#include <ESP32Servo.h>

//set GPIOs
const int ledBlue = 17;
const int ledRed = 18;
const int motionSensor = 27;
Servo servo1;

//set variables
unsigned long currentTime = millis();
unsigned long lastTrigger = 0;
bool startTimer = false;
bool motion = false;

//chech if motion was detected, sets LED HIGH and starts a timer
void IRAM_ATTR detectsMovement(){
  digitalWrite(ledRed, HIGH);
  startTimer = true;
  lastTrigger = millis();
}

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  servo1.attach(14);  
  pinMode(motionSensor, INPUT_PULLUP); //set motion sensor pin as interrupt, assign interrupt function and set rising mode
  attachInterrupt(digitalPinToInterrupt(motionSensor), detectsMovement, RISING);
  pinMode(ledBlue, OUTPUT);
  pinMode(ledRed, OUTPUT);

  //SET LEDs to low
  digitalWrite(ledBlue, LOW);
  digitalWrite(ledRed, LOW);
}

void loop() {
  currentTime = millis();
  if((digitalRead(ledRed) == HIGH) && (motion == false)){
    servo1.write(180);
    Serial.println("motion detected");
    motion = true;
  }

  //turn off led after number of seconds
  if (startTimer && (currentTime - lastTrigger > 5000)){
    Serial.println("motion stopped..");
    digitalWrite(ledRed, LOW);
    servo1.write(90);
    startTimer = false;
    motion = false;
  }
}