WiFi-based Temperature Monitoring System using ESP8266 and DHT11

🔧 Project Title: WiFi-based Temperature Monitoring System using ESP8266 and DHT11

🧠 Objective:

The goal of this project is to measure temperature and humidity using the DHT11 sensor and display the data in real-time over WiFi using the ESP8266 microcontroller.

📦 Components Required:

Serial	Component	Quantity
1	ESP8266 NodeMCU	1
2	DHT11 Temperature Sensor	1
3	Jumper Wires	As Needed
4	Breadboard	1

🔗 Circuit Diagram:

💻 Arduino Source Code:

#include <ESP8266WiFi.h>
#include <DHT.h>

#define DHTPIN D4    
#define DHTTYPE DHT11  
DHT dht(DHTPIN, DHTTYPE);

const char* ssid = "YOUR_SSID";
const char* password = "YOUR_PASSWORD";

WiFiServer server(80);

void setup() {
  Serial.begin(115200);
  dht.begin();
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting...");
  }
  Serial.println("WiFi connected");
  server.begin();
}

void loop() {
  WiFiClient client = server.available();
  if (client) {
    float t = dht.readTemperature();
    float h = dht.readHumidity();
    
    String response = "<h1>Temperature: " + String(t) + " *C</h1>";
    response += "<h2>Humidity: " + String(h) + " %</h2>";
    
    client.print("HTTP/1.1 200 OK\r\nContent-Type: text/html\r\n\r\n");
    client.print(response);
    delay(1000);
  }
}

🌐 Output:

• Open your browser and go to the IP address of the ESP8266 module (e.g., http://192.168.0.103)
• You will see temperature and humidity readings in real-time.

📘 Learnings:

• How to use the DHT11 sensor with ESP8266
• How to create a simple ESP8266-based web server
• How to handle HTTP responses and serve live data

🎯 Future Enhancements:

• Log sensor data to Google Sheets or a cloud server
• Display readings on OLED or LCD
• Control alerts using mobile app or MQTT

🔗 GitHub Link:

👉 View Project on GitHub

🎥 Demo Video (Optional):

👉 Watch on YouTube

📩 Contact:

• Email: youremail@example.com
• LinkedIn Profile
• GitHub Profile