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

#define ECHO_PIN 34
#define TRIG_PIN 32
int LED_BUILTIN = 23;

const int ldrPin = A0;
const int pirPin = 14;
const int motorStep = 2;
const int motorDir = 15;

AccelStepper stepper(AccelStepper::FULL4WIRE, motorStep, 13, 12, 14);

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  pinMode(LED_BUILTIN, OUTPUT);
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);

  pinMode(ldrPin, INPUT);
  pinMode(pirPin, INPUT);

  pinMode(motorStep, OUTPUT);
  pinMode(motorDir, OUTPUT);

  stepper.setMaxSpeed(2000);
  stepper.setAcceleration(1000);
}

float readDistanceCM() {
  digitalWrite(TRIG_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);
  int duration = pulseIn(ECHO_PIN, HIGH);
  return duration * 0.034 / 2;
}


void loop() {
  // put your main code here, to run repeatedly:
  float distance = readDistanceCM();

  bool isNearby = distance > 10;
  digitalWrite(LED_BUILTIN, isNearby);

  Serial.print("Measured distance: ");
  Serial.println(readDistanceCM());

  delay(100);  // this speeds up the simulation

  // Read values from LDR and PIR
  int ldrValue = analogRead(ldrPin);
  int pirValue = digitalRead(pirPin);

  // Print sensor values to the serial monitor
  Serial.print("LDR Value: ");
  Serial.println(ldrValue);
  Serial.print("PIR Value: ");
  Serial.println(pirValue);

  // Control the stepper motor based on sensor readings
  if (ldrValue < 500 && pirValue == HIGH) {
    // If it's dark and motion is detected, rotate the stepper motor
    stepper.moveTo(1000);
    stepper.run();
  } else {
    // If conditions are not met, stop the stepper motor
    stepper.stop();
    stepper.setCurrentPosition(0);
  }

  // Wait for a short time before taking the next readings
  delay(1000);
}