Pressure 22 Click

Pressure 22 Click is a compact add-on board that contains a board-mount pressure sensor. This board features the MS5839-02BA, an ultra-compact chlorine-resistant digital pressure and temperature sensor from TE Connectivity. The sensor is a small digital altimeter operating from 300 up to 1200mbar, optimized for applications where chlorine and saline are present. The sensor is filled with gel, which makes it robust, and enables it to work in harsh environments.

Click Product page

Click library

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

Software Support

We provide a library for the Pressure 22 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 Pressure 22 Click driver.

Standard key functions :

• pressure22_cfg_setup Config Object Initialization function.

  void pressure22_cfg_setup ( pressure22_cfg_t *cfg );

• pressure22_init Initialization function.

  err_t pressure22_init ( pressure22_t *ctx, pressure22_cfg_t *cfg );

• pressure22_default_cfg Click Default Configuration function.

  err_t pressure22_default_cfg ( pressure22_t *ctx );

Example key functions :

• pressure22_get_measurement_data Pressure 22 get the measurement data function.

  err_t pressure22_get_measurement_data ( pressure22_t *ctx, float *temperature, float *pressure );

• pressure22_get_calibration_data Pressure 22 gets the calibration data function.

  err_t pressure22_get_calibration_data ( pressure22_t *ctx );

• pressure22_get_adc_data Pressure 22 gets the ADC data function.

  err_t pressure22_get_adc_data ( pressure22_t *ctx, uint32_t *adc );

Example Description

This library contains API for Pressure 22 Click driver. The demo application reads and calculate pressure and temperature data.

The demo application is composed of two sections :

Application Init

The initialization of I2C module and log UART. After driver initialization, the app sets the default configuration.

void application_init ( void ) 
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    pressure22_cfg_t pressure22_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.
    pressure22_cfg_setup( &pressure22_cfg );
    PRESSURE22_MAP_MIKROBUS( pressure22_cfg, MIKROBUS_1 );
    if ( I2C_MASTER_ERROR == pressure22_init( &pressure22, &pressure22_cfg ) ) 
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }

    if ( PRESSURE22_ERROR == pressure22_default_cfg ( &pressure22 ) )
    {
        log_error( &logger, " Default configuration." );
        for ( ; ; );
    }

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

Application Task

This example demonstrates the use of the Pressure 22 Click board™. The demo application reads and displays the Pressure [mBar] and Temperature [degree Celsius] data. Results are being sent to the UART Terminal, where you can track their changes.

void application_task ( void ) 
{   
    static float temperature, pressure;
    if ( PRESSURE22_OK == pressure22_get_measurement_data( &pressure22, &temperature, &pressure ) )
    {
        log_printf( &logger, " Temperature : %.2f degC \r\n", temperature );
        log_printf( &logger, " Pressure    : %.2f mBar \r\n", pressure );
        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.Pressure22

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.