Library Description

Library contains functions for getting temperature and humidity. Library contains functions for getting and setting user register. Library contains functions for changing resolution and soft reset. Library contains functions for enabling/disabling heater and OTP.

Key functions:

• float temphum13_getTemperature(void) - This function issues hold temperature measurement command, calculates CRC for temperature value, compares two CRC values and calculates temperature value.
• float temphum13_getHumidity(void) - This function issues hold humidity measurement, calculates CRC for humidity value, compares two CRC values and calculates humidity value.
• void temphum13_setUserRegister( uint8_t register_content ) - sets user register content.

Examples description

The application is composed of three sections :

• System Initialization - Initializes I2C and LOG modules.
• Application Initialization - Initializes I2C driver and issues soft reset command
• Application Task - Measures temperature and humidity values, checks if they are valid and logs them if they are

void applicationTask( )
{
    temperature = temphum13_getTemperature( );
    humidity = temphum13_getHumidity( );
    
    if (temperature != 65536.0)
    {
        FloatToStr( temperature, text );
        FloatCut( );
        mikrobus_logWrite( "> Temperature : ", _LOG_TEXT );
        mikrobus_logWrite( text, _LOG_TEXT );
        mikrobus_logWrite( celsius, _LOG_LINE );
    }

    if (humidity != 65536.0)
    {
        FloatToStr( humidity, text );
        FloatCut( );
        mikrobus_logWrite( "> Humidity    : ", _LOG_TEXT );
        mikrobus_logWrite( text, _LOG_TEXT );
        mikrobus_logWrite( " %RH", _LOG_LINE );
    }
    
    mikrobus_logWrite( " ", _LOG_LINE );
    Delay_ms(500);
}

Additional Functions :

• FloatCut() - Rounds float number to two decimals

Other Mikroe Libraries used in the example:

• I2C
• UART
• Conversions

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.