R200_simple_read_arduino_uno

unsigned char ReadMulti[10] = {0XAA, 0X00, 0X27, 0X00, 0X03, 0X22, 0XFF, 0XFF, 0X4A, 0XDD};
unsigned int  timeSec       = 0;
unsigned int  timemin       = 0;
unsigned int  dataAdd       = 0;
unsigned int  incomedate    = 0;
unsigned int  parState      = 0;
unsigned int  codeState     = 0;

void setup() {
  pinMode(LED_BUILTIN, OUTPUT);
  Serial.begin(115200);
  Serial.println("Hello world.");
  Serial.write(ReadMulti, 10);
}

void loop() {
  timeSec ++ ;
  if (timeSec >= 50000) {
    timemin ++;
    timeSec = 0;
    if (timemin >= 20) {
      timemin = 0;
      digitalWrite(LED_BUILTIN, HIGH);
      Serial.write(ReadMulti, 10);
      digitalWrite(LED_BUILTIN, LOW);
    }
  }
  if (Serial.available() > 0) {
    incomedate = Serial.read();
    if ((incomedate == 0x02) & (parState == 0)) {
      parState = 1;
    }
    else if ((parState == 1) & (incomedate == 0x22) & (codeState == 0)) {
      codeState = 1;
      dataAdd = 3;
    }
    else if (codeState == 1) {
      dataAdd ++;
      if (dataAdd == 6) {
        Serial.print("RSSI:");
        Serial.println(incomedate, HEX);
      }
      else if ((dataAdd == 7) | (dataAdd == 8)) {
        if (dataAdd == 7) {
          Serial.print("PC:");
          Serial.print(incomedate, HEX);
        }
        else {
          Serial.println(incomedate, HEX);
        }
      }
      else if ((dataAdd >= 9) & (dataAdd <= 20)) {
        if (dataAdd == 9) {
          Serial.print("EPC:");
        }
        Serial.print(incomedate, HEX);
      }
      else if (dataAdd >= 21) {
        Serial.println(" ");
        dataAdd = 0;
        parState = 0;
        codeState = 0;
      }
    }
    else {
      dataAdd = 0;
      parState = 0;
      codeState = 0;
    }
  }

}//end of LOOP