i4

power it with live and neutral then also wire live to the COM connectors of the relays and then the NO connectors to the switch inputs. then connect the shelly to home assistant over wifi. on the devices config you will want to set the inputs to type "switch" then you should be able to see the relay states as entities

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there is a DC version of the i4 too. if you prefer to use a DC power supply instead of mains. you wire it the same way. but with positive connected to the commons

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like this

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eek i made a mistake

hoary pike Oct 24, 2025, 12:57 AM

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I get the point, seems like the AC version is half the price of the DC

gaunt osprey Oct 24, 2025, 12:58 AM

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there is no real difference electronically using AC or DC... but DC will be safter to work with.

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personally I would probably lean towards DC for the safety reasons

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https://www.shelly.com/products/shelly-plus-i4-dc

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oh it actually directs you to switch the negatives not positives on the DC version thats interesting. but you get the idea

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also assuming the receiver is powered from a DC supply you can probably power the shelly from the same supply. would need to check but chances are it would be in spec for it.

hoary pike Oct 24, 2025, 1:06 AM

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receiver uses AC or DC, so i can go either way

gaunt osprey Oct 24, 2025, 1:09 AM

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assuming they can both run at same voltage, a DC setup would look like this

hoary pike Oct 24, 2025, 1:09 AM

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ok thats a different relay, the first one you linked was 110v input

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yea, i guess ill go with the DC version

gaunt osprey Oct 24, 2025, 1:10 AM

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the shelly is not a relay but yes thats a DC version

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"Shelly Plus i4 DC "

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the receiver has the relays in it. the shelly i4 just reads their state

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the amazon page you linked doent state the voltage that it can run on but i would imagine its a range that will be within the range of the shelly

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you could also wire switch 4 to the NC connector on relay 3 for completeness. it would just mean the sw4 entity would always be opposite of sw3 or you can disable sw4 entity and ignore it

hoary pike Oct 24, 2025, 1:19 AM

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9-42v DC

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thanks for your help, I think this will work

gaunt osprey Oct 24, 2025, 1:20 AM

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the shelly is 5-24 so anything 9-24 should work for both

#can someone recommend a device that I can use my car garage door opener to trigger an event