void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
}

void loop() {
  // put your main code here, to run repeatedly:

  Serial.println("SN:182829");
  // while (Serial.available() == 0) {}     //wait for data available
  // String bufferCommand = Serial.readString();  //read until timeout
  // bufferCommand.trim();                        // remove any \r \n whitespace at the end of the String
  // if (bufferCommand == "B") {
  //   Serial.println("#Start Buffer");
  //   delay(2000);
  //   Serial.println("#Buffer Completed");
  // }

  // while (Serial.available() == 0) {}     //wait for data available
  // String SampleCommand = Serial.readString();  //read until timeout
  // SampleCommand.trim();                        // remove any \r \n whitespace at the end of the String
  // if (SampleCommand == "S") {
  //   Serial.println("#Sample Started");
  //   delay(2000);
  //   Serial.println("#Sample Completed");
  // }

  // while (Serial.available() == 0) {}     //wait for data available
  // String resultCommand = Serial.readString();  //read until timeout
  // resultCommand.trim();                        // remove any \r \n whitespace at the end of the String
  // if (resultCommand == "R") {
  //   delay(3000);
  //   Serial.println("RESULT SN 18291 1937.23 2828.11 28211.20 121829.12 REND");
  //   delay(15000);
  // }

  while (Serial.available() == 0) {}     //wait for data available
  String resultCommand = Serial.readString();  //read until timeout
  resultCommand.trim();                        // remove any \r \n whitespace at the end of the String
  if (resultCommand == "B") {
    delay(3000);
    Serial.println("ERROR 500 REND");
    delay(15000);
  }
}