Gravity: DHT22 Temperature & Humidity Sensor For Arduino

Read temperature and humidity with the DHT22 module for Gravity

The DHT22 is the big brother of the DHT11, a component able to grab relative humidity and temperatur in the air with an higher accuracy.

The DHT22 use the capacitive effect to evaluate relative humidity within a range of 0 to 100% HRel (higher range than DHT11). This component is suited to mesure air humidity in a room, greenhouse and will be a great choice for environmental data capture. Please note that such sensor is not designed for DIY AirCo enslavement). 

Please note that if the sensor can measure relative humidity between 0 and 100%, reaching the dew point will expose the sensor electronics to water... and water and electronic are not made to be compatible.

This sensor is very simple to use and very well supported on Arduino, MicroPython or Raspberry-Pi plateforms.

Compare to the DHT11, this sensor is more accurate, more reliasble and can make measurement over a wider range of temperature or humidity but it is also more expensive.

The Gravity Interface will allow to wire this module on the IO Gravity shield for Arduino. The Gravity connectivity can be used with breadboard or perfboard thank to the 2.54mm connector spacing.

Technical details

• Affordable
• Power supply 3 to 5V (also with I/O)
• Curent: 1.5mA while conversion (and data transmission)
• Suited to read Humidity from 0 to 100% HRel (with accuracy of 2%).
• Suited for temperature reading from -40°C to +80°C (with accuracy if ±0.5°C).
• Max sampling of 1 Hz (once every second)
• DHT22 technical datasheet (chinese)

Content

For each order, you will receive a DHT22 module with a Gravity cable (to 2.54mm spacing).