#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <Servo.h>
#include <Keypad.h>

volatile int HOUR;
volatile int MINUT;
volatile int second;
volatile int light;
String item;
LiquidCrystal_I2C mylcd(0x27,20,4);
Servo servo_3;

const byte KEYPAD_4_4_ROWS = 4;
const byte KEYPAD_4_4_COLS = 4;
char KEYPAD_4_4_hexaKeys[KEYPAD_4_4_ROWS][KEYPAD_4_4_COLS] = {
  {'1','2','3','A'},
  {'4','5','6','B'},
  {'7','8','9','C'},
  {'*','0','#','D'}
};
byte KEYPAD_4_4_rowPins[KEYPAD_4_4_ROWS] = {13, 12, 11, 10};
byte KEYPAD_4_4_colPins[KEYPAD_4_4_COLS] = {9, 8, 6, 5};
Keypad KEYPAD_4_4 = Keypad(makeKeymap(KEYPAD_4_4_hexaKeys), KEYPAD_4_4_rowPins, KEYPAD_4_4_colPins, KEYPAD_4_4_ROWS, KEYPAD_4_4_COLS);

void setup(){
  HOUR = 0;
  MINUT = 0;
  second = 0;
  light = 0;
  item = "";
  mylcd.init();
  mylcd.backlight();
  servo_3.attach(3);
  pinMode(1, OUTPUT);
  Serial.begin(9600);
  servo_3.write(0);
  delay(10);
  digitalWrite(1,HIGH);
  pinMode(A0, INPUT);
  pinMode(7, OUTPUT);
}

void loop(){
  light = analogRead(A0);
  mylcd.setCursor(1-1, 1-1);
  mylcd.print(String(HOUR) + String(":") + String(MINUT) + String(":") + String(second));
  mylcd.setCursor(1-1, 2-1);
  mylcd.print(String("light:") + String(light));
  delay(10);
  mylcd.clear();
  second = second + 1;
  if (second > 59) {
    second = 0;
    MINUT = MINUT + 1;
    if (MINUT > 59) {
      MINUT = 0;
      HOUR = HOUR + 1;
      if (HOUR > 23) {
        HOUR = 0;

      }

    }

  }
  if (MINUT > 3 && MINUT < 7) {
    digitalWrite(1,LOW);
    if (light > 40) {
      mylcd.setCursor(1-1, 3-1);
      mylcd.print("shuijiaoba");
      tone(7,3951);

    } else {
      noTone(7);
      mylcd.clear();

    }
    servo_3.write(90);
    delay(10);

  }
  if (MINUT > 10 && MINUT < 14) {
    servo_3.write(0);
    delay(10);
    digitalWrite(1,HIGH);
    if (light < 40) {
      mylcd.setCursor(4-1, 4-1);
      mylcd.print("qilaiba");
      tone(7,3951);
      item = String(item) + String(String(KEYPAD_4_4.getKey()));
      Serial.println(item);
      if (item == "123456") {
        noTone(7);
        mylcd.clear();

      }

    } else {
      tone(7,3951);

    }

  }

}