Environment 2 Click Board™

Product Code: MIKROE-4558

How Does The Environment 2 Click Board™ Work? The Environment 2 Click Board™ as its foundation uses the SHT40 and SGP40, a high-accuracy best-in-class SHT relative humidity, and a temperature sensor combined with MOx based gas sensor from Sensirion. The SHT40 offers reduced power consumption, improved accuracy specifications, and a fully calibrated digital I2C Fast Mode Plus 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 ±1.8%RH and ±0.2°C. On the other side, an additional gas sensor of this combo solution, the SGP40, provides a humidity-compensated VOC-based indoor air quality signal in addition to a temperature-controlled micro hot plate. The SHT40 shows the best performance when operated within the recommended average temperature and humidity range of 5-60°C and 20-80%RH. Long-term exposure to conditions outside 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. The output signal of the SGP40 is processed by Sensirion's VOC Algorithm, which automatically adapts to the environment the sensor is exposed to to translate the raw signal into a VOC Index. Sensing element and VOC Algorithm feature unmatched robustness against contaminating gases present in real-world applications enabling exceptional long-term stability and low drift, high reproducibility, and reliability. The Environment 2 Click Board™ communicates with MCU using the standard I2C 2-Wire interface. Since both sensors for operation requires a 3.3V logic voltage level only, this Click board™ also features the PCA9306 voltage-level translator from Texas Instruments. The I2C interface bus lines are routed to the dual bidirectional voltage-level translator, allowing this Click board™ to work with both 3.3V and 5V MCUs properly. The Environment 2 Click Board™ can operate with both 3.3V and 5V logic voltage levels selected via the VIO SEL jumper. This way, it is allowed for both 3.3V and 5V capable MCUs to properly use the I2C communication lines. However, the Click board™ comes equipped with a library containing easy-to-use functions and an example code that can be used, as a reference, for further development. SPECIFICATIONS Type Environmental Applications Can be used for indoor air quality and various temperature and humidity-related applications. On-board modules SHT40 and SGP40 - high-accuracy best-in-class SHT relative humidity, and a temperature sensor combined with MOx based gas sensor from Sensirion Key Features Low power consumption, high accuracy, covers extended operating humidity and temperature ranges, long-term stability and lifetime, and more. Interface I2C Compatibility mikroBUS Click board size M (42.9 x 25.4 mm) Input Voltage 3.3V or 5V PINOUT DIAGRAM This table shows how the pinout on Environment 2 Click corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns). Notes Pin Pin Notes NC 1 AN PWM 16 NC NC 2 RST INT 15 NC NC 3 CS RX 14 NC NC 4 SCK TX 13 NC NC 5 MISO SCL 12 SCL I2C Clock NC 6 MOSI SDA 11 SDA I2C Data Power Supply 3.3V 7 3.3V 5V 10 5V Power Supply Ground GND 8 GND GND 9 GND Ground ONBOARD SETTINGS AND INDICATORS Label Name Default Description LD1 PWR - Power LED Indicator JP1 VIO SEL Left Logic Level Voltage Selection 3V3/5V: Left position 3V3, Right position 5V