bedebah arduino

const int in = A0;
const int out = 3;
int sensorValue = 0;
int outputValue = 0;
String inData;
String newdata;

void setup() {
  // initialize serial communications at 9600 bps:
  Serial.begin(9600);
}

void loop() {

    char recieved= (char)Serial.read();
    if ((' ' <= recieved) && (recieved <= '~')){
      inData+=recieved;
    }

      if(inData == "BEGINSCAN"){
        sensorValue=analogRead(in);
        outputValue = map(sensorValue, 0, 1023, 0, 255);
        analogWrite(out, outputValue);

        if(outputValue>=0&&outputValue<62){
          Serial.println("Blood:A");
          inData = "";
        }else if(outputValue>=62&&outputValue<107){
          Serial.println("Blood:B");
          inData = "";
        }else if(outputValue>=107&&outputValue<160){
          Serial.println("Blood:AB");
          inData = "";
        }else if(outputValue>=160&&outputValue<230){
          Serial.println("Blood:O");
          inData = "";
        }else{
          Serial.println("Blood:-");
        }
      }
  delay(200);
}