Air Velocity 2 Click

How does it work?

Air Velocity 2 Click is based on the FS3000-1015, a digital air velocity sensor module from Renesas that provides precise air velocity measurements. This MEMS-based sensor operates on the principle of a thermopile, offering a highly sensitive and reliable method for measuring airflow with a digital output resolution of 12 bits. Designed for demanding environments, the FS3000-1015 incorporates advanced “solid” thermal isolation technology and a protective silicon-carbide coating, making it resistant to surface contamination, abrasive wear, vibration, and pressure shock. It supports air velocity measurements ranging from 0 to 15 meters per second, corresponding to digital output counts between 409 and 3686.

The sensor's robust construction and compact surface-mount design make it suitable for integration into low-profile enclosures and applications that require long-term durability. Air Velocity 2 Click communicates with the host microcontroller via the standard I2C interface, operating at clock speeds up to 400kHz to ensure efficient and responsive data transmission. Its low-power operation and high accuracy make it ideal for use in applications such as data centers, HVAC systems, laminar flow controls, and air filtration or collection systems where reliable airflow monitoring 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 FS3000-1015 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.

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 Air Velocity 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
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

Air Velocity 2 Click electrical specifications

Software Support

Air Velocity 2 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 Air Velocity 2 Click board by reading and displaying the output counts and air velocity in m/sec.

Key Functions

• airvelocity2_cfg_setup This function initializes Click configuration structure to initial values.
• airvelocity2_init This function initializes all necessary pins and peripherals used for this Click board.
• airvelocity2_read_output This function reads the raw output counts by using I2C serial interface.
• airvelocity2_counts_to_mps This function converts raw output counts to velocity in m/sec (0-15).

Application Init

Initializes the driver and logger.

Application Task

Reads the output counts and converts it to air velocity in m/sec. Both values will be displayed on the USB UART approximately every 125ms.

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.