// Name:    Choi Ka Ho
// No.:     240021155
// Class:   EG114403/1D
// Program: EA_State-1_Project

#define BUF_SIZE 1200

char buf[BUF_SIZE] = {0};
char inChar;
bool stringComplete = false;
int i = 0;

void setup() {
  Serial.begin(9600);   //No entity ESP32 has a stable frequency
  Serial.println("Please input data");
}

void loop()
{
  while (Serial.available())
  {
    inChar = (char) Serial.read();
    if (inChar == '\n')
    {
      if (i < BUF_SIZE) {   //If input less or equal to 1200 bytes
        buf[i++] = inChar;
      }
      buf[i] = 0;          //Store all data and LF(linefeed)
      stringComplete = true;
    } else if (i < BUF_SIZE)  //If input more than 1200 bytes
    {
      buf[i++] = inChar;      //Store first 1200 bytes data.
    }                         //Not store LF(linefeed)
  }

  if (stringComplete)
  {
    Serial.print("SIZE of input data = ");
    Serial.print(i);
    Serial.println(" characters");
    Serial.print("");
    Serial.println(buf);

    stringComplete = false;
    i = 0;              //Reset data

    Serial.println("READINESS,YOU CAN INPUT AGAIN");
  }
}