uniqueid2

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UNIQUE ID 2 Click

UNIQUE ID 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 : Milan Ivancic
• Date : Jun 2026.
• Type : I2C type

Software Support

Example Description

This example demonstrates the use of UNIQUE ID 2 Click board by reading and displaying the unique identifier, and by writing data to the memory and reading it back.

Example Libraries

• MikroSDK.Board
• MikroSDK.Log
• Click.UNIQUEID2

Example Key Functions

• uniqueid2_cfg_setup This function initializes Click configuration structure to initial values.

  void uniqueid2_cfg_setup ( uniqueid2_cfg_t *cfg );

• uniqueid2_init This function initializes all necessary pins and peripherals used for this Click board.

  err_t uniqueid2_init ( uniqueid2_t *ctx, uniqueid2_cfg_t *cfg );

• uniqueid2_default_cfg This function executes a default configuration of UNIQUE ID 2 Click board.

  err_t uniqueid2_default_cfg ( uniqueid2_t *ctx );

• uniqueid2_write_memory This function writes a desired number of data bytes to the EEPROM memory starting from the selected address.

  err_t uniqueid2_write_memory ( uniqueid2_t *ctx, uint32_t address, uint8_t *data_in, uint16_t len );

• uniqueid2_read_memory This function reads a desired number of data bytes from the EEPROM memory starting from the selected address.

  err_t uniqueid2_read_memory ( uniqueid2_t *ctx, uint32_t address, uint8_t *data_out, uint32_t len );

• uniqueid2_read_id_page This function reads a desired number of data bytes from the identification page.

  err_t uniqueid2_read_id_page ( uniqueid2_t *ctx, uint8_t offset, uint8_t *data_out, uint16_t len );

Application Init

Initializes the driver and logger, performs the default configuration and then reads and displays the UID.

void application_init ( void ) 
{
    log_cfg_t log_cfg;  
    uniqueid2_cfg_t uniqueid2_cfg;  

    LOG_MAP_USB_UART( log_cfg );
    log_init( &logger, &log_cfg );
    log_info( &logger, " Application Init " );
 
    // Click initialization.
    uniqueid2_cfg_setup( &uniqueid2_cfg );
    UNIQUEID2_MAP_MIKROBUS( uniqueid2_cfg, MIKROBUS_POSITION_UNIQUEID2 );
    if ( I2C_MASTER_ERROR == uniqueid2_init( &uniqueid2, &uniqueid2_cfg ) ) 
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }
    
    if ( UNIQUEID2_ERROR == uniqueid2_default_cfg ( &uniqueid2 ) )
    {
        log_error( &logger, " Default configuration." );
        for ( ; ; );
    }
 
    uint8_t uid[ UNIQUEID2_UID_LEN ] = { 0 };
    uint8_t cnt = 0;
 
    if ( UNIQUEID2_OK == uniqueid2_read_uid( &uniqueid2, uid ) )
    {
        log_printf( &logger, " UID: " );
        for ( cnt = 0; cnt < UNIQUEID2_UID_LEN; cnt++ )
        {
            log_printf( &logger, "%.2X ", ( uint16_t ) uid[ cnt ] );
        }
        log_printf( &logger, "\r\n" );
    }
    
    log_info( &logger, " Application Task " );
}

Application Task

Writes a desired number of bytes to the memory and then verifies if it is written correctly by reading from the same memory location and displaying the memory content on the USB UART.

void application_task ( void ) 
{
    uint8_t data_buf[ UNIQUEID2_PAGE_SIZE ] = { 0 };
 
    log_printf( &logger, "\r\n Memory address: 0x%.5lX\r\n", ( uint32_t ) STARTING_ADDRESS );
 
    /* Write first DEMO message */
    if ( strlen ( DEMO_TEXT_MESSAGE_1 ) > UNIQUEID2_PAGE_SIZE )
    {
        memcpy( data_buf, DEMO_TEXT_MESSAGE_1, UNIQUEID2_PAGE_SIZE );
    }
    else
    {
        memcpy( data_buf, DEMO_TEXT_MESSAGE_1, strlen ( DEMO_TEXT_MESSAGE_1 ) );
    }
    if ( UNIQUEID2_OK == uniqueid2_write_memory( &uniqueid2, STARTING_ADDRESS, data_buf, strlen ( DEMO_TEXT_MESSAGE_1 ) ) )
    {
        log_printf( &logger, " Write data: %s\r\n", data_buf );
    }
    Delay_ms ( 100 );
 
    /* Read first DEMO message */
    memset( data_buf, 0, sizeof ( data_buf ) );
    if ( UNIQUEID2_OK == uniqueid2_read_memory( &uniqueid2, STARTING_ADDRESS, data_buf, strlen ( DEMO_TEXT_MESSAGE_1 ) ) )
    {
        log_printf( &logger, " Read data: %s\r\n", data_buf );
    }
    Delay_ms ( 1000 );
 
    /* Write second DEMO message */
    if ( strlen ( DEMO_TEXT_MESSAGE_2 ) > UNIQUEID2_PAGE_SIZE )
    {
        memcpy( data_buf, DEMO_TEXT_MESSAGE_2, UNIQUEID2_PAGE_SIZE );
    }
    else
    {
        memcpy( data_buf, DEMO_TEXT_MESSAGE_2, strlen ( DEMO_TEXT_MESSAGE_2 ) );
    }
    if ( UNIQUEID2_OK == uniqueid2_write_memory( &uniqueid2, STARTING_ADDRESS, data_buf, strlen ( DEMO_TEXT_MESSAGE_2 ) ) )
    {
        log_printf( &logger, " Write data: %s\r\n", data_buf );
    }
    Delay_ms ( 100 );
 
    /* Read second DEMO message */
    memset( data_buf, 0, sizeof ( data_buf ) );
    if ( UNIQUEID2_OK == uniqueid2_read_memory( &uniqueid2, STARTING_ADDRESS, data_buf, strlen ( DEMO_TEXT_MESSAGE_2 ) ) )
    {
        log_printf( &logger, " Read data: %s\r\n", data_buf );
    }
 
    Delay_ms ( 1000 );
}

Note

When using uniqueid2_write_register() note that setting the DAL bit (CDA) or the WPL bit (SWP) from 0 to 1 is a permanent, irreversible action that freezes the respective register in read-only mode.

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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