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DHT11 Relative Humidity-
Features:
Can detect surrounding environment of the humidity and temperature
Humidity measurement range: 20% ~ 95%
Humidity measurement error: +/-
Temperature measurement range: 0°C ~ 50°C
Temperature measurement error: +/-
Working voltage 3.3V ~ 5V
Output 2.5mA max current use during conversion (while requesting data)
Good for 20-
Good for 0-
No more than 1 Hz sampling rate (once every second)
mode: DIGITAL OUTPUT
PCB size: 3.1 x 1.4cm
Pin connections of DHT11 Sensor : PIN1-
Simply ignore pin 3, its not used. Place a 10K resistor between VCC and the data pin, to act as a medium-
The DHT sensors are made of two parts, a capacitive humidity sensor and a thermistor. There is also a very basic chip inside that does some analog to digital conversion and gives out a digital signal with the temperature and humidity. The digital signal is fairly easy to read using any microcontroller.