A few interested netizens have been in touch regarding the Ennio doorbell. The device isn’t an impenetrable box quite the opposite. It’s built on top of OpenWRT by the looks of things and here’s what we know.
As per the datasheet UART PINS 39 and 40 can be used to connect to the device by connecting to a Raspberry Pi providing a serial console and flashing can be achieved via TFTPD.
The camera is a UVC camera which makes things fairly simple to get into.
What we need to achieve next is a full mapping of GPIO pins to input output functions; e.g. GPIO14 = Doorbell (just a guess).
I’m hoping to get some kind of build system up and running and a github project to host it. I’ll even write up some custom software so you can free your doorbell from whatever security problems exist on the other side of it (amazon cloud).
What needs GPIO mapping.
- Touch button
- Blue LED for button (is this controllable)
- Light Sensor
- IR LEDs
- Relay port
What we’re uncertain of
- Microphone input configuration
- Speaker output configuration