seskc1
Posts: 2
Joined: Mon Aug 02, 2021 6:20 pm

Wireless Key fob

Mon Aug 02, 2021 7:43 pm

Hello, sorry am a complete novice. I have a Raspberry Pi 4b which will not connect to/recognise a Universal Cloning Wireless Remote Control Key Fob for Car Garage Door Gate Fixed code 433mhz. Further described as: A fixed-frequency remote clone (433.92mhz) for copying 99.99% of the common fixed and learning code remotes.
Is it possible to connect to any key fob which would be used to remotely turn Pi 4b on/off for example?
Thank you.
Amazon link to key fob:
https://www.amazon.co.uk/gp/product/B07 ... UTF8&psc=1

drgeoff
Posts: 12165
Joined: Wed Jan 25, 2012 6:39 pm

Re: Wireless Key fob

Mon Aug 02, 2021 8:54 pm

Not clear what you are trying to do. No RPi has a wireless receiver or transmitter for frequencies around 433 MHz.
Quis custodiet ipsos custodes?

KeithMck
Posts: 287
Joined: Thu Dec 31, 2020 10:58 am

Re: Wireless Key fob

Tue Aug 03, 2021 12:33 pm

No.

At least, not directly, you may be able to, if you have a receiver for those fobs wired into the power supply for the RPi4.

W. H. Heydt
Posts: 14952
Joined: Fri Mar 09, 2012 7:36 pm
Location: Vallejo, CA (US)

Re: Wireless Key fob

Tue Aug 03, 2021 4:45 pm

KeithMck wrote:
Tue Aug 03, 2021 12:33 pm
No.

At least, not directly, you may be able to, if you have a receiver for those fobs wired into the power supply for the RPi4.
That would be a bad way to do it. Suddenly dropping power on running system will--sooner or later--give you a corrupted file system. Better to attach the receiver to the Pi and have the signal cause a system shutdown.

KeithMck
Posts: 287
Joined: Thu Dec 31, 2020 10:58 am

Re: Wireless Key fob

Tue Aug 03, 2021 6:00 pm

I defer to W.H.Heydt, who has much more experience than I, about such things... 8-)

drgeoff
Posts: 12165
Joined: Wed Jan 25, 2012 6:39 pm

Re: Wireless Key fob

Tue Aug 03, 2021 8:40 pm

And a system shutdown does not turn a RPi off if your meaning of "off" is that the RPi stops drawing any current from its power source.
Quis custodiet ipsos custodes?

seskc1
Posts: 2
Joined: Mon Aug 02, 2021 6:20 pm

Re: Wireless Key fob

Mon Aug 09, 2021 7:54 pm

Thank you for your help.

Return to “Off topic discussion”