#define LIGHT_STRIP 21
const byte interrupt_pin = 34;
//#define interrupt_pin GPIO_NUM_34
//#define RTC_GPIO4 34
volatile byte state = LOW;
long previousMillis = 0; 
long interval = 10000;
unsigned long currentMillis = 0;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  pinMode(LIGHT_STRIP, OUTPUT);
  unlight_led();
  attachInterrupt(digitalPinToInterrupt(interrupt_pin), pir_activated, RISING );
  //(GPIO_NUM_34, GPIO_INTR_HIGH_LEVEL);
  //esp_sleep_enable_gpio_wakeup();
  esp_sleep_enable_ext0_wakeup(GPIO_NUM_34, 0);
  //esp_light_sleep_start();
  delay(1000);
  while (currentMillis - previousMillis > interval) {
    currentMillis = millis();   
      if ( state == LOW ) {
        light_led();
      }
      Serial.print("current "); Serial.print(currentMillis);
      Serial.print("previous "); Serial.println(previousMillis);
  }
  unlight_led();
  esp_deep_sleep_start();
}

void light_led() {
      state = HIGH;
      digitalWrite(LIGHT_STRIP, state);
      Serial.println("Send High");
}

void unlight_led() {
      state = LOW;
      digitalWrite(LIGHT_STRIP, state);
      Serial.println("Send Low");
      esp_light_sleep_start();
      //esp_deep_sleep_start();
}

void pir_activated(){
  currentMillis = millis();
  previousMillis = currentMillis + interval;
  Serial.println("interrupt");
}

void loop() {
/*
while (currentMillis - previousMillis > interval) {
  currentMillis = millis();   
    if ( state == LOW ) {
      light_led();
    }
    Serial.print("current "); Serial.print(currentMillis);
    Serial.print("previous "); Serial.println(previousMillis);
}
unlight_led();
  //if(currentMillis - previousMillis > interval) {
    // save the last time you blinked the LED 
  //  currentMillis = millis();   
  //  if ( state == LOW ) {
  //    light_led();
  //  }
  //  Serial.print("current "); Serial.print(currentMillis);
  //  Serial.print("previous "); Serial.println(previousMillis);
  //}
  //else {
  //  if ( state == HIGH ) {
  //    unlight_led();
  //  }
  //}

  delay(1000);
  Serial.println("Not Sleeping");
  */
}