I have Sonoff RF Bridge 433 connected to my HA system to open/close a gate and garge door. I am using some generic 433 mhz remotes, all is working well.
I’d like to install a button in my vehicle that when pushed will replicate what the 433 mhz remotes are sending so that I may open/close the gate and garage door opener. I tried hacking the remotes to be triggered by 12v input - no luck.
Is HA controlling the gate and garage door? If so, you likely do not need to “clone” or “replay” any signals, just get another remote and add it’s codes as triggers for your existing automations.
What exactly did you try? Generally, you can just add an appropriately rated buck converter between the source voltage and the remote.
Put one of these solar powered door bell button in the car so no need for 12v. I have one and I use it with sonoff rf bridge with Tasmota on it. It has a good range. Just use an automation to open the gate/garage. This is no very secure as it will make your gate/garage open to replay attacks.
A much more secure way would be to use your phone to connect by VPN to your Home assistant. I wouldn’t recommend using your phone while driving though.
Years ago I used an IFTTT and from the hands free on my car would phone a number(one that wouldn’t be answered) and that caused the gate to open. Now I just leave my gate open and my Garage is full of junk so I can’t park in it.
What went wrong?
Remote control button is usually just connecting transmitter circuit pin to Gnd. If so you can just connect remote gnd and your 12v gnd together and trigger with your button. Also notice that many/most key fobs actually have 12v battery inside.
Be aware you can’t send two signals contemporarily, they probably interfere between each other.
But why don’t you just use remote control in the first place??
