Industrial Internet Application Development

Building an app to read time series data

To build and deploy a Node.js app that simulates reading time series data from sensors, proceed as follows:

Make sure to specify the correct data source in the asset attributes (in this example, devices: /device/raspberry).

1. Create the assets folder:

mkdir assets && cd assets

2. Create the package.json file and paste the following code into it:

{ "name": "assets", "version": "1.0.0", "description": "", "main": "index.js", "scripts": {   "start": "node index.js",   "test": "echo \"Error: no test specified\" && exit 1" }, "author": "", "license": "ISC", "dependencies": {   "predix-uaa-client": "^1.2.2",   "request": "^2.81.0",   "websocket": "^1.0.24" }}

3. Create the index.js file containing the following code. ...