Analog TDS Su Kalitesi ve İletkenlik Ölçüm Sensörü (PPM)

const int tdsPin = A1;

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

void loop() {
  int raw = analogRead(tdsPin);
  float voltage = raw * (5.0 / 1023.0);

  // DFRobot TDS kompanzasyon formülü (25°C referans)
  float compensationCoefficient = 1.0; 
  float compensationVoltage = voltage / compensationCoefficient;
  float tdsValue = (133.42 * pow(compensationVoltage, 3) - 255.86 * pow(compensationVoltage, 2) + 857.39 * compensationVoltage) * 0.5;

  Serial.print("Voltaj: "); Serial.print(voltage, 2);
  Serial.print(" V -> TDS Değeri: ");
  Serial.print(tdsValue, 0);
  Serial.println(" ppm");

  delay(1000);
}