SHT21 Digital Temperature and Humidity Sensor Breakout Board


  • Read temperature and humidity indoors or outdoors
  • SHT-21’s accuracy is of ±0.3°C in the range –40~90°C and 2% in the entire RH range
  • Pinout is Vdd, Vss, SDA, and SCL (default address 0x40). Supply voltage range is 2.1~3.6VDC
  • SHT-21 includes a built-in bit ADC, which yields data with 8-bit resolution
  • Documentation, tutorials, demos:


SKU: BRK-00055 Categories: , , Tags: ,


This breakout board provides a convenient way to start using the fantastic SHT21 sensor, a high precision, small size, temperature and humidity sensor developed by Sensirion.

Sensirion’s Temperature/Humidity sensors are some of the finest and highest-accuracy devices in the market. Different than others that use a 1-Wire protocol for communication, the SHT21 includes a true I2C interface that makes taking measurements a breeze from any microcontroller or single-board computer. The SHT21 sensor has an excellent ±2% relative humidity and ±0.3°C accuracy, which is perfect for most applications.

This breakout board makes it easy to connect this sensor to your microcontroller board or single-board computer such as Arduino, ESP8266, BeagleBone or Raspberry Pi! The four pins correspond to power (VCC, GND) and I2C communication (SDA, SCL). Pull-up resistors are included on the I2C lines as customary.


  • Typical accuracy of ±2.0% RH and ±0.3°C
  • This 0.45in×0.66in breakout PCB facilitates using the SHT21, specially on solderless breadboards!
  • I2C interface with communication speeds up to 1MHz. Different than the SHT31 (B07M9WNQ4P), the SHT21 only offers one I2C address: 0x40
  • Sturdy (1.6mm), blue PCB with a 4-pin header on one side (Vdd, Vss, SDA, and SCL)
  • Operating Voltage: 2.1~3.6V
  • 4-Pin header included (requires soldering!)

Additional information

Product Dimensions

0.45 x 0.66 x 0.2 inches

Item Weight

1.6 ounces



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