Recently developed a small embedded device (using a nRF52840 microcontroller) that allows me to open my front gate remotely using my phone. I no longer have to carry around a gate remote. And my friends/guests can now open the gate from their phone as well. I couldn't find anything on the market for doing that so I'm glad I managed to do it (and it was a good opportunity to learn some embbedded programming and electronics).
Very nice. But I'm not sure my car has Android Auto, it is a bit old... I managed to integrate mine with Google Assistant on my phone so I say "Hey Google, turn on the front gate" (it thinks "front gate" is a switch).
I got pretty far at decoding the signal with a RTL-SDR radio that I bought. It was a OOK code around 433mhz if I recall correctly. But I eventually abandoned that strategy as there was a simpler way to activate the gate through a direct electrical signal. So the device is just acts as a sort of switch now.
