pir2

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PIR 2 Click

PIR 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.

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Click Library

• Author : Stefan Ilic
• Date : Dec 2023.
• Type : ADC/I2C type

Software Support

Example Description

This example demonstrates the use of PIR 2 Click boards.

Example Libraries

• MikroSDK.Board
• MikroSDK.Log
• Click.PIR2

Example Key Functions

• pir2_cfg_setup Config Object Initialization function.

void pir2_cfg_setup ( pir2_cfg_t *cfg );

• pir2_init Initialization function.

err_t pir2_init ( pir2_t *ctx, pir2_cfg_t *cfg );

• pir2_read_raw_adc This function reads raw ADC value.

err_t pir2_read_raw_adc ( pir2_t *ctx, uint16_t *raw_adc );

• pir2_read_voltage This function reads raw ADC value and converts it to proportional voltage level.

err_t pir2_read_voltage ( pir2_t *ctx, float *voltage );

• pir2_set_vref This function sets the voltage reference for PIR 2 Click driver.

err_t pir2_set_vref ( pir2_t *ctx, float vref );

Application Init

Initializes the driver and selects the driver interface.

void application_init ( void )
{
    log_cfg_t log_cfg;      /**< Logger config object. */
    pir2_cfg_t pir2_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 " );

    pir2_drv_interface_sel( &pir2_cfg, PIR2_DRV_SEL_I2C );

    // Click initialization.
    pir2_cfg_setup( &pir2_cfg );
    PIR2_MAP_MIKROBUS( pir2_cfg, MIKROBUS_1 );
    err_t init_flag = pir2_init( &pir2, &pir2_cfg );
    if ( ( ADC_ERROR == init_flag ) || ( I2C_MASTER_ERROR == init_flag ) )
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }

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

Application Task

It checks if the sensor has detected movement and displays message on the USB UART.

void application_task ( void ) 
{
    float voltage = 0;
    pir2_read_voltage ( &pir2, &voltage );
    if ( voltage > PIR2_VOLTAGE_TRESHOLD )
    {
        log_printf( &logger, " Motion detected \r\n" );
        Delay_ms ( 1000 );
    }
}

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.

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