The DHT21/AM2301 is a high-precision capacitive digital temperature and humidity sensor operating at 3.3V–5.5V. It offers a wide temperature range of -40°C to 80°C and 0–100% RH with ±0.5°C and ±3% RH accuracy. Ideal for Arduino, IoT, weather monitoring, and smart home automation projects.
The DHT22 is a high-precision digital temperature and humidity sensor module ideal for Arduino, Raspberry Pi, ESP8266, IoT systems, smart homes, and weather stations. With stable output, wide range, and digital signal interface, it’s perfect for climate monitoring, automation, and data logging projects.