MIKROE Temp&Hum 21 Click

Temp&Hum 21 Click is a compact add-on board representing temperature and humidity sensing solution. This board features the HIH8130-021-001, a highly accurate, fully-calibrated digital humidity and temperature sensor from Honeywell Sensing and Productivity Solutions. This sensor, characterized by its high accuracy (±2% RH and ±0.5°C over a wide operating temperature range) and high resolution, provides factory-calibrated 14-bit data to the host controller with a configurable I2C interface. It also comes with alarm features with selectable alarm thresholds by an MCU or externally. The long-term stability and reliability, alongside other features, make this Click board™ ideal for various temperature and humidity-related applications in industrial, medical, and other applications.

Temp&Hum 21 Click as its foundation uses 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, labeled 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™.

This 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.

  • Interface: I2C
  • Compatibility: mikroBUS™
  • Dimensions: 28.6 x 25.4mm
  • Input Voltage: 3.3V or 5V
  • Supply Voltage: Min. 3.3V, Max. 5V
  • Humidity Measurement Range: Min. 0%RH, Max. 100%RH
  • Humidity Accuracy: ±2%RH
  • Resolution: 14 bits
  • Temperature Accuracy: ±0.5°C
  • Operating Temperature Range: Min. -40°C, Typ. +25°C, Max. +120°C


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