Temp&Hum 21 Click Board™

Product Code: MIKROE-5240

How Does The Temp&Hum 21 Click Board™ Work? The Temp&Hum 21 Click Board™ is based on the the HIH8130-021-001, a highly accurate, fully-calibrated digital humidity and temperature sensor from Honeywell Sensing and Productivity Solutions. The humidity can be measured within a range of 0 to 100%RH, while the temperature sensor is designed for a range of -40 to +120°C. The typical accuracy for humidity is ±2%RH in the measuring range of 10 up to 90%RH at ambient temperature and ±0.5°C for its operating temperature range with very low power consumption. The HIH8130-021-001 communicates with MCU using the standard I2C 2-Wire interface to read and write data supporting Fast Mode operation with a clock frequency up to 400kHz, providing factory-calibrated 14-bit data to the host controller. High 14-bit humidity and 14-bit temperature sensor resolution within the application help the user's design detect the slightest relative humidity or temperature change. It also comes with an alarm feature with configurable alarm thresholds, labelled as ALH and ALL routed to the INT and AN pins of the mikroBUS™ socket for preset control at a minimum and maximum humidity and temperature.

These alarm thresholds are set to generate alarms when the actual values in the devices cross the defined threshold values. To activate the external setting of the alarm thresholds, it is necessary to populate resistors R4 and R5, which are not populated by default, to enable an external setting on an unpopulated header in the middle of the Click board™. The Temp&Hum 21 Click Board™ can operate with both 3.3V and 5V logic voltage levels selected via the VCC SEL jumper. This way, it is allowed for both 3.3V and 5V capable MCUs to use the communication lines properly. 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 Temperature & humidity Applications Can be used for various temperature and humidity-related applications in industrial, medical, and other applications On-board modules HIH8130-021-001 - digital humidity and temperature sensor from Honeywell Sensing and Productivity Solutions Key Features Industry-leading long-term stability and reliability, fully-calibrated and temperature-compensated, high precision and accuracy, I2C interface with alarm functions, low power consumption, and more Interface I2C Compatibility mikroBUS Click board size S (28.6 x 25.4 mm) Input Voltage 3.3V or 5V PINOUT DIAGRAM This table shows how the pinout of the Temp&Hum 21 Click Board™ corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns). Notes Pin Pin Notes Alarm Low Threshold ALL 1 AN PWM 16 NC NC 2 RST INT 15 ALH Alarm High Threshold 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 VCC SEL Left Logic Level Voltage Selection 3V3/5V: Left position 3V3, Right position 5V J1 EXT_ALR Unpopulated External Alarm Threshold Connection Header TEMP&HUM 21 CLICK ELECTRICAL SPECIFICATIONS Description Min Typ Max Unit Supply Voltage 3.3 -