light5

---

Light 5 Click

Light 5 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 : Stefan Filipovic
• Date : Jan 2026.
• Type : I2C type

Software Support

Example Description

This example demonstrates the use of the Light 5 Click board for ambient light measurement. The application waits for a data-ready interrupt and then reads illuminance (lux) and wide-band light intensity values via the I2C interface, displaying the results on the serial terminal.

Example Libraries

• MikroSDK.Board
• MikroSDK.Log
• Click.Light5

Example Key Functions

• light5_cfg_setup This function initializes Click configuration structure to initial values.

void light5_cfg_setup ( light5_cfg_t *cfg );

• light5_init This function initializes all necessary pins and peripherals used for this Click board.

err_t light5_init ( light5_t *ctx, light5_cfg_t *cfg );

• light5_default_cfg This function executes a default configuration of Light 5 Click board.

err_t light5_default_cfg ( light5_t *ctx );

• light5_get_int_pin This function returns the INT pin logic state.

uint8_t light5_get_int_pin ( light5_t *ctx );

• light5_read_data This function reads the light intensity in lux and wide band measurement in uW/cm2.

err_t light5_read_data ( light5_t *ctx, light5_data_t *data_out );

Application Init

Initializes the logger and Light 5 Click driver and applies the default device configuration.

void application_init ( void )
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    light5_cfg_t light5_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.
    light5_cfg_setup( &light5_cfg );
    LIGHT5_MAP_MIKROBUS( light5_cfg, MIKROBUS_POSITION_LIGHT5 );
    if ( I2C_MASTER_ERROR == light5_init( &light5, &light5_cfg ) ) 
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }
    
    if ( LIGHT5_ERROR == light5_default_cfg ( &light5 ) )
    {
        log_error( &logger, " Default configuration." );
        for ( ; ; );
    }
    
    log_info( &logger, " Application Task " );
}

Application Task

Waits for the interrupt signal indicating new measurement data and reads light measurement results, which are then logged to the serial terminal.

void application_task ( void )
{
    light5_data_t light_data;

    // Wait for a data ready interrupt
    while ( light5_get_int_pin ( &light5 ) );

    if ( LIGHT5_OK == light5_read_data ( &light5, &light_data ) )
    {
        log_printf ( &logger, "Light: %.1f lux\r\n", light_data.lux );
        log_printf ( &logger, "Wide Band: %.1f uW/cm2\r\n\n", light_data.wide_band );
    }
}

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.

---