PWR Meter 2 Click

PWR Meter 2 Click is a compact and accurate power monitoring Click board™, capable of measuring and monitoring voltage up to 24V and current up to 5A.

Click Product page

Click library

• Author : MikroE Team
• Date : Jan 2020.
• Type : SPI type

Software Support

We provide a library for the PwrMeter2 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 form compilers IDE(recommended way), or downloaded from our LibStock, or found on mikroE github account.

Library Description

This library contains API for PwrMeter2 Click driver.

Standard key functions :

• pwrmeter2_cfg_setup Config Object Initialization function.

  void pwrmeter2_cfg_setup ( pwrmeter2_cfg_t *cfg ); 

• pwrmeter2_init Initialization function.

  err_t pwrmeter2_init ( pwrmeter2_t *ctx, pwrmeter2_cfg_t *cfg );

• pwrmeter2_default_cfg Click Default Configuration function.

  err_t pwrmeter2_default_cfg ( pwrmeter2_t *ctx );

Example key functions :

• pwrmeter2_get_data This function gets the calculated voltage( V ), current( A ) and power( W ) data.

  err_t pwrmeter2_get_data ( pwrmeter2_t *ctx, float *voltage, float *current, float *power );

• pwrmeter2_write_reg This function writes 24-bit data to the register.

  err_t pwrmeter2_write_reg ( pwrmeter2_t *ctx, uint8_t reg, uint32_t data_in );

• pwrmeter2_read_reg This function reads the desired number of 24-bit data from the register/registers.

  err_t pwrmeter2_read_reg ( pwrmeter2_t *ctx, uint8_t reg, uint32_t *data_out, uint8_t len );

Examples Description

This app measuring and monitoring voltage up to 24V and current up to 5A.

The demo application is composed of two sections :

Application Init

Initializes device.

void application_init ( void )
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    pwrmeter2_cfg_t pwrmeter2_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.
    pwrmeter2_cfg_setup( &pwrmeter2_cfg );
    PWRMETER2_MAP_MIKROBUS( pwrmeter2_cfg, MIKROBUS_1 );
    if ( SPI_MASTER_ERROR == pwrmeter2_init( &pwrmeter2, &pwrmeter2_cfg ) )
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }

    if ( PWRMETER2_ERROR == pwrmeter2_default_cfg ( &pwrmeter2 ) )
    {
        log_error( &logger, " Default configuration." );
        for ( ; ; );
    }

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

Application Task

Gets calculated voltage, current and power data every 500 milliseconds and shows results on UART.

void application_task ( void )
{
    float voltage = 0;
    float current = 0;
    float power = 0;
    if ( PWRMETER2_OK == pwrmeter2_get_data( &pwrmeter2, &voltage, &current, &power ) )
    {
        log_printf( &logger, " U = %.3f V\r\n", voltage );
        log_printf( &logger, " I = %.3f A\r\n", current );
        log_printf( &logger, " P = %.3f W\r\n\n", power );
        Delay_ms ( 500 );
    }
}

The full application code, and ready to use projects can be installed directly form compilers IDE(recommneded) or found on LibStock page or mikroE GitHub accaunt.

Other mikroE Libraries used in the example:

• MikroSDK.Board
• MikroSDK.Log
• Click.PwrMeter2

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. The terminal available in all Mikroelektronika compilers, or any other terminal application of your choice, can be used to read the message.