const int turbidityPin = A0; // Analog pin for turbidity sensor

void setup() {
  Serial.begin(9600); // Initialize Serial Monitor
}

void loop() {
  int sensorValue = analogRead(turbidityPin); // Read analog value from turbidity sensor
  float voltage = sensorValue * (5.0 / 1024.0); // Convert analog value to voltage
  float turbidity = mapTurbidity(voltage); // Map voltage to turbidity value

  Serial.print("Turbidity: ");
  Serial.print(turbidity);
  Serial.println(" NTU");

  delay(5); // Delay before next reading
}

float mapTurbidity(float voltage) {
  // Map voltage to turbidity value based on calibration data
  // Replace these values with your sensor's calibration data
  float turbidity = -1120.4 * sq(voltage) + 5742.3 * voltage - 4353.8;
  
  // Ensure turbidity value is within a certain range
  if (turbidity < 0) {
    turbidity = 0;
  } else if (turbidity > 3000) {
    turbidity = 3000;
  }
  
  return turbidity;
}