// Program: SerialInputDemo.ino

/*  A reference example for students to implement Ex.3 Q2
*/

int incomingByte(int/bool) = 0;     // for incoming serial data byte
int numBytes = 0;         // no. of bytes received

void setup() {
  Serial.begin(115200);   // initialize the Serial port
}

void loop() {
  // reply only when you receive data
  if (Serial.available() > 0)   // check the Serial port if a
                                // data byte is received
  {
    // check and print the no. of bytes received
    numBytes = Serial.available();
    Serial.print("No. of bytes received = ");
    Serial.println(numBytes);
    delay(1000);

    // read a data byte
    incomingByte = Serial.read();

    // print the data byte received
    Serial.print("Data byte received [printed by println()] = ");
    Serial.println(incomingByte);

    Serial.print("Data byte received [printed by write()]   = ");
    Serial.write(incomingByte);

    Serial.println();
    delay(1000);
  } else  // print when no data byte received
  {
    Serial.println("No data byte is received!");
    delay(1000);
  }
}

/* End of program */