DHT22 Temperature and Humidity Sensor is a basic digital temperature and humidity sensor. It uses a capacitive humidity sensor and a thermistor to measure the surrounding air, and spits out a digital signal on the data pin, no analog input pins needed. Specifications : Operating Voltage : 3.5V to 5.5V Operating current : 0.3mA (measuring) 60uA (standby) Output : Serial data Temperature Range : -40°C to 80°C Humidity Range : 0% to 100% Resolution: Temperature and Humidity both are 16-bit Accuracy: ±0.5°C and ±1%