Adafruit

DHT11 basic temperature-humidity sensor + extras

Art.nr: DHT11
45 Kr
Lagerstatus: 20
Leveranstid: 1-3 Vardagar

The DHT11 is a basic, ultra low-cost 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)...

  • Tipsa
    Tipsa en vän
  • Önska
Dela:
The DHT11 is a basic, ultra low-cost 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). Its fairly simple to use, but requires careful timing to grab data. The only real downside of this sensor is you can only get new data from it once every 2 seconds, so when using our library, sensor readings can be up to 2 seconds old.

Simply connect the first pin on left to 3-5v power, second your data input and right most to ground. Although it uses a single-wire to communicate it is not dallas one wire compatible! If you want multiple sensors, each sensor must have its own pin on the micro controller! We have written an Arduino library with example code

Comes with a 4.7K or 10K resistor, which you will want to use as a pullup from the data pin to VCC.
  • Low cost
  • 3 to 5V power and I/O
  • 2.5mA max current use during conversion (while requesting data)
  • Good for 20-80% humidity readings with 5% accuracy
  • Good for 0-50°C temperature readings ±2°C accuracy
  • No more than 1 Hz sampling rate (once every second)
  • Body size 15.5mm x 12mm x 5.5mm
  • 4 pins with 0.1" spacing