mm-server

This is a little Node/Express application that is designed to run on a Raspberry Pi. It takes a picture of a barcode and reads the barcode in the picture.

Install

• Clone the repository
• npm install
• Make the .env file:

NODE_ENV=development
PORT=3000
SOCKET_PORT=4000
PICTURE_PATH=dist/assets/customer-photos
PICTURE_SUFFIX=.jpg
PEM_FILE=~/.ssh/cloud-node.pem
CLOUD_USER=bitnami
CLOUD_URL=ec2-54-221-218-6.compute-1.amazonaws.com

Environment Variables
Variable	Definition
NODE_ENV	A string. This will be either `development` or `production`
PORT	A number. This is what port the http routes will be listened to, as in POST url:PORT/route
SOCKET_PORT	A number. This is the port for the socket.
PICTURE_PATH	A string. This is the base directory where the pictures will be put.
PICTURE_SUFFIX	A string. This is the suffix of the picture files.
PEM_FILE	A string. This is the path and file of the *.pem file for cloud-node
CLOUD_NODE	A string. This is a user for rsync (copying pictures).
CLOUD_URL	This is the URL of the cloud

Notes if working on Mac: If you want to run this on your Mac instead of the Raspberry Pi:

• The POST /api/picture likely won't work because you don't have raspistill

• If you don't have the Mirror App in the dist directory, the PICTURE_PATH should be set to a directory that can be made, eg. customer-photos.

• Run the code For development:

npm run watch

or:

node server.js

Routes

PUT '/api/barcode'

This is hardcoded to return '123456'. I left it there as an example of how to add a new module and route.

POST '/api/picture'

This accepts a body like this:

{
  "directory": "paul",    // required
  "base_name": "camera",  // optional - basename of image, default is 'camera'
  "options": {            // optional - options for raspistill
    "rot": "180",
    "quality": "100"
  }
}

It uses PICTURE_PATH. If PICTURE_PATH="images", then the above body will execute the raspistill command like this:

raspistill -rot 180 --quality 100 -o images/paul/camera80417

The '80417' on the end of the filename is the hour, minute, second the picture was taken. This route will respond with the path of the picture as in "images/paul/camera80417"