Doorbell

Open source iot video doorbell with Chromecast support

This is an open source project to avoid big-tech home securitry products which may include audio and video of the home. Recent stories have highlighted the problems with only a handfull of monoliths looking after such personal information, whether it is employees looking at our feeds, being hacked or flawed and the risks turning our communities into CCTV police state, all makes me uncomfortable. Further reading below.

This is not intended to be an intercom security system.

Notes

RPi to recieve, transcode and broadcast video Something like raspivid -fps 25 -o - -t 0 -w 600 -h 400 | cvlc stream:///dev/stdin --sout '#rtp{sdp=rtsp://:8554/}' :demux=h264

raspivid -fps 25 -o - -t 0 -w 600 -h 400 by setting -o (output) to -, this buffers the output to stdout cvlc stream:///dev/stdin --sout '#rtp{sdp=rtsp://:8554/}' :demux=h264, then pipe the stdout to vlc stdin and broadcast

MVP Scenarios

When a doorbell event is received, a number of reactions can be handled to notifify a service.

1 - Doorbell

The doorbell is pressed creating an Doorbell.start and Doorbell.end events. This causes 2 reactions

A chromecast event is sent to the HomeHub to connect a live video from the RPi.
A photo is sent to an s3 bucket so that it can be viewed on a users device and a sms sent with the url for a image preview on the users phone.

2 - Sensor

When a door opens with a sensor on, the circut is broken which sends a DoorSensor.open event. This causes 2 reactions

A webhook is sent to Hue lights which will turn on the light in the porch.
A photo is sent to an s3 bucket so that it can be viewed on a users device and a sms sent with the url for a image preview on the users phone.

How

A bell and a sensor are hooked up to an rpi via the gpio, we have a node script listening to when there are changes in the circut.

Attatched to the RPi is a camera, we will pipe the camera output directly to VLC. VLC is then responsible for transcoding the video and sending it to mutliple locations

transcoded output written to disk

Events

Camera.on('motion')

Mic.on('sound');

Doorbell.on('start')

Doorbell.on('end')

DoorSensor.on('open')

DoorSensor.on('closed')

Reactions

Webhook

SNS or other queue system

Stream from camera to Chromecast

Send photo from camera to service

Send clip from camera to service

Hardware

RaspberryPi
Camera Module
Mic
Magnetic sensor Doorbell
Chromecast/ NestHub.

https://www.nytimes.com/2020/02/19/technology/personaltech/ring-doorbell-camera-spying.html.

danm/doorbell