PHT Click is a compact add-on board that contains a PHT combo sensor. This board features the MS8607, a digital combination sensor providing 3 environmental measurements all-in-one: pressure, humidity, and temperature from TE Connectivity. This sensor is based on leading MEMS technologies, provides factory-calibrated PHT data available over an I2C serial interface. The standout feature of the MS8607, alongside its very respectable low power consumption at as low as 0.78 µA, is also ultra-low power consumption and high PHT accuracy. This Click board™ is appropriate for environmental monitoring, as well as PHT applications such as HVAC and weather stations.

PHT Click is supported by a mikroSDK compliant library, which includes functions that simplify software development.

PHT Click is based on the MS8607, a digital combination sensor providing 3 environmental measurements all-in-one: pressure, humidity, and temperature from TE Connectivity. The MS8607 includes two sensors based on the MEMS technologies used to measure pressure, humidity, and temperature. The first is a piezo-resistive sensor providing pressure and temperature measurements, and the second sensor is a capacitive type humidity sensor providing relative humidity measurement. Each sensor is interfaced to a ΔΣ ADC integrated circuit for the digital conversion. The MS8607 converts both analog output voltages to a 24-bit digital value for the pressure and temperature measurements and a 12-bit digital value for the relative humidity measurement.

Pressure measurement accuracy comes in at +/- 2 mbar, relative humidity at +/- 3% RH, and the temperature within 1°C. One standout feature of the MS8607 is it’s very respectable low power consumption at as low as 0.78 µA. Perfect for sensing general weather conditions, the MS8607 really shines for high altitude low-pressure applications. Capable of sensing down to 10mbar, the MS8607 is simple to use and gives the user some powerful readings with very little power and conversion time.

PHT Click communicates with MCU using the standard I2C 2-Wire interface with a maximum clock frequency of 400kHz. Since the sensor is supplied with 3.3V logic voltage level only, also featured on this Click board™ is a PCA9306 voltage-level translator from Texas Instruments. The I2C interface bus lines are routed to the dual bidirectional voltage-level translator that allows this Click board™ to be interfaced with both 3.3V and 5V MCUs.

This Click board™ is designed to be operated with both 3.3V and 5V logic voltage levels that can be selected via VCC SEL jumper. This allows for both 3.3V and 5V capable MCUs to use the I2C communication lines properly. However, the Click board™ comes equipped with a library that contains easy to use 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 or 5V
• Supply Voltage: Min. -0.3V, Typ. 3.3V, Max. 3.6V
• Operating Pressure Range: Min. 300mbar, Max. 1200mbar
• Operating Relative Humidity Range: Min. 0%RH, Max. 100%RH
• Operating Temperature Range: Min. -40°C, Max. +85°C

• Schematic
• PCA9306 Datasheet
• MS8607 Datasheet
• mikroSDK
• GitHub