Print serial then starting loop forever

[ErfanDL]

Hi guys. I want to print an integer with if(Serial) then starting the loop for ever but can't success. anyone can help ?

I want print "Customer1000", wait for 4 seconds then starting analog A0 in loop forever.

thanks and sorry for bad english.

String  id = "Customer1000";

void setup()
{
  Serial.begin(115200);
}

void loop()
{
    int sensorValue = analogRead(A0);
  if (Serial) {
    Serial.print(id);
    delay(4000);
  }
  Serial.println(sensorValue);
}

[J-M-L]

If you want to do something only once, have that in the setup

void setup() {
  Serial.begin(115200);
  while(!Serial); // only needed on some arduino. Will block if no serial link can be established
  Serial.print(F("Customer1000"));
  delay(4000);
}

void loop() {
  Serial.println(analogRead(A0));
}

[gilshultz]

I would suggest adding a delay in the loop otherwise you will flood the serial port.

[J-M-L]

@gilshultz

otherwise you will flood the serial port

Not sure what you mean by flood
print() will block if the outgoing buffer is full, but there is probably little point reading that fast