I have a YL-44/MH-FMD passive piezo buzzer hooked up to an ESP8266/NodeMCU.

It's connected like this: Buzzer ---> NodeMCU

• GND ---> G
• VCC ---> 3V
• I/O ---> D2

This code makes a clear beep.

void loop() {
  analogWrite(BUZZER, 255);
  delay(100);
  analogWrite(BUZZER, 0);
}

This code makes a weird low clicking sound, no beep.

void loop() {
  digitalWrite(BUZZER, HIGH);
  delay(1000);
  digitalWrite(BUZZER, LOW);
}

I have no idea why the second one doesn't work, as all the tutorials reference that one.

Also, why does the buzzer have a weird constant static noise and gets hot?

Am I doing something wrong in the wiring? I use no resistors, as the tutorials don't show that.