Secure use of remote control ? (programming.dev)

submitted 1 month ago by Rick_C137@programming.dev to c/raspberry_pi@programming.dev

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Hi Raspberry Pi Community,

I would like to use radio remote's control to trigger an events on my Raspberry pi.

I guess I'll go with 433Mhz as I believe they are the most common available ?

So I will need a 433Mhz RX/TX Module to connect on the GPIO, so far I get it...

But how properly secure the communication between those remotes and the RPI to avoid any anyone to sniff the transmitting and replay it. In other words spoof it.

Wubba Lubba dub-dub...

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[-] hendrik@palaver.p3x.de 0 points 1 month ago* (last edited 1 month ago)

You'd use one of the rolling code mechanisms like in a keyless entry system, garage door opener or a car key fob. Maybe symmetric or asymmetric cryptography instead or on top. Depends on the exact use-case. But you'd have to build the remote yourself, I don't think that's in the readily available consumer products.

If you want it less complicated, have a look at Bluetooth or ESP-NOW. Wifi and Bluetooth and other protocols have encryption handled for you.

[-] Rick_C137@programming.dev 1 points 1 month ago

Thanks hendrik

But you’d have to build the remote yourself

maybe in the future, but I don't have the time for it now...

\

have a look at Bluetooth or ESP-NOW. Wifi and Bluetooth and other protocols have encryption handled for you.

So it their Bluetooth or WiFi remote pilot existing for that ?

this post was submitted on 02 Jun 2025

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