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Developer Guide

Using the AWS IoT Device SDK for JavaScript

The easiest way to install the AWS IoT Device SDK for Node.js is to use npm. In this section we describe how to install Node and npm.

Set Up the Runtime Environment for the AWS IoT Device SDK for JavaScript

To use the AWS IoT Device SDK for JavaScript, install Node and the npm development tool on your Raspberry Pi. These packages are not installed by default.

Note

Before you continue, you might want to configure the keyboard mapping for your Raspberry Pi. For more information, see Configure Raspberry Pi Keyboard Mapping.

  1. To add the Node repository, open a terminal and run the following command:

    curl -sL https://deb.nodesource.com/setup_8.x | sudo -E bash -
  2. To install Node, run

    sudo apt-get install nodejs
  3. Run npm -v to determine if npm is install. If no version information is returned, install npm as follows:

    sudo apt-get install npm

    You should see output similar to the following:

  4. To verify the installation of Node and npm, run the following:

    node -v

    and

    npm -v

    You should see output similar to the following:

Install the AWS IoT Device SDK for JavaScript

To install the AWS IoT Device SDK for JavaScript/Node.js on your Raspberry Pi, open a console window and from your ~/deviceSDK directory, use npm to install the SDK:

npm install aws-iot-device-sdk

After the installation is complete, you should find a node_modules directory in your ~/deviceSDK directory.

Prepare to Run the Sample Applications

The AWS IoT Device SDK for JavaScript includes sample apps for you to try. To run them, you must configure your certificates and private key.

Edit the file ~/deviceSDK/node_modules/aws-iot-device-sdk/examples/lib/cmdline.js to change the default names for the private key (privateKey), certificate (clientCert), and CA root certificate (caCert) used by the samples. For example:

default: { region: 'us-east-1', clientId: clientIdDefault, privateKey: '4bbdc778b9-private.pem.key', clientCert: '4bbdc778b9-certificate.pem.crt', caCert: 'root-CA.crt, testMode: 1, reconnectPeriod: 3 * 1000, /* milliseconds */ delay: 4 * 1000 /* milliseconds */ };

Run the Sample Applications

Run the examples using

node examples/<YourDesiredExample>.js -f <certs location>

Assuming you are in the directory ~/deviceSDK/node_modules/aws-iot-device-sdk/, the certificates location should be ~/deviceSDK/certs/. For more information about how you can use command line options to specify the certificates location and your own host address, see Certificates.

If you want to create a configuration file for use with the command line option --configuration-file (-F), create a file (in JSON format) with the following properties. For example:

{ "host": "a22j5sm6o3yzc5.iot.us-east-1.amazonaws.com", "port": 8883, "clientId": "MyRaspberryPi", "thingName": "MyRaspberryPi", "caCert": "root-CA.crt", "clientCert": "4bbdc778b9-certificate.pem.crt", "privateKey": "4bbdc778b9-private.pem.key" }

Your Raspberry Pi is now connected to AWS IoT using the AWS IoT SDK for JavaScript.