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I tried Serial.print an array I had made, but the Arduino displays nothing in the monitor.

I tried doing Serial.print("Hehehe"); as a test, but it just displayed "h?h?h?".

The monitor works fine with other sketches than this one.

Anyone knows why?

int my_array[10];

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);

  for (int i = 0; i < 10; i++){
    my_array[i] = i * 5;

  }
}

void loop() {
  // put your main code here, to run repeatedly:
    for (int i = 0; i < 10; i++){
      Serial.print(my_array[i]);
      Serial.print(" ");
    }
    Serial.println();
    delay(1000);
}
  • do you have 9600 baud set in Serial Monitor? – Juraj Mar 10 at 18:52
  • @Juraj I have set it to 9600. – GeorgeWTrump Mar 10 at 18:58
  • 2
    In setup() you write to undefined memory my_array[10]. It's undefined if that hurts or not. – DataFiddler Mar 10 at 19:00
  • @DataFiddler I don't quite understand. The sequence is filled in the function that takes i + 5. – GeorgeWTrump Mar 10 at 19:14
  • i < 11 it should be 10 – Juraj Mar 10 at 19:37
0

Test on my Arduino Uno, your code works fine with a simple copy-paste. Remember to set the proper baud rate.

| improve this answer | |
  • Must be something faulty with my own Arduino then. Thank you for the answer though :) – GeorgeWTrump Mar 10 at 21:24
  • Load a blink sketch and check if the blink speed is correct. (Should have accuracy of at least 1/1000). – DataFiddler Mar 11 at 13:31

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