unsigned long id = 0;

void setup() {
  Serial.begin(1200);
}

void loop() {
  Serial.write(0x02);
  delay(100);

  Serial.print("ADCO 12345678912 ?\n");
  delay(100);

  Serial.print("OPTARIF HC.. <\n");
  delay(100);

  Serial.print("ISOUSC 45 ?\n");
  delay(100);

  Serial.print("HCHP "); Serial.print(++id); Serial.print(" .\n");
  delay(100);

  Serial.print("HCHC "); Serial.print(++id); Serial.print(" .\n");
  delay(100);

  Serial.write(0x03);
  delay(100);
}