The Gravity DHT20 Sensor provides precise temperature and humidity readings, operating within a temperature range of -40 to +80°C and a humidity range of 0 to 100%RH, utilizing an I2C output for easy integration.

Downloadable Resources

Dimension

Schematics

Datasheet

GitHub

Docs

Tech Specs

Projects

1. Example Code for Arduino-Read Sensor Data

Download the program to UNO, open the serial monitor to check temperature and humidity. Read ambient temperature and relative humidity and print them to serial port.

Specification

Parameter	Value
Operating Voltage	3.3V ~ 5.5V DC
Operating Current	<1mA
Output Signal	I2C (0×38)
Temperature Range	-40 ~ +80°C ± 0.5°C
Humidity Range	0 ~ 100%RH ± 3%RH (25°C)
Resolution	0.01 ℃, 0.024%RH
Storage Condition	10°C-50°C, 20-60%RH
Circuit Board Dimension	22×33mm/0.87×1.30"
Mounting Hole Size	Inner diameter 3.1 mm (0.12")/Outer diameter 6mm (0.24")

Pinout

Num	Label	Description
1	D	I2C data line SDA
2	C	I2C clock line SCL
3	-	GND power negative
4	+	Power positive

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FAQ

After uploading the code, there is no data output or the output value is obviously wrong?

Caused by power fluctuations,first connect the sensor to the controller, and then supply power to the entire system to solve the problem

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