"Temperature Control" rev_05

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    - Project: "Temperature Control"
    - Source Code NOT compiled for: ESP32 DevKit V1
    - Source Code created on: 2025-01-21 15:32:45

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/****** SYSTEM REQUIREMENTS *****/
/****** SYSTEM REQUIREMENT 1 *****/
    /* The thermostat maintains the set temperature for */
    /* the specified time. */
/****** END SYSTEM REQUIREMENTS *****/

/* START CODE */

/****** DEFINITION OF LIBRARIES *****/
#include <DS18B20.h>  // https://github.com/matmunk/DS18B20
#include <OneWire.h>  // Required for DS18B20

/****** FUNCTION PROTOTYPES *****/
void setup(void);
void loop(void);

/***** DEFINITION OF DIGITAL INPUT PINS *****/
const uint8_t Temp_Sensor_DS18B20_DQ_PIN_D4 = 4; // Data pin for DS18B20

/****** DEFINITION OF LIBRARIES CLASS INSTANCES*****/
OneWire oneWire(Temp_Sensor_DS18B20_DQ_PIN_D4); // Create OneWire instance
DS18B20 sensor(&oneWire); // Create DS18B20 instance

// Desired temperature and time
const float setTemperature = 25.0; // Set temperature in Celsius
const unsigned long holdTime = 60000; // Hold time in milliseconds (60 seconds)
unsigned long previousMillis = 0; // Store last time temperature was set
bool temperatureMaintained = false; // Flag to check if temperature is maintained

void setup(void)
{
    Serial.begin(115200); // Initialize serial communication
    sensor.begin(); // Initialize DS18B20 sensor
}

void loop(void)
{
    // Request temperature from the sensor
    sensor.requestTemperatures();

    float currentTemperature = sensor.getTempC(); // Get current temperature

    // Check if the current temperature is below the set temperature
    if (currentTemperature < setTemperature && !temperatureMaintained) {
        Serial.println("Heating up to set temperature..."); // Debug message
        // Here, you would add code to turn on the heater (not implemented)
    }
    else if (currentTemperature >= setTemperature) {
        // If the temperature is reached, start the timer
        if (!temperatureMaintained) {
            previousMillis = millis(); // Reset timer
            temperatureMaintained = true; // Set flag to true
            Serial.println("Set temperature reached, maintaining..."); // Debug message
        }

        // Check if the hold time has elapsed
        if (millis() - previousMillis >= holdTime) {
            // Here, you would add code to turn off the heater (not implemented)
            Serial.println("Hold time elapsed, turning off heater."); // Debug message
            temperatureMaintained = false; // Reset flag
        }
    }

    // Print current temperature to serial monitor
    Serial.print("Current Temperature: ");
    Serial.println(currentTemperature);
    delay(1000); // Delay to avoid flooding the serial output
}

/* END CODE */