Maintain optimal humidity levels and protect your space from damage with SHT40, SGP40 and STM32F031K6

/*!
 * @file main.c
 * @brief Environment2 Click example
 *
 * # Description
 * This library contains API for Environment 2 Click driver.
 * The library contains drivers for measuring air quality,
 * temperature and relative humidity.
 *
 * The demo application is composed of two sections :
 *
 * ## Application Init
 * Initializes I2C driver and triggers the built-in self-test checking,
 * set heater off, performs sensors configuration and initialize VOC algorithm.
 *
 * ## Application Task
 * This is an example that demonstrates the use of the Environment 2 Click board.
 * Measured and display air quality ( raw data ), 
 * temperature ( degrees Celsius ), relative humidity ( % ) and VOC Index.
 * Results are being sent to the Usart Terminal where you can track their changes.
 * All data logs write on USB UART changes every 2 sec.
 *
 * @author Nenad Filipovic
 *
 */

#include "board.h"
#include "log.h"
#include "environment2.h"

static environment2_t environment2;
static log_t logger;

static uint16_t air_quality;
static float humidity;
static float temperature;
static int32_t voc_index;
static environment2_voc_algorithm_params voc_algorithm_params;

void application_init ( void ) {
    log_cfg_t log_cfg;                    /**< Logger config object. */
    environment2_cfg_t environment2_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.

    environment2_cfg_setup( &environment2_cfg );
    ENVIRONMENT2_MAP_MIKROBUS( environment2_cfg, MIKROBUS_1 );
    err_t init_flag = environment2_init( &environment2, &environment2_cfg );
    if ( init_flag == I2C_MASTER_ERROR ) {
        log_error( &logger, " Application Init Error. " );
        log_printf( &logger, " Please, run program again... " );

        for ( ; ; );
    }

    log_printf( &logger, "    Application Task   \r\n" );
    log_printf( &logger, "-----------------------\r\n" );
    log_printf( &logger, "  Environment 2 Click  \r\n" );
    log_printf( &logger, "-----------------------\r\n" );
    
    if ( environment2_sgp40_measure_test( &environment2 ) == ENVIRONMENT2_SGP40_TEST_PASSED ) {
        log_printf( &logger, "    All tests passed\r\n" );
        log_printf( &logger, "      Successfully\r\n" );
    } else {
        log_printf( &logger, "    One or more tests have\r\n" );
        log_printf( &logger, "     Failed\r\n" );
    }
    log_printf( &logger, "-----------------------\r\n" );
    Delay_ms ( 100 );
    
    environment2_sgp40_heater_off( &environment2 );
    Delay_ms ( 100 );
    
    environment2_config_sensors( );
    Delay_ms ( 100 );
}

void application_task ( void ) {
    environment2_get_temp_hum(  &environment2, &humidity, &temperature );
    Delay_ms ( 100 );
    
    log_printf( &logger, " Humidity    : %.2f %% \r\n", humidity );
    log_printf( &logger, " Temperature : %.2f C \r\n", temperature );
    
    environment2_get_air_quality( &environment2, &air_quality );
    Delay_ms ( 100 );
    
    log_printf( &logger, " Air Quality : %d \r\n", air_quality );
    log_printf( &logger, "- - - - - - - - - -  - \r\n" );
    
    environment2_get_voc_index( &environment2, &voc_index );
    Delay_ms ( 100 );
    
    log_printf( &logger, " VOC Index   : %d  \r\n", ( uint16_t ) voc_index );
    log_printf( &logger, "-----------------------\r\n" );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
}

int main ( void ) 
{
    /* Do not remove this line or clock might not be set correctly. */
    #ifdef PREINIT_SUPPORTED
    preinit();
    #endif
    
    application_init( );
    
    for ( ; ; ) 
    {
        application_task( );
    }

    return 0;
}

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