temphum24

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TempHum 24 Click

TempHum 24 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 : Stefan Filipovic
• Date : Mar 2023.
• Type : I2C type

Software Support

Example Description

This example demonstrates the use of Temp & Hum 24 Click board by reading the temperature and humidity data.

Example Libraries

• MikroSDK.Board
• MikroSDK.Log
• Click.TempHum24

Example Key Functions

• temphum24_cfg_setup Config Object Initialization function.

void temphum24_cfg_setup ( temphum24_cfg_t *cfg );

• temphum24_init Initialization function.

err_t temphum24_init ( temphum24_t *ctx, temphum24_cfg_t *cfg );

• temphum24_default_cfg Click Default Configuration function.

err_t temphum24_default_cfg ( temphum24_t *ctx );

• temphum24_read_temp_and_rh This function reads the temperature in celsius and the relative humidity level in percents.

err_t temphum24_read_temp_and_rh ( temphum24_t *ctx, float *temp, float *hum );

• temphum24_read_temp_history This function reads the temperature minimum and maximum values since the beginning of the measurements.

err_t temphum24_read_temp_history ( temphum24_t *ctx, float *temp_min, float *temp_max );

• temphum24_read_rh_history This function reads the relative humidity minimum and maximum values since the beginning of measurements.

err_t temphum24_read_rh_history ( temphum24_t *ctx, float *hum_min, float *hum_max );

Application Init

Initializes the driver and performs the Click default configuration which resets the device and starts the auto measurement mode with data rate of 1 Hz.

void application_init ( void )
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    temphum24_cfg_t temphum24_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.
    temphum24_cfg_setup( &temphum24_cfg );
    TEMPHUM24_MAP_MIKROBUS( temphum24_cfg, MIKROBUS_1 );
    if ( I2C_MASTER_ERROR == temphum24_init( &temphum24, &temphum24_cfg ) ) 
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }
    
    if ( TEMPHUM24_ERROR == temphum24_default_cfg ( &temphum24 ) )
    {
        log_error( &logger, " Default configuration." );
        for ( ; ; );
    }
    
    log_info( &logger, " Application Task " );
}

Application Task

Reads the temperature (degrees C) and the relative humidity (%RH) data and displays the results on the USB UART approximately once per second. It also reads and displays the minimum and maximum values measured since the beginning of measurements.

void application_task ( void )
{
    float temp = 0, hum = 0;
    if ( TEMPHUM24_OK == temphum24_read_temp_and_rh ( &temphum24, &temp, &hum ) )
    {
        float min_temp = 0, max_temp = 0;
        float min_rh = 0, max_rh = 0;
        log_printf ( &logger, " Temperature: %.2f C\r\n", temp );
        if ( TEMPHUM24_OK == temphum24_read_temp_history ( &temphum24, &min_temp, &max_temp ) )
        {
            log_printf ( &logger, " MIN: %.2f C\r\n MAX: %.2f C\r\n", min_temp, max_temp );
        }
        log_printf ( &logger, "\r\n Humidity: %.1f %%RH\r\n", hum );
        if ( TEMPHUM24_OK == temphum24_read_rh_history ( &temphum24, &min_rh, &max_rh ) )
        {
            log_printf ( &logger, " MIN: %.1f %%RH\r\n MAX: %.1f %%RH\r\n", min_rh, max_rh );
        }
        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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