SCT 013-030 3,5mm Ausgang nicht-invasiver

const byte SENSOR_PIN = A0;
const float ADC_REF_V = 5.0;
const float SENSOR_VOLT_AT_30A = 1.0;
const float SENSOR_AMP_RANGE = 30.0;

void setup() {
  Serial.begin(115200);
}

void loop() {
  const int samples = 800;
  float mittelwert = 0.0;
  float werte[samples];

  for (int i = 0; i < samples; i++) {
    werte[i] = analogRead(SENSOR_PIN) * ADC_REF_V / 1023.0;
    mittelwert += werte[i];
    delayMicroseconds(250);
  }
  mittelwert /= samples;

  float quadratSumme = 0.0;
  for (int i = 0; i < samples; i++) {
    const float acVolt = werte[i] - mittelwert;
    quadratSumme += acVolt * acVolt;
  }

  const float rmsVolt = sqrt(quadratSumme / samples);
  const float ampere = rmsVolt * SENSOR_AMP_RANGE / SENSOR_VOLT_AT_30A;
  Serial.print("AC RMS: ");
  Serial.print(ampere, 2);
  Serial.println(" A");
  delay(1000);
}