ESP32 deep sleep debounce

[horace]

I use an ESP32 to generate a 1Hz square wave on pin 16

// ESP32 generate 1Hz square wave on pin 16

void setup() {
  pinMode(16, OUTPUT);
}

void loop() {
  digitalWrite(16, HIGH);
  delay(500);
  digitalWrite(16, LOW);
  delay(500);
}

which is connected via a 0.01uF capacitor to pin 4 on the ESP32 being put into deep sleep