Digital Thermometer using DHT22 and Arduino

The Digital Thermometer using Arduino and DHT22 is a simple yet accurate temperature and humidity monitoring system. It uses the DHT22 sensor, a high-precision digital sensor capable of measuring both temperature and relative humidity, and displays the readings on a 16×2 LCD screen. This project is ideal for beginners and engineering students to learn about sensor interfacing and data display using Arduino.

The DHT22 sensor sends temperature and humidity data to the Arduino Uno via a single digital pin. The Arduino processes this data and displays the current temperature (in Celsius) and humidity (in percentage) on the LCD. Using an I2C module with the LCD makes wiring simpler and reduces the number of pins needed.

This project is highly useful in real-world applications such as weather stations, room environment monitoring, greenhouses, or indoor climate control systems. It is a stepping stone for more advanced IoT-based systems that log and transmit environmental data remotely.