README.md

🌡 Temperature Display using Arduino (DHT22)

This project demonstrates a temperature monitoring system using an Arduino and DHT22 sensor.
The temperature value is read from the sensor and displayed on the Serial Monitor.

The project is simulated using Wokwi.

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🔗 Simulation Link

👉 Open Simulation

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🔌 Circuit Diagram

👉

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🔧 Components Required

• Arduino Uno
• DHT22
• Breadboard
• Jumper Wires

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🔌 Pin Connections

Component	Arduino Pin
DHT22 VCC	5V
DHT22 GND	GND
DHT22 DATA	D2

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🧠 Working Principle

• The DHT22 measures temperature and humidity.
• Arduino reads digital data from pin D2.
• Temperature value is extracted.
• The value is printed on the Serial Monitor.
• The process repeats every 2 seconds.

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💻 Arduino Code

#include <DHT.h>

#define DHTPIN 2
#define DHTTYPE DHT22

DHT dht(DHTPIN, DHTTYPE);

void setup() {
  Serial.begin(9600);
  dht.begin();
}

void loop() {
  float temperature = dht.readTemperature();

  if (isnan(temperature)) {
    Serial.println("Failed to read from DHT sensor!");
    return;
  }

  Serial.print("Temperature: ");
  Serial.print(temperature);
  Serial.println(" °C");

  delay(2000);
}

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📌 Applications

• Room temperature monitoring

• Smart home systems

• Weather stations

• IoT temperature logging

🚀 Future Improvements

• Display on LCD/OLED

• Add humidity display

• Add temperature alert buzzer

• IoT cloud integration

👨‍💻 Author

Kritish