Serial.println works only inside of loop() in RP2040

Other Hardware 3rd Party Boards
1

This is my code:

void setup() {
  Serial.begin(115200);
  while (!Serial);
  delay(500); 
void loop(){
Serial.println("HELLOOO");
}

It works without any problems when put the Serial.println inside the loop() but I cant print anything when print inside the setup() for example this code

void setup() {
  Serial.begin(115200);
  while (!Serial);
  delay(500); 
  Serial.println("Setup");
}
void loop(){
}

Why Serial.println does not work inside setup()

2

Hi,

It is hard to see the problem without the full code.
Can you please upload your full code?

Also, why do you need this line?

while (!Serial);

Thanks,
Matej

3

Your code can't even compile,
maybe so?

void setup() {
  Serial.begin(115200);
  while (!Serial);
  delay(500); 
Serial.println("START");
}

void loop(){
Serial.println("HELLOOO");
}
4

It can, I just tried on arduino ide 2.0

5

You forgot to add "}" at the end of void setup()

6

I solved the problem by change.
delay(500) to delay(1000)

7

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