Temp&Hum 26 Click

How does it work?

Temp&Hum 26 Click is based on the ENS211, a high-performance temperature and humidity sensor from ScioSense that provides high-precision digital temperature and humidity measurements for a wide range of consumer and appliance applications. The ENS211 offers a typical temperature accuracy of ±0.15°C across a measurement range from -40 up to 100°C, alongside relative humidity measurements with ±2.0%RH accuracy across the full 0 to 100%RH range. With its 16-bit resolution digital output, the sensor delivers detailed and reliable environmental data, making it suitable for sensitive applications that demand consistent performance like smart appliances, consumer devices, and various other systems where accurate and stable temperature and humidity sensing is essential.

This Click board™ is designed in a unique format supporting the newly introduced MIKROE feature called "Click Snap." Unlike the standardized version of Click boards, this feature allows the main sensor/IC/module area to become movable by breaking the PCB, opening up many new possibilities for implementation. Thanks to the Snap feature, the ENS211 can operate autonomously by accessing its signals directly on the pins marked 1-8. Additionally, the Snap part includes a specified and fixed screw hole position, enabling users to secure the Snap board in their desired location.

Communication with the host microcontroller is established over an I2C interface supporting clock speeds up to 400kHz, with a fixed address of 0x44 and defined read and write access frames. To optimize power control and operational management, the board integrates the MAX40200 from Analog Devices, which enables or disables the ENS211 through the dedicated EN pin.

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

Click Snap

Click Snap is an innovative feature of our standardized Click add-on boards, designed to bring greater flexibility and optimize your prototypes. By simply snapping the PCB along predefined lines, you can easily detach the main sensor/IC/module area, reducing the overall size, weight, and power consumption - ideal for the final phase of prototyping. For more details about Click Snap, visit the official page dedicated to this feature.

Specifications

Pinout diagram

This table shows how the pinout on Temp&Hum 26 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	EN	Device Enable
	NC	2	RST	INT	15	NC
ID COMM	CS	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	NC
Ground	GND	8	GND	GND	9	GND	Ground

Onboard settings and indicators

Temp&Hum 26 Click electrical specifications

Software Support

TempHum 26 Click demo application is developed using the NECTO Studio, ensuring compatibility with mikroSDK's open-source libraries and tools. Designed for plug-and-play implementation and testing, the demo is fully compatible with all development, starter, and mikromedia boards featuring a mikroBUS™ socket.

Example Description

This example demonstrates the use of TempHum 26 Click board by reading the temperature and humidity values in periodic intervals. The device is initialized and placed into single-shot measurement mode, then both environmental values are read and logged to the USB UART. Data is updated every 200 ms.

Key Functions

• temphum26_cfg_setup This function initializes Click configuration structure to initial values.
• temphum26_init This function initializes all necessary pins and peripherals used for this Click board.
• temphum26_default_cfg This function executes a default configuration of TempHum 26 Click board.
• temphum26_start_measurement This function starts the measurement for temperature, humidity, or both depending on the selected flag.
• temphum26_read_data This function reads temperature and humidity data from the device with CRC check and data validity.

Application Init

Initializes the driver and performs the default configuration including device reset and communication check. It then logs the DIE revision number and unique ID.

Application Task

Starts a new temperature and humidity measurement, waits for the results, and logs the readings to the terminal every 200 ms.

Application Output

This Click board can be interfaced and monitored in two ways:

• Application Output - Use the "Application Output" window in Debug mode for real-time data monitoring. Set it up properly by following this tutorial.
• UART Terminal - Monitor data via the UART Terminal using a USB to UART converter. For detailed instructions, check out this tutorial.

Additional Notes and Information

The complete application code and a ready-to-use project are available through the NECTO Studio Package Manager for direct installation in the NECTO Studio. The application code can also be found on the MIKROE GitHub account.