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Microwave Click

Microwave 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.

Click Library

  • Author : Nemanja Medakovic
  • Date : Nov 2019.
  • Type : ADC type

Software Support

Example Description

This is an example which demonstrates the use of Microwave Click board. Microwave Click reads ADC results, takes exact amount of samples, calculation of difference between taken samples and reference ADC value, and reports movement if difference is greater/lower than selected threshold value.

Example Libraries

  • MikroSDK.Board
  • MikroSDK.Log
  • Click.Microwave

Example Key Functions

  • microwave_cfg_setup Configuration Object Setup function.
void microwave_cfg_setup ( microwave_cfg_t *cfg );
  • microwave_init Click Initialization function.
microwave_err_t microwave_init ( microwave_t *ctx, microwave_cfg_t *cfg );
  • microwave_generic_read Generic ADC Read function.
analog_in_data_t microwave_generic_read ( microwave_t *ctx );

Application Init

Initializes the ADC and uart console where the results will be displayed. Also calculates the reference ADC value for Microwave Click board.

void application_init( void )
{
    microwave_cfg_t cfg;
    log_cfg_t log_cfg;

    /** 
     * 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.
    microwave_cfg_setup( &cfg );
    MICROWAVE_MAP_MIKROBUS( cfg, MIKROBUS_1 );
    microwave_init( &microwave, &cfg );
    Delay_ms ( 100 );

    log_printf( &logger, " Calibrating the sensor...\r\n" );
    log_printf( &logger, " There must be no movement near the sensor!\r\n" );
    log_printf( &logger, "*********************************************\r\n" );

    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    sum = 0;

    for ( uint8_t cnt = 0; cnt < MICROWAVE_SAMPLES_COUNT_100; cnt++ )
    {
        sum += microwave_generic_read( &microwave );
    }

    reference = sum / MICROWAVE_SAMPLES_COUNT_100;

    log_printf( &logger, " The sensor has been calibrated!\r\n" );
    log_printf( &logger, "** Reference value: %d\r\n", reference );
    log_printf( &logger, "*********************************************\r\n" );
    Delay_ms ( 1000 );
}

Application Task

Reads the AD converted results and compares this results with the previously calculated reference value, taking into account the choosen threshold value which controls the sensor sensitivity. All data is being displayed on the USB UART where you can track their changes.

void application_task( void )
{
    microwave_data_t adc_sample;
    uint16_t detector;
    uint8_t sampler;
    uint8_t cnt = 0;

    sum = 0;

    for ( sampler = 0; sampler < MICROWAVE_SAMPLES_COUNT_100; sampler++ )
    {
        adc_sample = microwave_generic_read( &microwave );
        sum += adc_sample;
        cnt++;
    }

    if ( cnt )
    {
        detector = sum / cnt;

        if ( ( ( detector + MICROWAVE_THRESHOLD_10 ) < reference || 
               ( detector - MICROWAVE_THRESHOLD_10 ) > reference ) && 
                 old_detector != detector )
        {
            log_printf( &logger, "** MOVE DETECTED!\r\n" );
            log_printf( &logger, "** Detector value : %d\r\n", detector );
            log_printf( &logger, "**************************\r\n" );
            old_detector = detector;
            Delay_ms ( 100 );
        }
    }
}

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.