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Temperature & Humidity Sensor

Gravity: DHT22 Temperature and Humidity Sensor

SKU: SEN0137

DHT22 is a capacitive humidity sensing digital temperature and humidity module with calibrated digital signal output. Using dedicated tech, it has high reliability/stability, including a capacitive wet component, high-precision temp device, and 8-bit MCU. Features: excellent quality, fast response, strong anti-jamming, cost-effectiveness, standard single-bus interface, small size, low power, 20m transmission. Higher precision, replaces SHT10, measures env temp/humidity, and works with Arduino for interactive effects.

Angled shot of back of DHT22 temperature & humidity sensor module with gold connectors and Ethernet jack-DFRobot product sku:SEN0137 image.

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    • Specification

    Parameter Value
    Supply voltage 5V
    Output voltage 0-3.3V
    Temperature range -40-80℃ resolution 0.1℃ error <±0.5℃
    Humidity range 0-100%RH resolution 0.1%RH error ±2%RH
    Size 38 x 20mm

    Pinout

    Pin Name Label Description
    S Output Signal Output
    VCC VCC Power
    GND GND GND

    FAQ

    • Hi, I bought this sensor. But there are so many confustions. I want to use it with raspberry pi instead of arduino. Will it support raspberry pi? First, please clarify me it this is a digital sensor or analog sensor? Which port is the VCC and GND? Your schematic diagram says the middle one is ground and your Wiki page shows the middle one is VCC. Second, your wiki page says "Connect a 4.7K resistor between VCC and the data pin (strong pullup)" but your schematic shows there is already a 10K pull up resistor. So which one is correct? Do I need to connect pullup resistor or not?

      HI, I've checked the schematic, it has been out of date. please follow the wiki guide. and it doesn't need resister, since it has been integrated on the sensor. The middle pin for Gravity sensor series is VCC. you could connect the cable on sensor, Black is GND, red is VCC, Green means this is digital sensor. Here is a problem with RPI, the sensor requires a library for its communication protocol, I am not sure how to do it. Google show me this one, maybe it will be helpful. http://www.rototron.info/dh...

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