node-js javascript sample

Author: evz-aws

node-javascript/.gitignore

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+/node_modules
+package-lock.json

node-javascript/README.md

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+# AWS IoT Sample Code with Node.js and Javascript
+
+This repository contains a single Javascript file that will connect to AWS IoT core using the MQTTS open protocol using certificates.
+
+## Pre-requisites
+* npm (v9.8.1+)
+* Node.js (v18.17.0+)
+* [AWS Account](https://portal.aws.amazon.com/gp/aws/developer/registration/index.html?nc2=h_ct&src=header_signup)
+
+## Getting Started
+1. [Create an AWS IoT Core instance](https://docs.aws.amazon.com/iot/latest/developerguide/iot-gs.html#aws-iot-get-started)
+2. [Retrieve certificates for connection](https://docs.aws.amazon.com/iot/latest/developerguide/device-certs-create.html) and put them into this folder
+3. Inside `index.js` replace line 5 to 8 with your own values
+4. Run `node index.js` to start publishing sample data!

node-javascript/index.js

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+const mqtt = require("mqtt");
+const fs = require("fs");
+
+// REPLACE THE FOLLOWING WITH YOUR OWN VALUES
+const BROKER = "YOUR BROKER ENDPOINT"// should look similar to: example-ats.iot.us-east-1å.amazonaws.com;
+const THING_NAME = "YOUR THING NAME"
+const CERT_FILE_NAME = "YOUR CERTIFICATE FILE NAME (PEM)"
+const PRIVATE_KEY_FILE_NAME = "YOUR PRIVATE KEY FILE NAME (PEM"
+
+
+const options = {
+  rejectUnauthorized: false,
+  port: 8883,
+  host: BROKER,
+  clientId: THING_NAME,
+  cert: fs.readFileSync(`./${CERT_FILE_NAME}`, "utf8"),
+  key: fs.readFileSync(`./${PRIVATE_KEY_FILE_NAME}`, "utf8"),
+  connectTimeout: 10_000,
+};
+const client = mqtt.connect(`mqtts://${BROKER}`, options);
+
+client.on("connect", () => {
+  console.log("connected");
+  setInterval(function() {
+    console.log(new Date().getSeconds())
+    client.publish(THING_NAME, JSON.stringify([
+    {
+      "label": "Accelerometer",
+      "display_type": "line_graph",
+      "unit": "meters",
+      "values": [
+        {
+          "value": Math.floor(Math.random() * 101),
+          "label": "x"
+        },
+        {
+          "value": Math.floor(Math.random() * 101),
+          "label": "y"
+        },
+        {
+          "value": Math.floor(Math.random() * 101),
+          "label": "z"
+        }
+      ]
+    },
+    {
+      "label": "Gyroscope",
+      "display_type": "line_graph",
+      "unit": "meters",
+      "values": [
+        {
+          "value": Math.floor(Math.random() * 101),
+          "label": "x"
+        },
+        {
+          "value": Math.floor(Math.random() * 101),
+          "label": "y"
+        },
+        {
+          "value": Math.floor(Math.random() * 101),
+          "label": "z"
+        }
+      ]
+    },
+    {
+      "label": "Battery",
+      "display_type": "donut_graph",
+      "unit": "%",
+      "values": [
+        {
+          "value": 72,
+          "label": "Charged"
+        }
+      ]
+    },
+    {
+      "label": "GPS",
+      "display_type": "map",
+      "unit": "",
+      "values": [
+        {
+          "value": -122.33328,
+          "label": "Longitude"
+        },
+        {
+          "value": 47.61544,
+          "label": "Latitude"
+        },
+        {
+          "value": 118732,
+          "label": "Accuracy (m)"
+        }
+      ]
+    }
+  ]));
+}, 1000);
+});
+
+client.on("reconnect", () => {
+  console.warn('reconnecting')
+})

node-javascript/package.json

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+{
+  "name": "aws-iot-node-js-sample",
+  "version": "1.0.0",
+  "description": "Sample code for AWS IoT services with NodeJs and Javascript",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "author": "",
+  "license": "",
+  "dependencies": {
+    "mqtt": "^5.3.1"
+  }
+}