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mikroSDK Library

Thermostat 3 click

Rating:

5

Author: MIKROE

Last Updated: 2019-08-28

Package Version: 1.0.0.0

mikroSDK Library: 1.0.0.0

Category: Temperature & humidity

Downloaded: 3613 times

Not followed.

License: MIT license  

Thermostat 3 Click is a general-purpose thermostat Click board designed to be used with any temperature sensor based on the MAX31855 sensor design.

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  • mikroSDK Library 2.0.0.0
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mikroSDK Library Blog

Thermostat 3 click

Thermostat 3 click

Native view of the Thermostat 3 click board.

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Thermostat 3 click

Thermostat 3 click

Front and back view of the Thermostat 3 click board.

View full image

Library Description

The library initializes and defines the SPI bus driver and drivers that offer a choice for read data form SPI lines. With functions from the library it is possible to read Internal or Thermocouple temperature data in Celsius, Kelvin or Fahrenheit. The library provides full relay control and reads fault error status.

Key functions:

  • float thermostat3_getInternalTemperature(uint8_t TempIn) - Junction (Internal) Temperature
  • float thermostat3_getThermocoupleTemperature(uint8_t TempIn) - Thermocouple Temperature (K probe)
  • void thermostat3_relayControl(uint8_t relayPos) - Relay Control

Examples description

The application is composed of three sections :

  • System Initialization - Initialzes SPI module and all the necessary GPIO pins
  • Application Initialization - Initialization driver init
  • Application Task - Waits for valid user input and executes functions based on set of valid commands
  • Commands : 'e' - Display Thermocouple temperature 'i' - Display Internal temperature 'r' - Relay control (Relay ON / OFF) 'f' - Fault flag (Active ON / OFF) '+' - Change fault flage and display fault status(ERROR / OK)
void applicationTask()
{
    uint8_t dataReady_;
    char receivedData_;
    
    thermostat3_process();
    
    dataReady_ = UART_Rdy_Ptr();

    if (dataReady_ != 0)
    {
        receivedData_ = UART_Rd_Ptr();

        switch (receivedData_)
        {
            case 'i' :
            {
                InternalTemp = thermostat3_getInternalTemperature(_THERMOSTAT3_TEMP_IN_CELSIUS);

                FloatToStr(InternalTemp, demoText);
                mikrobus_logWrite("# Internal Temperature: ", _LOG_TEXT);
                mikrobus_logWrite(demoText, _LOG_LINE);
                break;
            }
            case 'e' :
            {
                ThermocoupleTemp = thermostat3_getThermocoupleTemperature(_THERMOSTAT3_TEMP_IN_CELSIUS);

                FloatToStr(ThermocoupleTemp, demoText);
                mikrobus_logWrite("# Thermocouple Temperature: ", _LOG_TEXT);
                mikrobus_logWrite(demoText, _LOG_LINE);
                break;
            }
            case 'r' :
            {
                if(_relayFlag == 1)
                {
                    _relayFlag = 0;
                    thermostat3_relayControl(_THERMOSTAT3_RELAY_OFF);
                    mikrobus_logWrite("# Relay OFF", _LOG_LINE);
                }
                else
                {
                    _relayFlag = 1;
                    thermostat3_relayControl(_THERMOSTAT3_RELAY_ON);
                    mikrobus_logWrite("# Relay ON", _LOG_LINE);
                }
                break;
            }
            case 'f' :
            {
                if(_faultFlag == 1)
                {
                    _faultFlag = 0;
                    mikrobus_logWrite("# Fault status -- OFF", _LOG_LINE);
                }
                else
                {
                    _faultFlag = 1;
                    mikrobus_logWrite("# Fault status -- ON", _LOG_LINE);
                }
                break;
            }
            case '+' :
            {
                if(_faultFlag == 1)
                {
                    _fError++;
                    if(_fError > 3)
                    {
                        _fError = 0;
                    }
                    _displayFault(_fError);
                    _faultStatus = thermostat3_getFaultData(0x01 << _fError);
                    
                    if (_faultStatus == 1 )
                    {
                        mikrobus_logWrite(" -- ERROR", _LOG_LINE);
                    }
                    else
                    {
                        mikrobus_logWrite(" -- OK", _LOG_LINE);
                    }
                }
                else
                {
                    mikrobus_logWrite(" Fault status is OFF, Please turn ON fault status!!!", _LOG_LINE);
                }
                break;
            }
        }
    }
}

Additional Functions :

  • void _displayFault( ) - Display fault

The full application code, and ready to use projects can be found on our LibStock page.

Other mikroE Libraries used in the example:

  • SPI Library
  • UART Library
  • Conversions

Additional notes and informations

Depending on the development board you are using, you may need USB UART clickUSB 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.

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