paccerdk

//This is how i typically handle button presses, while using a minimal amount of clock cycles / avoiding polling and still keeping it responsive:(note: interrupt callbacks should ideally be as simple as possible, so its better to have the logic outside of it.)
#include <Arduino.h>
#define GPIO_BUTTON 4
#define GPIO_LED 5

const uint16_t debounceDelay = 100;
unsigned long lastButtonPress = 0;
bool buttonPressed = false;

void IRAM_ATTR buttonInterrupt() {

paccerdk

#include <Arduino.h>
#include <ESP8266WiFi.h>
#include <Wire.h>

#define LED_BUILTIN 2

void setup()
{
  WiFi.mode( WIFI_OFF );
  WiFi.forceSleepBegin();