Ambient 16 Click

Ambient 16 Click is a compact add-on board used to measure the amount of the present ambient light. This board features the BH1726NUC, a 16-bit digital-output ambient light sensor with an I2C interface from Rohm Semiconductor. The BH1726NUC can detect a wide range of illuminance up to 30klx and provides excellent responsivity close to the human eyes' response. It is designed to control the brightness in various applications based on ambient light availability, brightness for optimum visibility, and energy efficiency.

Click Product page

Click library

• Author : Stefan Ilic
• Date : Nov 2021.
• Type : I2C type

Software Support

We provide a library for the Ambient 16 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 Ambient 16 Click driver.

Standard key functions :

• ambient16_cfg_setup Config Object Initialization function.

  void ambient16_cfg_setup ( ambient16_cfg_t *cfg );

• ambient16_init Initialization function.

  err_t ambient16_init ( ambient16_t *ctx, ambient16_cfg_t *cfg );

• ambient16_default_cfg Click Default Configuration function.

  err_t ambient16_default_cfg ( ambient16_t *ctx );

Example key functions :

• ambient16_get_part_id Ambient 16 get part ID function.

  err_t ambient16_get_part_id ( ambient16_t *ctx, uint8_t *part_id );

• ambient16_set_gain Ambient 16 set ADC gain function.

  err_t ambient16_set_gain ( ambient16_t *ctx, uint8_t data0_gain, uint8_t data1_gain );

• ambient16_read_data Ambient 16 get data in lux function.

  err_t ambient16_read_data ( ambient16_t *ctx, float *data0, float *data1 );

Example Description

This is an example that demonstrates the use of the Ambient 16 Click board by measuring illuminance and displaying the value in Lux.

The demo application is composed of two sections :

Application Init

Initializes I2C driver performs software reset and applies default settings.

void application_init ( void ) 
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    ambient16_cfg_t ambient16_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.
    ambient16_cfg_setup( &ambient16_cfg );
    AMBIENT16_MAP_MIKROBUS( ambient16_cfg, MIKROBUS_1 );
    if ( I2C_MASTER_ERROR == ambient16_init( &ambient16, &ambient16_cfg ) ) 
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }

    if ( AMBIENT16_ERROR == ambient16_default_cfg ( &ambient16 ) )
    {
        log_error( &logger, " Default configuration." );
        for ( ; ; );
    }

    uint8_t id;
    ambient16_get_part_id( &ambient16, &id );

    log_printf( &logger, "- - - - - - - - - - - - -\r\n" );
    log_printf( &logger, " Part ID = 0x%.2X \r\n", ( uint16_t ) id );
    log_printf( &logger, "- - - - - - - - - - - - -\r\n" );
    Delay_ms ( 500 );
    log_info( &logger, " Application Task " );
    log_printf( &logger, "- - - - - - - - - - - - -\r\n" );
}

Application Task

Demonstrates use of Ambient 16 Click board by reading data values of DATA0 and DATA1 in Lux every second, and logging it on the UART terminal.

void application_task ( void ) 
{
    ambient16_read_data( &ambient16, &data0, &data1 );

    log_printf( &logger, " DATA 0 = %.2f lx    \r\n", data0 );
    log_printf( &logger, " DATA 1 = %.2f lx    \r\n", data1 );
    log_printf( &logger, "- - - - - - - - - - -\r\n" );
    Delay_ms ( 1000 );
}

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.Ambient16

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.