const int nitrogenPin = 34; // Analog pin for nitrogen sensor
const int phosphorusPin = 35; // Analog pin for phosphorus sensor
const int potassiumPin = 32; // Analog pin for potassium sensor

// Threshold values for nutrients
const int N_THRESHOLD = 300;
const int P_THRESHOLD = 300;
const int K_THRESHOLD = 300;

void setup() {
  // Initialize serial communication
 Serial.begin(960);

  // Initialize sensors (analog potentiometers in this case)
  pinMode(nitrogenPin, INPUT);
  pinMode(phosphorusPin, INPUT);
  pinMode(potassiumPin, INPUT);
}

void loop() {
  // Read sensor values
  int nitrogenValue = analogRead(nitrogenPin);
  int phosphorusValue = analogRead(phosphorusPin);
  int potassiumValue = analogRead(potassiumPin);

  // Print sensor values to Serial Monitor
  Serial.print("Nitrogen: ");
  Serial.print(nitrogenValue);
  Serial.print(" | Phosphorus: ");
  Serial.print(phosphorusValue);
  Serial.print(" | Potassium: ");
  Serial.println(potassiumValue);

  // Check nutrient levels and provide specific fertilizer advice
  String advice = "Fertilizer Advice: ";
  bool needsFertilizer = false;

  if (nitrogenValue < N_THRESHOLD) {
    advice += "Add Nitrogen. ";
    needsFertilizer = true;
  }
  if (phosphorusValue < P_THRESHOLD) {
    advice += "Add Phosphorus. ";
    needsFertilizer = true;
  }
  if (potassiumValue < K_THRESHOLD) {
    advice += "Add Potassium. ";
    needsFertilizer = true;
  }

  if (needsFertilizer) {
    Serial.println(advice);
  } else {
    Serial.println("Nutrient levels are sufficient.");
  }

  // No delay, let the loop run continuously
}