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SimulatedDevice.js
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SimulatedDevice.js
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// Copyright (c) Microsoft. All rights reserved.
// Licensed under the MIT license. See LICENSE file in the project root for full license information.
'use strict';
// The device connection string to authenticate the device with your IoT hub.
//
// NOTE:
// For simplicity, this sample sets the connection string in code.
// In a production environment, the recommended approach is to use
// an environment variable to make it available to your application
// or use an HSM or an x509 certificate.
// https://docs.microsoft.com/azure/iot-hub/iot-hub-devguide-security
//
// Using the Azure CLI:
// az iot hub device-identity show-connection-string --hub-name {YourIoTHubName} --device-id MyNodeDevice --output table
var connectionString = '{Your device connection string here}';
// Using the Node.js Device SDK for IoT Hub:
// https://github.com/Azure/azure-iot-sdk-node
// The sample connects to a device-specific MQTT endpoint on your IoT Hub.
var Mqtt = require('azure-iot-device-mqtt').Mqtt;
var DeviceClient = require('azure-iot-device').Client
var Message = require('azure-iot-device').Message;
var client = DeviceClient.fromConnectionString(connectionString, Mqtt);
// Create a message and send it to the IoT hub every second
setInterval(function(){
// Simulate telemetry.
var temperature = 20 + (Math.random() * 15);
var message = new Message(JSON.stringify({
temperature: temperature,
humidity: 60 + (Math.random() * 20)
}));
// Add a custom application property to the message.
// An IoT hub can filter on these properties without access to the message body.
message.properties.add('temperatureAlert', (temperature > 30) ? 'true' : 'false');
console.log('Sending message: ' + message.getData());
// Send the message.
client.sendEvent(message, function (err) {
if (err) {
console.error('send error: ' + err.toString());
} else {
console.log('message sent');
}
});
}, 1000);