// Brake Condition Monitoring System

const int tempPin = A0;      // Temperature potentiometer
const int pressurePin = A1;  // Pressure potentiometer

const int redLED = 7;        // Warning LED
const int greenLED = 6;      // Normal LED
const int buzzer = 8;        // Buzzer

const int TEMP_LIMIT = 120;      // Temperature threshold (°C)
const int PRESSURE_MIN = 20;     // Minimum pressure (bar)
const int PRESSURE_MAX = 80;     // Maximum pressure (bar)

void setup() {
  Serial.begin(9600);

  pinMode(redLED, OUTPUT);
  pinMode(greenLED, OUTPUT);
  pinMode(buzzer, OUTPUT);

  Serial.println("Brake Condition Monitoring System Started");
}

void loop() {

  // Read potentiometers
  int tempRaw = analogRead(tempPin);
  int pressureRaw = analogRead(pressurePin);

  // Convert to engineering values
  int temperature = map(tempRaw, 0, 1023, 0, 150);
  int pressure = map(pressureRaw, 0, 1023, 0, 100);

  Serial.print("Temperature: ");
  Serial.print(temperature);
  Serial.println(" C");

  Serial.print("Pressure: ");
  Serial.print(pressure);
  Serial.println(" Bar");

  // Check brake condition
  if (temperature > TEMP_LIMIT) {

    Serial.println("WARNING: Brake Overheating!");

    digitalWrite(redLED, HIGH);
    digitalWrite(greenLED, LOW);

    tone(buzzer, 1000);

  }
  else if (pressure < PRESSURE_MIN || pressure > PRESSURE_MAX) {

    Serial.println("WARNING: Brake Pressure Fault!");

    digitalWrite(redLED, HIGH);
    digitalWrite(greenLED, LOW);

    tone(buzzer, 1000);

  }
  else {

    Serial.println("Brake System Normal");

    digitalWrite(redLED, LOW);
    digitalWrite(greenLED, HIGH);

    noTone(buzzer);
  }

  Serial.println("-----------------------------");

  delay(1000);
}