#define LED1 4

#define bufsize 7
#define CLEAR 0

int buf[bufsize] = {0}; // buffer initialization

void SerialRecordArray()
{
  if (Serial1.available())
  {
    digitalWrite(LED_BUILTIN, HIGH);  //BUILTIN LED ON : Serial Data Receive
    for (int i = 0; i < (bufsize + 1); i++)
    {
      if (Serial1.available())
      {
        buf[i] = Serial1.read();
        delay(1);
      }
    }
    for (int i = 0; i < (bufsize + 1); i++)
    {
      Serial.print(buf[i]);
      Serial.print(" ");
    }
    Serial.print("\n");
  }
  digitalWrite(LED_BUILTIN, LOW); //BUILTIN LED OFF : Serial Data End
}

void SerialInputSignalSwitchONOFF()
{
  if (((buf[0] == 0x39) && (buf[1] == 0x52) && (buf[3] == 0xFF) && (buf[4] == 0xFF) && (buf[5] == 0xFF)) == 1)
  {
    if (buf[2] == 0x00)
    {
      //memset(buf, 0, sizeof(buf)*bufsize);
      buf[bufsize] = {0};
      digitalWrite(LED1, LOW);
    }
    else if (buf[2] == 0x01)
    {
      //memset(buf, 0, sizeof(buf)*bufsize);
      buf[bufsize] = {0};
      digitalWrite(LED1, HIGH);
    }
    else
    {
      //memset(buf, 0, sizeof(buf)*bufsize);
      buf[bufsize] = {0};
      digitalWrite(LED_BUILTIN, LOW);
      digitalWrite(LED1, LOW);
    }
  }
}

void setup()
{
  Serial.begin(9600);  //Input <- 디바이스
  Serial1.begin(115200);  //Output -> 모니터
  pinMode(LED_BUILTIN, OUTPUT); //LED Setting
  pinMode(LED1, OUTPUT);
  //memset(buf, 0, sizeof(buf)*bufsize);
  buf[bufsize] = {0};
}

void loop()
{
  SerialRecordArray();
  SerialInputSignalSwitchONOFF();
}