pac1811

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PAC1811 Click

PAC1811 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 Filipovic
• Date : Nov 2025.
• Type : I2C type

Software Support

Example Description

This example demonstrates the use of the PAC1811 Click board for current, voltage, and power monitoring. The application reads and logs bus voltage, sense current, power values, as well as min/max and average measurements.

Example Libraries

• MikroSDK.Board
• MikroSDK.Log
• Click.PAC1811

Example Key Functions

• pac1811_cfg_setup This function initializes Click configuration structure to initial values.

  void pac1811_cfg_setup ( pac1811_cfg_t *cfg );

• pac1811_init This function initializes all necessary pins and peripherals used for this Click board.

  err_t pac1811_init ( pac1811_t *ctx, pac1811_cfg_t *cfg );

• pac1811_default_cfg This function executes a default configuration of PAC1811 Click board.

  err_t pac1811_default_cfg ( pac1811_t *ctx );

• pac1811_set_fsr This function configures full-scale ranges (FSR) for V(SENSE) and V(BUS).

  err_t pac1811_set_fsr ( pac1811_t *ctx, uint8_t vsense_fsr, uint8_t vbus_fsr );

• pac1811_refresh This function issues a REFRESH command to update measurement registers.

  err_t pac1811_refresh ( pac1811_t *ctx );

• pac1811_read_data This function reads accumulated count, voltage, current, and power data, and converts raw codes into SI units, storing the results to the output structure.

  err_t pac1811_read_data ( pac1811_t *ctx, pac1811_data_t *data_out );

Application Init

Initializes the logger and PAC1811 Click driver, then applies the default configuration.

void application_init ( void )
{
    log_cfg_t log_cfg;  
    pac1811_cfg_t pac1811_cfg;  

    LOG_MAP_USB_UART( log_cfg );
    log_init( &logger, &log_cfg );
    log_info( &logger, " Application Init " );
 
    // Click initialization.
    pac1811_cfg_setup( &pac1811_cfg );
    PAC1811_MAP_MIKROBUS( pac1811_cfg, MIKROBUS_1 );
    if ( I2C_MASTER_ERROR == pac1811_init( &pac1811, &pac1811_cfg ) ) 
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }
    
    if ( PAC1811_ERROR == pac1811_default_cfg ( &pac1811 ) )
    {
        log_error( &logger, " Default configuration." );
        for ( ; ; );
    }
    
    log_info( &logger, " Application Task " );
}

Application Task

Periodically refreshes the measurements and logs voltage, current, and power data. Updates are provided every second.

void application_task ( void )
{
    pac1811_data_t meas_data;
    if ( PAC1811_OK == pac1811_refresh ( &pac1811 ) )
    {
        Delay_ms ( 1 );
        if ( PAC1811_OK == pac1811_read_data ( &pac1811, &meas_data ) )
        {
            log_printf ( &logger, " ACC_COUNT: %lu\r\n", meas_data.acc_count );
            log_printf ( &logger, " ACC_DATA: 0x%.6LX%.8LX\r\n", meas_data.acc_data_msb, meas_data.acc_data_lsb );
            log_printf ( &logger, " VBUS: %.3f V\r\n", meas_data.vbus );
            log_printf ( &logger, " ISENSE: %.3f A\r\n", meas_data.isense );
            log_printf ( &logger, " VBUS_AVG: %.3f V\r\n", meas_data.vbus_avg );
            log_printf ( &logger, " ISENSE_AVG: %.3f A\r\n", meas_data.isense_avg );
            log_printf ( &logger, " POWER: %.3f W\r\n", meas_data.power );
            log_printf ( &logger, " VBUS_MIN: %.3f V\r\n", meas_data.vbus_min );
            log_printf ( &logger, " VBUS_MAX: %.3f V\r\n", meas_data.vbus_max );
            log_printf ( &logger, " ISENSE_MIN: %.3f A\r\n", meas_data.isense_min );
            log_printf ( &logger, " ISENSE_MAX: %.3f A\r\n", meas_data.isense_max );
            log_printf ( &logger, " POWER_MIN: %.3f W\r\n", meas_data.power_min );
            log_printf ( &logger, " POWER_MAX: %.3f W\r\n\n", meas_data.power_max );
            Delay_ms ( 1000 );
        }
    }
}

Note

Ensure that the PAC1811 Click is properly connected to measure the target load current and supply voltage.

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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