Barometer click

Barometer click carries the LPS25HB IC, which is a piezoresistive absolute pressure sensor with a measurement range from 260 to 1260 hPa.

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Click library

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

Software Support

We provide a library for the Barometer 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 Barometer Click driver.

Standard key functions :

• Config Object Initialization function.

  void barometer_cfg_setup ( barometer_cfg_t *cfg );

• Initialization function.

  BAROMETER_RETVAL barometer_init ( barometer_t ctx, barometer_cfg_t cfg );

• Click Default Configuration function.

  void barometer_default_cfg ( barometer_t *ctx );

Example key functions :

• Read temperature in degrees Celsius function

  float barometer_get_temperature_c ( barometer_t *ctx );

• Read pressure in milibars function

  float barometer_get_pressure( barometer_t *ctx );

• Check sensor status function

  uint8_t barometer_check_status ( barometer_t *ctx );

Examples Description

This application measures temperature and pressure data.

The demo application is composed of two sections :

Application Init

Initialization driver enable's - I2C, set default configuration and start write log.

void application_init ( void )
{
    log_cfg_t log_cfg;
    barometer_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 ----" );

    //  Click initialization.

    barometer_cfg_setup( &cfg );
    BAROMETER_MAP_MIKROBUS( cfg, MIKROBUS_1 );
    barometer_init( &barometer, &cfg );

    barometer_default_cfg( &barometer );

    // Check sensor id
    if ( barometer_check_id( &barometer ) != BAROMETER_DEVICE_ID )
    {
        log_printf( &logger, "   ERROR  \r\n " );
    }
    else
    {
        log_printf( &logger, "   Initialization  \r\n" );
    }

    log_printf( &logger, "-------------------------------- \r\n" );
    Delay_100ms( );
}

Application Task

This is a example which demonstrates the use of Barometer Click board

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

    temperature_c = barometer_get_temperature_c( &barometer );
    Delay_100ms( );

    pressure = barometer_get_pressure( &barometer );
    Delay_100ms( );

    log_printf( &logger, " Temperature : %.2f\r\n", temperature_c );

    log_printf( &logger, " Pressure    : %.2f\r\n", pressure );
    log_printf( &logger, "-------------------------------- \r\n" );

    Delay_1sec( );
}