Air Velocity Click

Air Velocity Click is a compact add-on board that measures direct airspeed. This board features the FS3000-1005, a surface-mount type air velocity module utilizing a MEMS thermopile-based sensor from Renesas. This I2C-configurable air velocity module features a digital output with a 12-bit resolution with a wide operational range of 0-7.2meter/second (0-16.2mph). The sensor comprises a “solid” thermal isolation technology and silicon-carbide coating to protect it from abrasive wear and water condensation.

Click Product page

Click library

• Author : Stefan Filipovic
• Date : Oct 2022.
• Type : I2C type

Software Support

We provide a library for the Air Velocity Click as well as a demo application (example), developed using MikroElektronika compilers. The demo can run on all the main MikroElektronika development boards.

Package can be downloaded/installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe github account.

Library Description

This library contains API for Air Velocity Click driver.

Standard key functions :

• airvelocity_cfg_setup Config Object Initialization function.

  void airvelocity_cfg_setup ( airvelocity_cfg_t *cfg );

• airvelocity_init Initialization function.

  err_t airvelocity_init ( airvelocity_t *ctx, airvelocity_cfg_t *cfg );

Example key functions :

• airvelocity_read_output This function reads the raw output counts by using I2C serial interface.

  err_t airvelocity_read_output ( airvelocity_t *ctx, uint16_t *out_counts );

• airvelocity_convert_counts_to_mps This function converts raw output counts to velocity in m/sec (0-7.23).

  float airvelocity_convert_counts_to_mps ( uint16_t out_counts );

Example Description

This example demonstrates the use of Air Velocity Click board by reading and displaying the output counts and air velocity in m/sec.

The demo application is composed of two sections :

Application Init

Initializes the driver and logger.

void application_init ( void )
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    airvelocity_cfg_t airvelocity_cfg;  /**< Click config object. */

    /** 
     * Logger initialization.
     * Default baud rate: 115200
     * Default log level: LOG_LEVEL_DEBUG
     * @note If USB_UART_RX and USB_UART_TX 
     * are defined as HAL_PIN_NC, you will 
     * need to define them manually for log to work. 
     * See @b LOG_MAP_USB_UART macro definition for detailed explanation.
     */
    LOG_MAP_USB_UART( log_cfg );
    log_init( &logger, &log_cfg );
    log_info( &logger, " Application Init " );

    // Click initialization.
    airvelocity_cfg_setup( &airvelocity_cfg );
    AIRVELOCITY_MAP_MIKROBUS( airvelocity_cfg, MIKROBUS_1 );
    if ( I2C_MASTER_ERROR == airvelocity_init( &airvelocity, &airvelocity_cfg ) ) 
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }

    log_info( &logger, " Application Task " );
}

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 250ms.

void application_task ( void )
{
    uint16_t out_counts;
    if ( AIRVELOCITY_OK == airvelocity_read_output ( &airvelocity, &out_counts ) )
    {
        log_printf ( &logger, " Out counts: %u\r\n", out_counts );
        log_printf ( &logger, " Air velocity: %.2f m/s\r\n\n", airvelocity_convert_counts_to_mps ( out_counts ) );
        Delay_ms ( 250 );
    }
}

The full application code, and ready to use projects can be installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe github account.

Other Mikroe Libraries used in the example:

• MikroSDK.Board
• MikroSDK.Log
• Click.AirVelocity

Additional notes and informations

Depending on the development board you are using, you may need USB UART Click, USB UART 2 Click or RS232 Click to connect to your PC, for development systems with no UART to USB interface available on the board. UART terminal is available in all MikroElektronika compilers.