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	- Project: "Smart Thermostat"
	- Source Code NOT compiled for: Arduino Uno
	- Source Code created on: 2024-11-03 08:12:39

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/****** SYSTEM REQUIREMENTS *****/
/****** SYSTEM REQUIREMENT 1 *****/
	/* Auto matic light ofg */
/****** END SYSTEM REQUIREMENTS *****/

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

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

/***** DEFINITION OF DIGITAL INPUT PINS *****/
const uint8_t Pratham_DS18B20_DQ_PIN_D2		= 2; // Data pin for DS18B20
const uint8_t LIGHT_PIN = 13; // Define the pin for the automatic light (LED)

/****** DEFINITION OF LIBRARIES CLASS INSTANCES*****/
// Create an instance of the DS18B20 class
DS18B20 ds(Pratham_DS18B20_DQ_PIN_D2);

// Define alarm temperature thresholds
#define LOW_ALARM 20
#define HIGH_ALARM 25

// Define the address of the DS18B20 sensor
uint8_t address[] = {40, 250, 31, 218, 4, 0, 0, 52};

void setup(void)
{
	// Initialize serial communication at 9600 baud rate
	Serial.begin(9600);
	
	// Set the data pin mode for the DS18B20 sensor
	pinMode(Pratham_DS18B20_DQ_PIN_D2, INPUT);
	
	// Set the light pin mode as output
	pinMode(LIGHT_PIN, OUTPUT);
	digitalWrite(LIGHT_PIN, LOW); // Ensure the light is off initially

	// Select the DS18B20 device using its address
	if (ds.select(address)) {
		// Set alarm thresholds for the temperature sensor
		ds.setAlarms(LOW_ALARM, HIGH_ALARM);
	} else {
		// Print an error message if the device is not found
		Serial.println("Device not found!");
	}
}

void loop(void)
{
	// Check if the DS18B20 device is selected
	if (ds.select(address)) {
		// Check if the temperature alarm has been triggered
		if (ds.hasAlarm()) {
			// Print a warning message with the current temperature
			Serial.print("Warning! Temperature is ");
			Serial.print(ds.getTempC());
			Serial.println(" C");
			
			// Turn on the light (LED) if the temperature exceeds the high alarm threshold
			if (ds.getTempC() > HIGH_ALARM) {
				digitalWrite(LIGHT_PIN, HIGH); // Turn on the light
			}
		} else {
			// Turn off the light if the temperature is within the safe range
			digitalWrite(LIGHT_PIN, LOW); // Turn off the light
		}
	} else {
		// Print an error message if the device is not found
		Serial.println("Device not found!");
	}

	// Wait for 10 seconds before the next loop iteration
	delay(10000);
}

/* END CODE */