Backpack Defender 3000

/* Buzzer Header */ #
define BUZZER_PIN 37 /* sig pin of the Grove Buzzer */
int length = 10; /* the number of notes */
char notes[] = "eeeeeeeeee "; //notes in the song

/* Countdown Header */
#include "TM1637.h"

#
define CLK 39 //pins definitions for TM1637 and can be changed to other ports
# define DIO 38
TM1637 tm1637(CLK, DIO);

/* Moisture Sensor Header*/
#
define MOISTURE_PIN 27 /* pin of Moisture Sensor */ # define THRESHOLD_VALUE 1500 /* threshold for sensing moisture */ # define LED RED_LED
int analog_value = 0; /* variable to store the value coming from Moisture Sensor */
int8_t bits[4] = {
  0
}; /* array to store the single digits of the value */

/* Light Sensor Header*/
#
define LIGHT_SENSOR 25 /* pin connected to the Light Sensor */
int analog_value_two = 0; /* variable to store the value coming from Light Sensor */

/*Button 1 Header*/
const int buttonPin = PUSH1; // the number of the pushbutton pin
int buttonState = 0;
int flag = 0;

/*Button 2 Header*/
const int buttonPinTwo = PUSH2; // the number of the pushbutton pin
int buttonStateTwo = 0;
int flag_m = 0;

void setup() {
  // put your setup code here, to run once:
  /* Buzzer setup */
  pinMode(BUZZER_PIN, OUTPUT);

  /* Countdown setup */
  tm1637.init();
  tm1637.set(BRIGHT_TYPICAL); //BRIGHT_TYPICAL = 2,BRIGHT_DARKEST = 0,BRIGHTEST = 7;

  /*Moisture Sensor setup*/
  pinMode(LED, OUTPUT);

  // initialize the pushbutton pin as an input:
  pinMode(buttonPin, INPUT_PULLUP);
  pinMode(buttonPinTwo, INPUT_PULLUP);

}

void loop() {

  /* Look for light and moisture*/
  /* read the value from the sensor */
  analog_value = analogRead(MOISTURE_PIN);

  // put your main code here, to run repeatedly: 
  int8_t NumTab[] = {
    9,
    8,
    7,
    6,
    5,
    4,
    3,
    2,
    1
  }; //0~9,A,b,C,d,E,F
  int8_t ListDisp[4];

  // read the state of the pushbutton value:

  buttonState = digitalRead(buttonPin);

  // check if the pushbutton is pressed. Arm device if pressed
  if (buttonState == LOW) {
    delay(10000);
    flag = 1;
  }

  // Buzz while moisture is detected
  if (analog_value > THRESHOLD_VALUE) {
    playTone(1915, 1000);
  }
  analog_value_two = analogRead(LIGHT_SENSOR);\
  //Start countdown if armed and light is sensed
  int t = 250;
  if (analog_value_two >= 2250 && flag)

  {

    ListDisp[1] = NumTab[0];
    tm1637.display(0, ListDisp[1]);

    //Countdown
    for (int i = 0; i < length, flag == 1; i++) {
      //Decrease seconds each iteration
      ListDisp[1] = NumTab[i];
      tm1637.display(0, ListDisp[1]);

      //Make note faster each iteration
      t = t / 1.5;
      int count = 0;
      //    buttonStateTwo = digitalRead(buttonPinTwo);
      //Make sure that a constant amount of time is elapsed between seconds
      while (count < 250 && flag) {
        //        buttonStateTwo = digitalRead(buttonPinTwo);
        if ((count + t) > 250) {
          playNote('e', 250 - count);
          count += 250;
          buttonStateTwo = digitalRead(buttonPinTwo);
          if (buttonStateTwo == LOW) {
            flag = 0;

          }
        } else if ((count + t + 83.3) > 250) {
          playNote('e', t);
          count += t;
          delay(250 - count);
          count += 250;
          buttonStateTwo = digitalRead(buttonPinTwo);
          if (buttonStateTwo == LOW) {
            flag = 0;

          }
        } else {
          playNote('e', t);
          count += t;
          delay(83.3);
          count += 83.3;
          buttonStateTwo = digitalRead(buttonPinTwo);
          if (buttonStateTwo == LOW) {
            flag = 0;

          }
        }

      }
      buttonStateTwo = digitalRead(buttonPinTwo);
      if (buttonStateTwo == LOW) {
        flag = 0;

      }

    }
    //Stop countdown until armed again
    flag -= 1;
  }

  // Read Value of second PushButton
  buttonStateTwo = digitalRead(buttonPinTwo);
  if (buttonStateTwo == LOW) {
    flag = 0;
  }
}

/* play tone */
void playTone(int tone, int duration) {
  for (long i = 0; i < duration * 1000 L; i += tone * 2) {
    digitalWrite(BUZZER_PIN, HIGH);
    delayMicroseconds(tone);
    digitalWrite(BUZZER_PIN, LOW);
    delayMicroseconds(tone);
  }
}

char name = 'e';
int tones = 1915;

void playNote(char note, int duration) {

  // play the tone corresponding to the note name
  for (int i = 0; i < 9; i++) {
    if (name == note) {
      playTone(1915, duration);
    }
  }
}