#include "Arduino.h"
#include "SoftwareSerial.h"
#include "DFRobotDFPlayerMini.h"

SoftwareSerial mySoftwareSerial(10, 11);
DFRobotDFPlayerMini myDFPlayer;

#define sensor 4
#define light 5
#define sound 2

bool lastValue = LOW;
bool sensorValue = LOW;

void setup() {
  
  mySoftwareSerial.begin(9600);
  Serial.begin(9600);
  pinMode(sensor, INPUT);
  pinMode(light, OUTPUT);
  pinMode(sound, OUTPUT);

  if (!myDFPlayer.begin(mySoftwareSerial)) {
    Serial.println(F("Unable to begin:"));
    Serial.println(F("1.Please recheck the connection!"));
    Serial.println(F("2.Please insert the SD card!"));
    while(true){
      delay(0);
    }
  }
  
  myDFPlayer.volume(20);
}

void loop() {

  sensorValue = digitalRead(sensor);
  /*
  Serial.print(sensorValue);
  Serial.print("\t");
  Serial.println(lastValue);
  */

  delay(50);

  if(sensorValue) {

    if(!lastValue) {
      
      myDFPlayer.play(1);

      for(int i=0; i<25; i++) {
        analogWrite(light, i*10);
        delay(random(5, 50-i));
        analogWrite(light, 0);
        delay(random(5, 50-i));
      }

      analogWrite(light, 255);
      delay(5000);
    }

  } else {
    digitalWrite(light, LOW);
  }

  lastValue = sensorValue;

}