const float ADC_VREF_V = 5.0;
const int ADC_RESOLUTION = 4095;
const int LM35 = 15;
const int ledPin1 = 23;
const int ledPin2 = 22;

// Define the segments for each digit
const byte SEG_A = 21;
const byte SEG_B = 19;
const byte SEG_C = 18;
const byte SEG_D = 5;
const byte SEG_E = 4;
const byte SEG_F = 2;
const byte SEG_G = 34;
const byte SEG_DP = 35; // Decimal point segment

// Define the pins for each digit
const byte DIGIT_1 = 32;
const byte DIGIT_2 = 33;
const byte DIGIT_3 = 25;
const byte DIGIT_4 = 26;

void setup() {
  pinMode(LM35, INPUT);
  pinMode(ledPin1, OUTPUT);
  pinMode(ledPin2, OUTPUT);
  
  pinMode(SEG_A, OUTPUT);
  pinMode(SEG_B, OUTPUT);
  pinMode(SEG_C, OUTPUT);
  pinMode(SEG_D, OUTPUT);
  pinMode(SEG_E, OUTPUT);
  pinMode(SEG_F, OUTPUT);
  pinMode(SEG_G, OUTPUT);
  pinMode(SEG_DP, OUTPUT);
  
  pinMode(DIGIT_1, OUTPUT);
  pinMode(DIGIT_2, OUTPUT);
  pinMode(DIGIT_3, OUTPUT);
  pinMode(DIGIT_4, OUTPUT);
  
  Serial.begin(115200);
}

void displayDigit(byte digit, bool dp) {
  Serial.println(digit);
  // Define the segments for each digit
  digitalWrite(DIGIT_1, LOW);
  digitalWrite(DIGIT_2, LOW);
  digitalWrite(DIGIT_3, LOW);
  digitalWrite(DIGIT_4, LOW);
  // Switch case to set segments based on the digit value
  switch (digit) {
    case 0:
      digitalWrite(SEG_A, LOW);
      digitalWrite(SEG_B, LOW);
      digitalWrite(SEG_C, LOW);
      digitalWrite(SEG_D, LOW);
      digitalWrite(SEG_E, LOW);
      digitalWrite(SEG_F, LOW);
      digitalWrite(SEG_G, HIGH);
      break;
    case 1:
      digitalWrite(SEG_A, HIGH);
      digitalWrite(SEG_B, LOW);
      digitalWrite(SEG_C, LOW);
      digitalWrite(SEG_D, HIGH);
      digitalWrite(SEG_E, HIGH);
      digitalWrite(SEG_F, HIGH);
      digitalWrite(SEG_G, HIGH);
      break;
    case 2:
      digitalWrite(SEG_A, LOW);
      digitalWrite(SEG_B, LOW);
      digitalWrite(SEG_C, HIGH);
      digitalWrite(SEG_D, LOW);
      digitalWrite(SEG_E, LOW);
      digitalWrite(SEG_F, HIGH);
      digitalWrite(SEG_G, LOW);
      break;
    case 3:
      digitalWrite(SEG_A, LOW);
      digitalWrite(SEG_B, LOW);
      digitalWrite(SEG_C, LOW);
      digitalWrite(SEG_D, LOW);
      digitalWrite(SEG_E, HIGH);
      digitalWrite(SEG_F, HIGH);
      digitalWrite(SEG_G, LOW);
      break;
    case 4:
      digitalWrite(SEG_A, HIGH);
      digitalWrite(SEG_B, LOW);
      digitalWrite(SEG_C, LOW);
      digitalWrite(SEG_D, HIGH);
      digitalWrite(SEG_E, HIGH);
      digitalWrite(SEG_F, LOW);
      digitalWrite(SEG_G, LOW);
      break;
    case 5:
      digitalWrite(SEG_A, LOW);
      digitalWrite(SEG_B, HIGH);
      digitalWrite(SEG_C, LOW);
      digitalWrite(SEG_D, LOW);
      digitalWrite(SEG_E, HIGH);
      digitalWrite(SEG_F, LOW);
      digitalWrite(SEG_G, LOW);
      break;
    case 6:
      digitalWrite(SEG_A, LOW);
      digitalWrite(SEG_B, HIGH);
      digitalWrite(SEG_C, LOW);
      digitalWrite(SEG_D, LOW);
      digitalWrite(SEG_E, LOW);
      digitalWrite(SEG_F, LOW);
      digitalWrite(SEG_G, LOW);
      break;
    case 7:
      digitalWrite(SEG_A, LOW);
      digitalWrite(SEG_B, LOW);
      digitalWrite(SEG_C, LOW);
      digitalWrite(SEG_D, HIGH);
      digitalWrite(SEG_E, HIGH);
      digitalWrite(SEG_F, HIGH);
      digitalWrite(SEG_G, HIGH);
      break;
    case 8:
      digitalWrite(SEG_A, LOW);
      digitalWrite(SEG_B, LOW);
      digitalWrite(SEG_C, LOW);
      digitalWrite(SEG_D, LOW);
      digitalWrite(SEG_E, LOW);
      digitalWrite(SEG_F, LOW);
      digitalWrite(SEG_G, LOW);
      break;
    case 9:
      digitalWrite(SEG_A, LOW);
      digitalWrite(SEG_B, LOW);
      digitalWrite(SEG_C, LOW);
      digitalWrite(SEG_D, HIGH);
      digitalWrite(SEG_E, HIGH);
      digitalWrite(SEG_F, LOW);
      digitalWrite(SEG_G, LOW);
      break;
    default:
      // Handle default case here (if needed)
      break;
  }

  // Set decimal point segment
  digitalWrite(SEG_DP, dp);
}


void loop() {
  int ADC;
  float temp;
  ADC = analogRead(LM35);
  
  float voltage = ADC * (ADC_VREF_V / ADC_RESOLUTION);
  temp = voltage * 100.0;
  
  Serial.print("Tension = ");
  Serial.print(voltage);
  Serial.println(" V");
  Serial.print("Température = ");
  Serial.print(temp);
  Serial.println(" °C");
  
  // Display temperature on the 7-segment display
  displayTemperature(temp);
  
  if (temp >= 25) {
    digitalWrite(ledPin1, HIGH);
  } else {
    digitalWrite(ledPin1, LOW);
  }

  if (temp >= 30) {
    digitalWrite(ledPin2, HIGH);
  } else {
    digitalWrite(ledPin2, LOW);
  }
  
  delay(3000);
}

void displayTemperature(float temp) {
  // Extract digits from the temperature value
  int digit1 = int(temp) / 10;
  int digit2 = int(temp) % 10;
  int digit3 = int(temp * 10) % 10;
  int digit4 = int(temp * 100) % 10;

  Serial.print(digit1);
  
  // Display digits on the 7-segment display
  digitalWrite(DIGIT_1, HIGH);
  displayDigit(digit1, false);
  
  
  digitalWrite(DIGIT_2, HIGH);
  displayDigit(digit2, true);
  
  digitalWrite(DIGIT_3, HIGH);
  displayDigit(digit3, false);
  
  
  digitalWrite(DIGIT_4, HIGH);
  displayDigit(digit4, false);
 
}