UVA Click

UVA Click is a compact add-on board used to detect solar UV index. This board features the GUVA-C32SM, an ultraviolet light sensor capable of measuring UV index between 0 to 14 from Genicom Co., Ltd. It contains the GaN-based chip die, amplifiers, ADC, digital control logic, and I2C interface circuit to measure UVA volumes, working in the spectral range of 220-370nm. The GUVA-C32M can acquire the intensity of UVA, respectively, and outputs digital count according to each intensity.

Click Product page

Click library

• Author : Stefan Filipovic
• Date : Dec 2021.
• Type : I2C type

Software Support

We provide a library for the UVA 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 UVA Click driver.

Standard key functions :

• uva_cfg_setup Config Object Initialization function.

  void uva_cfg_setup ( uva_cfg_t *cfg );

• uva_init Initialization function.

  err_t uva_init ( uva_t *ctx, uva_cfg_t *cfg );

• uva_default_cfg Click Default Configuration function.

  err_t uva_default_cfg ( uva_t *ctx );

Example key functions :

• uva_read_data This function reads the raw UVA data from registers.

  err_t uva_read_data ( uva_t *ctx, uint16_t *uva_data );

• uva_soft_reset This function executes the soft reset command.

  err_t uva_soft_reset ( uva_t *ctx );

• uva_write_register This function writes a data byte to the selected register by using I2C serial interface.

  err_t uva_write_register ( uva_t *ctx, uint8_t reg, uint8_t data_in );

Example Description

This example demonstrates the use of UVA Click board by reading and displaying the UVA data measurement results.

The demo application is composed of two sections :

Application Init

Initializes the driver and applies the Click default configuration.

void application_init ( void )
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    uva_cfg_t uva_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.
    uva_cfg_setup( &uva_cfg );
    UVA_MAP_MIKROBUS( uva_cfg, MIKROBUS_1 );
    if ( I2C_MASTER_ERROR == uva_init( &uva, &uva_cfg ) ) 
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }

    if ( UVA_ERROR == uva_default_cfg ( &uva ) )
    {
        log_error( &logger, " Default configuration." );
        for ( ; ; );
    }

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

Application Task

Reads the UVA data measurements every 100ms and displays the results on the USB UART.

void application_task ( void )
{
    uint16_t uva_data = 0;
    if ( UVA_OK == uva_read_data ( &uva, &uva_data ) )
    {
        log_printf ( &logger, " UVA data: %u \r\n\n", uva_data );
        Delay_ms ( 100 );
    }
}

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.UVA

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.