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Thông tin chi tiết sản phẩm

Tên sản phẩm:

Cảm Biến Nhiệt Độ và Độ Ẩm DHT22

Giá:

75.000

Tình trạng:

Liên hệ

Xuất xứ:

China

Hãng sản xuất:

China

Mã sản phẩm:

DHT22

75.000

75.000 1+ units
75.000 10+ units
75.000 100+ units
  • DESCRIPTION

    The DHT22 is a basic, 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 the left to 3-5V power, the second pin to your data input pin and the right most pin to ground. Although it uses a single-wire to send data it is not Dallas One Wire compatible! If you want multiple sensors, each one must have its own data pin! We have written an Arduino library with example code

    Compared to the DHT11, this sensor is more precise, more accurate and works in a bigger range of temperature/humidity, but its larger and more expensive

    Comes with a 4.7K - 10K resistor, which you will want to use as a pullup from the data pin to VCC.

  • TECHNICAL DETAILS

    • Low cost
    • 3 to 5V power and I/O
    • 2.5mA max current use during conversion (while requesting data)
    • Good for 0-100% humidity readings with 2-5% accuracy
    • Good for -40 to 80°C temperature readings ±0.5°C accuracy
    • No more than 0.5 Hz sampling rate (once every 2 seconds)
    • Body size 27mm x 59mm x 13.5mm (1.05" x 2.32" x 0.53")
    • 4 pins, 0.1" spacing

    Downloads:

    DHT22 datasheet

    Arduino library and example code

    Detailed usage tutorial