Room Monitor using Flask Server and DHT Sensor
Updated
•2 min read
📁 Project Structure
room_monitor/
├── app.py
├── templates/
│ └── index.html
app.py
from flask import Flask, render_template
import Adafruit_DHT
app = Flask(__name__)
DHT_SENSOR = Adafruit_DHT.DHT11 # or DHT22
DHT_PIN = 4 # GPIO4
@app.route('/')
def index():
humidity, temperature = Adafruit_DHT.read_retry(DHT_SENSOR, DHT_PIN)
if humidity is not None and temperature is not None:
status = "Success"
else:
status = "Sensor error"
temperature = humidity = None
return render_template('index.html', temperature=temperature, humidity=humidity, status=status)
if __name__ == '__main__':
app.run(host='0.0.0.0', port=5000)
index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Room Monitor</title>
<style>
body {
margin: 0;
padding: 0;
font-family: 'Roboto', sans-serif;
background-color: #f0f2f5;
display: flex;
justify-content: center;
align-items: center;
height: 100vh;
}
.card {
background: #fff;
padding: 30px 40px;
border-radius: 20px;
box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
text-align: center;
max-width: 350px;
width: 100%;
}
h1 {
color: #222;
margin-bottom: 25px;
font-size: 28px;
}
p {
font-size: 20px;
margin: 15px 0;
color: #333;
}
.status {
font-weight: bold;
margin-top: 20px;
font-size: 16px;
color: green;
}
button {
margin-top: 20px;
padding: 10px 25px;
font-size: 16px;
background-color: #007BFF;
border: none;
color: white;
border-radius: 8px;
cursor: pointer;
transition: background-color 0.3s;
}
button:hover {
background-color: #0056b3;
}
</style>
</head>
<body>
<div class="card">
<h1>🌡️ Room Monitor</h1>
<p><strong>Temperature:</strong> {{ temperature }} °C</p>
<p><strong>Humidity:</strong> {{ humidity }} %</p>
<p class="status">{{ status }}</p>
<button onclick="location.reload()">🔄 Refresh</button>
</div>
</body>
</html>
To auto-reload the page every 5 seconds using JavaScript, you can add a simple <script> tag before the closing </body> tag. Here's your updated HTML with the auto-reload functionality:
<script>
setTimeout(function() {
location.reload();
}, 5000); // Reload every 5 seconds
</script>
index.html with auto reload
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Room Monitor</title>
<style>
body {
margin: 0;
padding: 0;
font-family: 'Roboto', sans-serif;
background-color: #f0f2f5;
display: flex;
justify-content: center;
align-items: center;
height: 100vh;
}
.card {
background: #fff;
padding: 30px 40px;
border-radius: 20px;
box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
text-align: center;
max-width: 350px;
width: 100%;
}
h1 {
color: #222;
margin-bottom: 25px;
font-size: 28px;
}
p {
font-size: 20px;
margin: 15px 0;
color: #333;
}
.status {
font-weight: bold;
margin-top: 20px;
font-size: 16px;
color: green;
}
button {
margin-top: 20px;
padding: 10px 25px;
font-size: 16px;
background-color: #007BFF;
border: none;
color: white;
border-radius: 8px;
cursor: pointer;
transition: background-color 0.3s;
}
button:hover {
background-color: #0056b3;
}
</style>
</head>
<body>
<div class="card">
<h1>🌡️ Room Monitor</h1>
<p><strong>Temperature:</strong> {{ temperature }} °C</p>
<p><strong>Humidity:</strong> {{ humidity }} %</p>
<p class="status">{{ status }}</p>
<button onclick="location.reload()">🔄 Refresh</button>
</div>
<script>
setTimeout(function() {
location.reload();
}, 5000); // Reload every 5 seconds
</script>
</body>
</html>
