Temp&Hum 23 Click is a compact add-on board providing a temperature and humidity sensing solution. This board features the SHT45, a 4th generation ultra-low-power relative humidity and temperature sensor from Sensirion. The SHT45 is characterized by its high accuracy (±1% RH and ±0.1°C over a wide operating temperature range) and high resolution, providing 16-bit data to the host controller with a configurable I2C interface. Also, it is designed for reliable operation in harsh conditions such as condensing environments. This Click board™ is perfectly suitable for high-volume applications.

Temp&Hum 23 Click is based on the SHT45, a digital sensor platform for measuring relative humidity and temperature at different accuracy classes from Sensirion. The SHT45 builds on a wholly new and optimized CMOS chip offering reduced power consumption, high accuracy, and a digital I2C interface for the fastest data transfer. It covers extended operating humidity and temperature ranges from 0 to 100%RH and from -40°C to 125°C with accuracies of ±1%RH and ±0.1°C.

The SHT45 communicates with MCU using the standard I2C 2-wire interface. The sensor performs best when operated within the recommended average temperature and humidity range of 5-60°C and 20-80% RH. Long-term exposure to conditions outside the recommended normal range, especially at high relative humidity, may temporarily offset the RH signal. After returning to the recommended average temperature and humidity range, the sensor will recover to within specifications by itself.

This Click board™ operates only with a 3.3V logic voltage level. The board must perform appropriate logic voltage level conversion before using MCUs with different logic levels. However, the Click board™ comes equipped with a library containing functions and an example code that can be used, as a reference, for further development.

• Interface: I²C
• Compatibility: mikroBUS™
• Dimensions: 28.6 x 25.4mm
• Input Voltage: 3.3V
• Supply Voltage: 3.3V
• Temperature Accuracy: ±0.1°C
• Relative Humidity Accuracy: ±1%RH
• Resolution: 16 bit
• Operating Humidity Range: Min. 0%RH, Max. 100%RH
• Operating Temperature Range: Min. -40°C, Typ. +25°C, Max. +125°C

• lSchematic
• SHT45-AD1B-R2 Datasheet
• mikroSDK
• GitHub