DHT 22 DIGITAL TEMPERATUER AND HUMIDITY SENSOR

The DHT22 Temperature and Humidity Sensor is a high-precision digital sensor used to measure temperature and relative humidity with greater accuracy than the DHT11. It combines a capacitive humidity sensing element and a temperature sensor with a built-in digital signal processor to provide calibrated digital output through a single-wire communication interface. The sensor operates over a temperature range of −40°C to 80°C and a humidity range of 0% to 100% RH, making it suitable for both indoor and outdoor environmental monitoring. It can be easily interfaced with microcontrollers such as Arduino, ESP32, STM32, Raspberry Pi, and PIC. Due to its high accuracy, wide measurement range, and reliable performance, the DHT22 is widely used in weather stations, smart home automation, greenhouse monitoring, industrial environmental control, IoT applications, and data logging systems.