SHT3XD: High accuracy digital I2C humidity sensor


This sample application periodically (2 Hz) measures the ambient temperature and humidity. The result is written to the console. Optionally, it also shows how to use the upper threshold triggers.



This sample uses the SHT3X_DIS sensor controlled using the I2C interface. Connect Supply: VDD, GND and Interface: SDA, SCL and optionally connect the ALERT to a interrupt capable GPIO. The supply voltage can be in the 2.15V to 5.5V range. Depending on the baseboard used, the SDA and SCL lines require Pull-Up resistors.

Building and Running

This project outputs sensor data to the console. It requires a SHT3XD sensor. It should work with any platform featuring a I2C peripheral interface. It does not work on QEMU. In this example below the Waveshare BLE400 board is used.

# On Linux/macOS
cd $ZEPHYR_BASE/samples/sensors/sht3xd
mkdir build && cd build

# On Windows
cd %ZEPHYR_BASE%\samples\sensors\sht3xd
mkdir build & cd build

# Use cmake to configure a Ninja-based build system:
cmake -GNinja -DBOARD=nrf51_ble400 ..

# Now run ninja on the generated build system:
ninja flash

Sample Output

SHT3XD: 19.64 Cel ; 41.96 %RH
SHT3XD: 19.74 Cel ; 42.06 %RH
SHT3XD: 19.75 Cel ; 42.08 %RH

<repeats endlessly>