Sensor
Aosong（奥松电子）
DHT11 Digital Temperature & Humidity Sensor
Alias: DHT11 、 temperature humidity sensor 、 temperature sensor 、 humidity sensor 、 single-bus sensor 、 Arduino temperature humidity 、 DHT11 module 、 environmental sensor
Specifications
Type Digital temperature & humidity sensor (combined)
Temperature Range 0 ~ 50°C
Temperature Accuracy ±2°C
Humidity Range 20% ~ 90% RH
Humidity Accuracy ±5% RH
Resolution Temperature 1°C / Humidity 1% RH (8-bit each)
Interface Single-bus digital protocol (1-Wire variant, custom timing)
Supply Voltage 3.3 ~ 5.5V DC
Sampling Interval ≥ 1 second (≥ 2 s recommended for stable readings)
Pin Count 4-pin bare (VDD, DATA, NC, GND) / 3-pin module (VCC, DATA, GND, with onboard pull-up resistor)
Typical Applications Temperature & humidity monitoring, weather stations, greenhouse/incubators, HVAC, environmental monitoring
Notes The DHT11 has modest accuracy (±2°C / ±5% RH) and is well-suited for beginners and general environmental monitoring. For higher accuracy, choose the DHT22 or SHT30. Always keep a ≥1 s sampling interval before reading, otherwise it returns NaN.