80 lines
2.9 KiB
JavaScript
80 lines
2.9 KiB
JavaScript
// Import required modules and types from the compiled TypeScript distribution (via dist/index.js)
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const {
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Alex2MQTT,
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AlexaInterfaceType,
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PowerController
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} = require("../dist/index.js");
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require("dotenv").config(); // Load environment variables from .env file
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// Simulated in-memory device state (used for example/demo purposes)
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let outputState = PowerController.OFF; // Initialize the power state to OFF
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// Load MQTT connection credentials and root topic from environment variables
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const username = process.env.MQTT_USERNAME;
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const password = process.env.MQTT_PASSWORD;
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const rootTopic = process.env.MQTT_ROOT_TOPIC;
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// Create and initialize a new Alexa-to-MQTT client
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const alex2NodeClient = new Alex2MQTT(username, password, rootTopic, false);
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alex2NodeClient.connect(); // Connect to the MQTT broker
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// Define the device name (bedroom light)
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const deviceName = "Bedroom Light";
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// Register the device with a unique endpoint ID (you can use something like "endpoint1")
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const bedroomLight = alex2NodeClient.registerDevice(deviceName, "endpoint2");
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// Add the PowerController capability (for turning on/off the device)
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bedroomLight.addCapability(AlexaInterfaceType.POWER_CONTROLLER);
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// Log the device name to verify registration
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console.log(bedroomLight.getName());
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/**
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* Handle Alexa's ReportState directive.
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* This occurs when Alexa queries the current state of the device (e.g., during routines or device status checks).
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*/
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bedroomLight.on("ReportState", (payload) => {
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console.log("ReportState received!", payload);
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const { correlationToken } = payload.header;
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const status = bedroomLight.getStatusMessage(correlationToken);
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status
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.addHealthProp("OK") // Device is healthy
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.addPowerControllerProp(outputState); // Report the current power state (ON/OFF)
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status.send(); // Send the state report back to Alexa
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});
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/**
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* Handle incoming control directives (e.g., TurnOn, TurnOff).
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* These directives come from Alexa when a user issues a command.
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*/
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bedroomLight.on("Event", (directive, interfaceType) => {
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console.log("Event received", { directive, interfaceType });
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// Ensure the interfaceType is either PowerController or other valid interfaces
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if (interfaceType === AlexaInterfaceType.POWER_CONTROLLER) {
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const name = directive.header.name;
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const token = directive.header.correlationToken;
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// Update the internal state based on the command (TurnOn / TurnOff)
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if (name === "TurnOn") {
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outputState = PowerController.ON;
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console.log("Turning ON the Bedroom Light");
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} else if (name === "TurnOff") {
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outputState = PowerController.OFF;
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console.log("Turning OFF the Bedroom Light");
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}
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// Respond to the directive with the updated device status
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const status = bedroomLight.getStatusMessage(token, true);
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status
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.addHealthProp("OK")
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.addPowerControllerProp(outputState)
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.send();
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}
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});
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