Diff Press 3 Click

Diff Press 3 Click is a compact add-on board that can measure differential pressure. It features the 2513130810401, a WSEN-PDUS differential pressure sensor from Würth Elektronik. The sensor is MEMS based and uses a piezo-resistive sensing principle. It is a fully calibrated pressure sensor with 15-bit digital and 11-bit analog outputs. In addition to pressure measurement, the 2513130810401 WSEN-PDUS sensor also has an embedded temperature sensor.

Click Product page

Click library

• Author : Nenad Filipovic
• Date : May 2023.
• Type : ADC/I2C type

Software Support

We provide a library for the Diff Press 3 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 Diff Press 3 Click driver.

Standard key functions :

• diffpress3_cfg_setup Config Object Initialization function.

  void diffpress3_cfg_setup ( diffpress3_cfg_t *cfg );

• diffpress3_init Initialization function.

  err_t diffpress3_init ( diffpress3_t *ctx, diffpress3_cfg_t *cfg );

Example key functions :

• diffpress3_get_pressure Diff Press 3 get pressure function.

  err_t diffpress3_get_pressure ( diffpress3_t *ctx, float *pressure );

• diffpress3_get_temperature Diff Press 3 get temperature function.

  err_t diffpress3_get_temperature ( diffpress3_t *ctx, float *temperature );

• diffpress3_read_raw_adc Diff Press 3 read raw ADC value function.

  err_t diffpress3_read_raw_adc ( diffpress3_t *ctx, uint16_t *raw_adc, diffpress3_d_sel_t data_sel );

Example Description

This library contains API for the Diff Press 3 Click driver. This demo application shows an example of differential pressure and temperature measurement.

The demo application is composed of two sections :

Application Init

Initialization of I2C and ADC module and log UART.

void application_init ( void )
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    diffpress3_cfg_t diffpress3_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.
    diffpress3_cfg_setup( &diffpress3_cfg );
    DIFFPRESS3_MAP_MIKROBUS( diffpress3_cfg, MIKROBUS_1 );
    err_t init_flag = diffpress3_init( &diffpress3, &diffpress3_cfg );
    if ( ( ADC_ERROR == init_flag ) || ( I2C_MASTER_ERROR == init_flag ) )
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }

    log_info( &logger, " Application Task " );
    log_printf( &logger, "---------------------\r\n" );
    Delay_ms ( 100 );
}

Application Task

This example demonstrates the use of the Diff Press 3 Click board™. The demo application measures and display the Differential Pressure [kPa] and Temperature [degree Celsius] data. Results are being sent to the UART Terminal, where you can track their changes.

void application_task ( void ) 
{
    float pressure, temperature;
    if ( DIFFPRESS3_OK == diffpress3_get_pressure( &diffpress3, &pressure ) )
    {
        log_printf( &logger, " Diff Pressure: %.3f [kPa]\r\n", pressure );
        Delay_ms ( 100 );
    }
    if ( DIFFPRESS3_OK == diffpress3_get_temperature( &diffpress3, &temperature ) )
    {
        log_printf( &logger, " Temperature: %.2f [C]\r\n", temperature );
        Delay_ms ( 100 );
    }
    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.DiffPress3

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.