temphum18

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Temp&Hum 18 Click

TempHum 18 Click demo application is developed using the NECTO Studio, ensuring compatibility with mikroSDK's open-source libraries and tools. Designed for plug-and-play implementation and testing, the demo is fully compatible with all development, starter, and mikromedia boards featuring a mikroBUS™ socket.

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Click Library

• Author : Nenad Filipovic
• Date : Oct 2021.
• Type : I2C type

Software Support

Example Description

This library contains API for the Temp&Hum 18 Click driver. This demo application shows an example of relative humidity and temperature measurement.

Example Libraries

• MikroSDK.Board
• MikroSDK.Log
• Click.TempHum18

Example Key Functions

• temphum18_cfg_setup Config Object Initialization function.

void temphum18_cfg_setup ( temphum18_cfg_t *cfg );

• temphum18_init Initialization function.

err_t temphum18_init ( temphum18_t *ctx, temphum18_cfg_t *cfg );

• temphum18_default_cfg Click Default Configuration function.

err_t temphum18_default_cfg ( temphum18_t *ctx );

• temphum18_get_temp_hum Temp&Hum 18 get temperature and humidity function.

err_t temphum18_get_temp_hum ( temphum18_t *ctx, uint8_t resolution, float *temperature, float *humidity );

• temphum18_wake_up Temp&Hum 18 wake up function.

err_t temphum18_wake_up ( temphum18_t *ctx );

• temphum18_get_raw_data Temp&Hum 18 get raw data function.

err_t temphum18_get_raw_data ( temphum18_t *ctx, uint8_t resolution, int16_t *temp, uint16_t *hum, uint8_t *status );

Application Init

Initialization of I2C module and log UART. After driver initialization and default settings, the app display retrieves the sensor parameters such as temperature and relative humidity.

void application_init ( void ) 
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    temphum18_cfg_t temphum18_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.
    temphum18_cfg_setup( &temphum18_cfg );
    TEMPHUM18_MAP_MIKROBUS( temphum18_cfg, MIKROBUS_1 );
    if ( I2C_MASTER_ERROR == temphum18_init( &temphum18, &temphum18_cfg ) ) 
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }
    
    if ( TEMPHUM18_ERROR == temphum18_default_cfg ( &temphum18 ) )
    {
        log_error( &logger, " Default configuration." );
        for ( ; ; );
    }
    
    log_info( &logger, " Application Task " );
    log_printf( &logger, "-------------------------\r\n" );
    Delay_ms ( 100 );
}

Application Task

This is an example that shows the use of a Temp&Hum 18 Click board™. Logs the temperature [ degree Celsius ] and relative humidity [ % ] data. Results are being sent to the Usart Terminal where you can track their changes.

void application_task ( void ) 
{
    static float temperature;
    static float humidity;
    
    if ( temphum18_get_temp_hum( &temphum18, TEMPHUM18_RESOLUTION_14_BITS, &temperature, &humidity ) == TEMPHUM18_STATUS_VALID_DATA ) 
    {
        log_printf( &logger, "  Temperature : %.02f C\r\n  Humidity    : %.02f %%\r\n", temperature, humidity );
    } 
    else 
    {
        log_printf( &logger, "     Measurement Error\r\n\tStale Data\r\n" );    
    }
    
    log_printf( &logger, "-------------------------\r\n" );
    Delay_ms ( 1000 );
}

Application Output

This Click board can be interfaced and monitored in two ways:

• Application Output - Use the "Application Output" window in Debug mode for real-time data monitoring. Set it up properly by following this tutorial.
• UART Terminal - Monitor data via the UART Terminal using a USB to UART converter. For detailed instructions, check out this tutorial.

Additional Notes and Information

The complete application code and a ready-to-use project are available through the NECTO Studio Package Manager for direct installation in the NECTO Studio. The application code can also be found on the MIKROE GitHub account.

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