"Temperature Control" rev_10

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    - Project: "Temperature Control"
    - Source Code NOT compiled for: ESP32 DevKit V1
    - Source Code created on: 2025-01-21 15:48:17

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/****** SYSTEM REQUIREMENTS *****/
/****** SYSTEM REQUIREMENT 1 *****/
    /* The thermostat turns the heater on and off to */
    /* maintain a temperature of 21 degrees for 100 */
    /* seconds. rtos is used. */
/****** END SYSTEM REQUIREMENTS *****/

/* START CODE */

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

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

/***** DEFINITION OF DIGITAL INPUT PINS *****/
const uint8_t Temp_Sensor_DS18B20_DQ_PIN_D4 = 4;

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

// Heater control pin
const uint8_t HEATER_PIN = 5; // Define heater control pin

// Target temperature
const float TARGET_TEMPERATURE = 21.0;

// Timing variables
unsigned long previousMillis = 0;
const long interval = 100000; // 100 seconds in milliseconds

void setup(void)
{
    // put your setup code here, to run once:
    pinMode(HEATER_PIN, OUTPUT); // Set heater pin as output
    digitalWrite(HEATER_PIN, LOW); // Ensure heater is off initially
    sensor.begin(); // Initialize the temperature sensor
}

void loop(void)
{
    // put your main code here, to run repeatedly:
    controlHeater(); // Call heater control function
}

void controlHeater(void)
{
    // Get the current temperature
    sensor.requestTemperatures();
    float currentTemperature = sensor.getTempC();

    // Check if it's time to control the heater
    unsigned long currentMillis = millis();
    if (currentMillis - previousMillis >= interval) {
        previousMillis = currentMillis; // Save the last time

        // Control the heater based on the temperature
        if (currentTemperature < TARGET_TEMPERATURE) {
            digitalWrite(HEATER_PIN, HIGH); // Turn on heater
        } else {
            digitalWrite(HEATER_PIN, LOW); // Turn off heater
        }
    }
}

/* END CODE */