const float gama = 0.7;
const float rl10 = 50;


void setup() {
  Serial.begin(115200);
  pinMode(5, INPUT);

}

void loop() {
  if(Serial.available()>0){
    String command = Serial.readStringUntil('\n');
    if(command=="licht"){
      sensor_LDR();
    }
  }
  delay(1000);
}

void sensor_LDR(){
 int analogValue = analogRead(5);
  float voltage = analogValue / 4095.0 * 5.0;
  float resistance = (5.0 * 1000.0) / (5.0 - voltage); 
  float lux = pow(rl10 * 1e3 * pow(10, gama) / resistance, 1.0 / gama); 
  Serial.print("Licht: ");
  Serial.print("Licht: ");
  Serial.print(analogValue);
  Serial.println(" lux");
}