Sentry

Sentry is a NodeJS security system. It is divided into separate 3 module:

• Camera: Connects a webcam to the server
• Client: The frontend interface for Sentry
• Server: All clients and cameras connect to the server

Install

The default configs will let you run all three modules on a single machine and play with it.

Camera Module

• NodeJS
• OpenCV dependencies
• Typescript and ts-node
• pm2 if you would like it to autostart on start up
• npm install
• Copy src/config.default.ts to src/config.ts

Raspberry Pi

If you are installing the camera part on a Raspberry Pi:

Install NodeJS

• wget https://nodejs.org/dist/v14.16.0/node-v14.16.0-linux-armv7l.tar.gz
• tar -xzf node-v14.16.0-linux-armv7l.tar.gz
• sudo cp -r node-v14.16.0-linux-armv7l/* /usr/local/

Typescript and Friends

• sudo npm install -g typescript ts-node nodemon pm2

Camera

You'll need to install the dependencies for OpenCV: sudo apt install cmake build-essential unzip pkg-config libjpeg-dev libpng-dev libtiff-dev libavcodec-dev libavformat-dev libswscale-dev libv4l-dev libxvidcore-dev libx264-dev libgtk-3-dev libcanberra-gtk* libatlas-base-dev gfortran libasound2-dev

If you are using a Raspberry Pi camera: sudo modprobe bcm2835-v4l2 Or add bcm2835-v4l2 to /etc/modules

You'll also have to add yourself to the video group (if you want run this as non-root):

sudo usermod -a -G video $USER
reboot

Server

• npm install
• Copy src/config.default.ts to src/config.ts

Client

• npm install

Run

npm start in each module:

• cd camera && npm start
• cd server && npm start
• cd clinet && npm start