Pressure 11 Click

Pressure 11 Click is a digital barometer on a Click board™. Pressure 11 is equipped with the LPS33HW, an absolute piezoresistive pressure sensor, manufactured using a proprietary technology.

Click Product page

Click library

• Author : MikroE Team
• Date : May 2020.
• Type : I2C/SPI type

Software Support

We provide a library for the Pressure11 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 Pressure11 Click driver.

Standard key functions :

• Config Object Initialization function.

  void pressure11_cfg_setup ( pressure11_cfg_t *cfg );

• Initialization function.

  PRESSURE11_RETVAL pressure11_init ( pressure11_t ctx, pressure11_cfg_t cfg );

Example key functions :

• Functions for cheking commuincation with the chip and checking its ID.

  uint8_t pressure11_check_id ( pressure11_t *ctx );

• Functions for temperature reading.

  float pressure11_get_temperature ( pressure11_t *ctx );

• Functions for pressure reading.

  float pressure11_get_pressure ( pressure11_t *ctx );

Examples Description

This sensor offers many benefits, including low power consumption, high resolution of the pressure data, embedded thermal compensation, FIFO buffer with several operating modes, temperature measurement, etc.

The demo application is composed of two sections :

Application Init

Initializes SPI driver and checks chip ID

void application_init ( void )
{
    log_cfg_t log_cfg;
    pressure11_cfg_t cfg;

    /** 
     * 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 ----" );

    pressure11_cfg_setup( &cfg );
    PRESSURE11_MAP_MIKROBUS( cfg, MIKROBUS_1 );
    pressure11_init( &pressure11, &cfg );
}

Application Task

Reads Pressure and Temperature values and displays it on UART LOG

void application_task ( void )
{
    float temperature;
    float pressure;

    temperature = pressure11_get_temperature( &pressure11 );
    log_printf( &logger, "Temperature: %.2f \r\n", temperature );
    log_printf( &logger, " C" );

    pressure = pressure11_get_pressure( &pressure11 );
    log_printf( &logger, "Pressure:  %.2f \r\n", pressure );
    log_printf( &logger, "   hPa (mBar)" );

    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.Pressure11

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.