MQTT Visualisierte Steuerung Sensor
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Voraussetzungen
- Voraussetzungen für Node.js-Projekt
- apt install mosquitto-clients
Neues Verzeichnis für den Steuerungsserver erstellen
- mkdir /usr/local/control-switch
- cd /usr/local/control-switch
Initialisiere das Node.js-Projekt
- npm init -y
Installiere die benötigten Pakete
- npm install mqtt express
Konfiguration des Steuerungsservers
Erstelle die Datei switch-server.js im Verzeichnis /usr/local/control-switch mit folgendem Inhalt:
const mqtt = require('mqtt');
const express = require('express');
const path = require('path');
const app = express();
const port = 3000;
const fs = require('fs');
let status = {
livingRoom: 'off',
bedroom: 'off',
kitchen: 'off',
frontDoor: 'closed'
};
// MQTT-Verbindung herstellen
const options = {
// username: 'xinux',
// password: '123Start$',
// port: 8883,
// protocol: 'mqtts',
// ca: fs.readFileSync('./ca.crt'),
port: 1883,
host: 'mqtt.dkbi.int'
};
const client = mqtt.connect(options);
client.on('connect', () => {
console.log('Connected to the broker');
client.subscribe('home/+/status', (err) => {
if (!err) {
console.log('Subscribed to all topics');
}
});
});
client.on('message', (topic, message) => {
const room = topic.split('/')[1];
status[room] = message.toString();
console.log(`Status of ${room}: ${status[room]}`);
});
// API route to get the status of the lights and front door
app.get('/status', (req, res) => {
res.send(status);
});
// Serve static directory for the web interface
app.use(express.static(path.join(__dirname)));
// Start the web server
app.listen(port, () => {
console.log(`Control Center is running at http://0.0.0.0:${port}`);
});
Die HTML Datei index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Control Center</title>
<style>
.device {
margin: 20px;
padding: 10px;
border-radius: 10px;
text-align: center;
font-size: 1.5em;
cursor: pointer;
}
.on {
background-color: yellow;
color: black;
}
.off {
background-color: gray;
color: white;
}
.open {
background-color: red;
color: white;
}
.closed {
background-color: gray;
color: white;
}
</style>
<script>
// Fetch and display the status of devices
function fetchStatus() {
fetch('/status')
.then(response => response.json())
.then(data => {
// Update the class and text for each device
document.getElementById('livingRoom').className = 'device ' + (data.livingRoom === 'on' ? 'on' : 'off');
document.getElementById('livingRoom').textContent = 'Living Room Light: ' + (data.livingRoom === 'on' ? 'On' : 'Off');
document.getElementById('bedroom').className = 'device ' + (data.bedroom === 'on' ? 'on' : 'off');
document.getElementById('bedroom').textContent = 'Bedroom Light: ' + (data.bedroom === 'on' ? 'On' : 'Off');
document.getElementById('kitchen').className = 'device ' + (data.kitchen === 'on' ? 'on' : 'off');
document.getElementById('kitchen').textContent = 'Kitchen Light: ' + (data.kitchen === 'on' ? 'On' : 'Off');
document.getElementById('frontDoor').className = 'device ' + (data.frontDoor === 'open' ? 'open' : 'closed');
document.getElementById('frontDoor').textContent = 'Front Door: ' + (data.frontDoor === 'open' ? 'Open' : 'Closed');
});
}
// Toggle a device and update its status
function toggleDevice(device) {
fetch(`/toggle/${device}`, { method: 'POST' })
.then(fetchStatus);
}
// Fetch status every second
setInterval(fetchStatus, 1000);
</script>
</head>
<body>
<h1>Control Center</h1>
<div id="livingRoom" class="device off" onclick="toggleDevice('livingRoom')">Living Room Light: Off</div>
<div id="bedroom" class="device off" onclick="toggleDevice('bedroom')">Bedroom Light: Off</div>
<div id="kitchen" class="device off" onclick="toggleDevice('kitchen')">Kitchen Light: Off</div>
<div id="frontDoor" class="device closed" onclick="toggleDevice('frontDoor')">Front Door: Closed</div>
</body>
</html>
systemd-Unit für den Steuerungsserver erstellen
Erstelle die Datei /etc/systemd/system/control-switch.service mit folgendem Inhalt:
[Unit] Description=Home Control Switch Server [Service] Type=simple WorkingDirectory=/usr/local/control-switch ExecStart=/usr/bin/node server.js ExecStartPost=/bin/echo "Schalt-Server gestartet" [Install] WantedBy=multi-user.target
Steuerungsserver starten und beim Booten aktivieren
- systemctl start control-switch.service
- systemctl enable control-switch.service