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PRODUCT DETAILS

Grove - DHT22 is a high-accuracy temperature and humidity sensor based on the DHT22 module (also known as AM2302 or RHT03). High-cost performance and high precision make it ideal for temperature and humidity monitoring of Arduino and Raspberry Pi, you can also use it to make a thermometer and hygrometer.

Features

  • High accuracy and wide range of temperature and humidity measurements:
    - Humidity: 0 to 99.9 %RH with ±2% accuracy
    - Temperature: -40 to 80°C with an accuracy of ±0.5°C
  • Ultra-low power consumption: standby current supply as low as 40uA
  • Professional choice for relatively demanding applications: outperforms the basic DHT11
  • Better compatibility: digital output of sensor data, I²C interface makes it more versatile
  • Starter-friendly: Factory calibrated, easy to use, and backed by detailed wiki and documentation

Description

The DHT22 includes a capacitive humidity sensor and a high-precision temperature sensor. The range of humidity sensor is 0 to 99.9 %RH with ±2% accuracy while the temperature sensor ranges from -40 to 80℃ with ±0.5℃ accuracy. With the help of a built-in 8-bit microcontroller, the DHT22 converts the analog output of those two sensors to the digital signal, and outputs both temperature and humidity data via a single pin.
Compared with the DHT11, this product has higher precision and a wider measurement range, but the usage and code are almost the same. Simply put, if you need higher measurement accuracy, this product will be a better choice; if you need a higher price/performance ratio, then Grove - Temperature & Humidity Sensor (DHT11) may be more appropriate. The table lists below the main differences between the DHT22, DHt20 and DHT11:

DHT22 DHT20 DHT11
Supply Voltage DC: 3.0 - 6.0V DC: 2.0 – 5.5V DC: 3.3 – 5.5V
Measuring Range (Temperature) -40 ~ + 80 ℃ -40 ~ + 80 ℃ -20 ~ + 60 ℃
Measuring Range (Humidity) 0 ~ 100% RH 0 ~ 100% RH 5 ~ 95% RH
Temperature Accuracy ± 0.5 ℃ ± 0.5 ℃ ± 1 ℃
Humidity Accuracy ± 2 % RH ( 25 ℃ ) ± 3 % RH ( 25 ℃ ) ± 5 % RH ( 25 ℃ )
Output Signal I2C signal I2C signal 1-Wire

DHT22 and DHT11 are both excellent temperatures and humidity sensors and they are widely used in Arduino and Raspberry Pi projects. However, from the comparison, the DHT22 outshines the DHT11 in every aspect from temperature range, temperature accuracy, humidity range to humidity accuracy. The only downside of the DHT22 is of course the slightly higher price but you are paying for the better specs.

So if you want a sensor with a wider range and accuracy, go for the DHT22. If not, the DHT11 should work fine for your projects as well.

All in all, DHT22 is an excellent low-cost temperature and humidity module, so we made this DHT22 breakout board with a Grove connector. Now it has even become more convenient to use. Just plug and play with your Seeeduino or Grove compatible shield. We have developed more than 400 Grove modules, covering a wide range of applications that can fulfill a variety of needs.

Attention

Since the DHT22 has been discontinued, this sensor will be EOL soon. We strongly recommend you use the upgraded DHT20 sensor, that is Grove - Temperature & Humidity Sensor V2.0 (DHT20)

Applications

  • Environmental monitoring
  • Thermometer and hygrometer
  • Dehumidifier

Hardware Overview

pinout

Technical details

Dimensions 40mm x20mm x11mm
Weight G.W 11g
Battery Exclude

Part List

Grove - Temperature&Humidity Sensor Pro 1
Grove cable 1

ECCN/HTS

HSCODE 9025900090
USHSCODE 9031808070
UPC 841454107521
EUHSCODE 9013101000
COO CHINA
EU DoC 1
RoHS 1
UK DoC 1

LEARN AND DOCUMENTS

Learn

Foton is a special lightsaber, which can monitor temperature and humidity of a room, detect movements, and send those data to a smartphone.
Simple weather station Arduino UNO: measures temperature, humidity, air pressure using BMP280, DHT11, windspeed 3D-printed anemometer.
With so many temperature sensors available, how should we choose the right one for our Arduino project? Well, it really depends on several factors such as what we are measuring, the degree of accuracy we need and where we may be measuring the temperature.
Different temperature and humidity sensors have large performance differences and large price differences. So how to choose the most suitable sensor for your project?
Looking for low-cost temperature and humidity sensors? DHT11 and DHT22 are the most common temperature and humidity modules for Arduino and Raspberry Pi. DHT sensors will be perfect for you. Despite being slower than other temperature sensors, they have advantages including low power consumption and excellent long-term stability.
This project helps to monitor temperature and humidity values of a particular location along with device battery level.
This is a powerful sister version of our Grove - Temperature and Humidity Sensor. It has more complete and accurate performance than the basic version. The detecting range of this sensor is 5% RH - 99% RH, and -40°C - 80°C. And its accuracy reaches up to

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