Environment click

Environment click measures temperature, relative humidity, pressure and VOC (Volatile Organic compounds gases). The click carries the BME680 environmental sensor from Bosch.

click Product page

Click library

• Author : MikroE Team
• Date : Dec 2019.
• Type : I2C/SPI type

Software Support

We provide a library for the Environment 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 Environment Click driver.

Standard key functions :

• Config Object Initialization function.

  void environment _cfg_setup ( environment _cfg_t *cfg );

• Initialization function.

  ENVIRONMENT_RETVAL environment _init ( environment _t ctx, environment _cfg_t cfg );

• Click Default Configuration function.

  void environment _default_cfg ( environment _t *ctx );

Example key functions :

• Function gets gas resistance value from BME680 chip.

  uint32_t environment_get_gas_resistance( environment_t *ctx );

• Function gets pressure value of BME680 chip.

  float environment_get_pressure( environment_t *ctx );

• Function get humidity value of BME680 chip.

  float environment_get_humidity( environment_t *ctx );

Examples Description

Example demonstrates use of the Environment click board.

The demo application is composed of two sections :

Application Init

Initialize driver and sets default configuration for BME680 chip.

void application_init ( void )
{
    log_cfg_t log_cfg;
    environment_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.

    environment_cfg_setup( &cfg );
    ENVIRONMENT_MAP_MIKROBUS( cfg, MIKROBUS_1 );
    environment_init( &environment , &cfg );
    environment_default_cfg( &environment );
}

Application Task

This is an example which demonstrates the use of Environment Click board.

void application_task ( void )
{
    //  Task implementation.

    temperature = environment_get_temperature( &environment);
    log_printf( &logger, " Temperature : %f%c", temperature, deg_cel[0]);

    humidity = environment_get_humidity( &environment );
    log_printf( &logger, "      Humidity : %f%%", humidity);

    pressure = environment_get_pressure( &environment );
    log_printf( &logger, "      Pressure : %.3fmbar", pressure);

    gas = environment_get_gas_resistance( &environment );
    log_printf( &logger, "      Gas Resistance : %ld\r\n", gas);

    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
}

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.Environment

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.