#include <OneWire.h>
#include <DallasTemperature.h>

// Define the pins for the components
const int yellowLED = 2;
const int greenLED = 3;
const int blueLED = 4;
const int redLED = 5;
const int buzzer = 6;
const int temperatureSensorPin = A0;

// Define the temperature thresholds
const int lowTempThreshold = 35;
const int midTempThreshold = 50;
const int highTempThreshold = 90;

// Setup a oneWire instance to communicate with any OneWire devices
OneWire oneWire(temperatureSensorPin);

// Pass oneWire reference to DallasTemperature library
DallasTemperature sensors(&oneWire);

void setup() {
  // Initialize the digital pins
  pinMode(yellowLED, OUTPUT);
  pinMode(greenLED, OUTPUT);
  pinMode(blueLED, OUTPUT);
  pinMode(redLED, OUTPUT);
  pinMode(buzzer, OUTPUT);

  // Start serial communication for debugging
  Serial.begin(9600);

  // Start up the library
  sensors.begin();
}

void loop() {
  // Request temperature readings
  sensors.requestTemperatures();

  // Read the temperature from the sensor
  float tempCelsius = sensors.getTempCByIndex(0);

  // Print temperature to serial monitor
  Serial.print("Temperature: ");
  Serial.print(tempCelsius);
  Serial.println(" C");

  // Check temperature thresholds and control the lights and buzzer accordingly
  if (tempCelsius < lowTempThreshold) {
    // Blink yellow LED
    blinkLED(yellowLED);
  } else if (tempCelsius >= lowTempThreshold && tempCelsius < midTempThreshold) {
    // Blink green LED
    blinkLED(greenLED);
  } else if (tempCelsius >= midTempThreshold && tempCelsius < highTempThreshold) {
    // Blink blue LED
    blinkLED(blueLED);
  } else if (tempCelsius >= highTempThreshold && tempCelsius < 100) {
    // Blink red LED
    blinkLED(redLED);
  } else {
    // Blink red LED and sound buzzer
    blinkLED(redLED);
    soundBuzzer();
  }
}

// Function to blink an LED
void blinkLED(int pin) {
  digitalWrite(pin, HIGH);
  delay(500);
  digitalWrite(pin, LOW);
  delay(500);
}

// Function to sound the buzzer
void soundBuzzer() {
  digitalWrite(buzzer, HIGH);
  delay(1000);
  digitalWrite(buzzer, LOW);
  delay(1000);
}