#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <Keypad.h>
#include "DHT.h"

//LDC 20x4
#define I2C_ADDR    0x27
#define LCD_COLUMNS 20
#define LCD_LINES   4
LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES);



//Keypad 4x4
const uint8_t ROWS = 4;
const uint8_t COLS = 4;
char keys[ROWS][COLS] = {
  { '1', '2', '3', 'A' },
  { '4', '5', '6', 'B' },
  { '7', '8', '9', 'C' },
  { '*', '0', '#', 'D' }
};
uint8_t colPins[COLS] = { 33, 25, 26, 27 }; // Pins connected to C1, C2, C3, C4
uint8_t rowPins[ROWS] = { 18, 5, 4, 2 }; // Pins connected to R1, R2, R3, R4
char key;
Keypad keypad = Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS);

//Relay + LED
#define TempLED 15
#define HumiLED 19

//Check state for each valve
/*
  0 = close
  1 = open
*/
int valveWaterState = 0;
int valveNState = 0;
//Count time (s)
unsigned long previousTime = 0;
byte seconds;
byte real_seconds;
/////////////////////////////
char*  password = "427";
int position = 0;

void setup() {
  Serial.begin(9600);
  //Display LCD 20x4
  lcd.init();
  lcd.backlight();  // turn on backlight
  //DHT22
  //Relay LED
  pinMode(TempLED, OUTPUT);
  pinMode(HumiLED, OUTPUT);
  pinMode(32, OUTPUT);
  pinMode(35, OUTPUT);
  pinMode(14, INPUT_PULLUP);
  pinMode(34, INPUT_PULLUP);
  MainMenu();
}


void loop() {
  key = keypad.getKey();  //รับค่าจาก Keypad
  if (key) {   // if (key) {
    switch (key) {  //เลือกทำ
      case 'A': //แสดงค่าจากเซนเซอร์ 
        lcd.clear();
        while (1) {
          key = keypad.getKey();

          if (key == '*') { //กดกลับ Main Menu
            lcd.clear();
            MainMenu();
            break;
          } else {
            lcd.setCursor(0, 1);
            lcd.print("input bottle PET");
            //เช็ค Error ของ DHT22
            int val = digitalRead(14); // input bottle receive big PET 1500 CC
            int val1 = digitalRead(34); // input bottle receive big PET 1500 CC
            if (val == 0 ){
            digitalWrite(32, HIGH); //ON or 1; 
            delay(1000); // หน่วงเวลาไว้ 
            digitalWrite(32, LOW); // OFF or 0;
            delay(1000);
            digitalWrite(32, HIGH); //ON or 1; 
            delay(1000); // หน่วงเวลาไว้ 
            digitalWrite(32, LOW); // OFF or 0;
            delay(1000);
            } 
            else if (val1 == 0 ){
            digitalWrite(35, HIGH); //ON or 1; 
            delay(1000); // หน่วงเวลาไว้ 
            digitalWrite(35, LOW); // OFF or 0;
            delay(1000);
            digitalWrite(35, HIGH); //ON or 1; 
            delay(1000); // หน่วงเวลาไว้ 
            digitalWrite(35, LOW); // OFF or 0;
            delay(1000);
            } else{
            digitalWrite(32, LOW); // OFF or 0;
            digitalWrite(35, LOW); // OFF or 0;
            }
          
            //แสดงข้อความ
            //lcd.setCursor(0, 2);
            //lcd.print("System running . . .");
            lcd.setCursor(0, 3);
            lcd.print("Press * back to Menu");
            /*
              //หน่วงเวลา
              delay(1000);
              //ล้างจอ LCD
              lcd.clear();
            */
          }
        }
        break;

      default:  //แจ้งเตือนหากกดนอกเหลือจากที่กำหนด
        lcd.clear();
        while (1) {
          key = keypad.getKey();

          if (key == '*') {  //กดกลับ Main Menu
            lcd.clear();
            MainMenu();
            break;
          } else {  //แสดงข้อความแจ้งเตือน
            MainMenu();
          }
        };
    }
  }
}

void MainMenu() {
  lcd.setCursor(0, 0);
  lcd.print("Press A-C to Select");
  lcd.setCursor(0, 1);
  lcd.print("Press A - Sensor");
  lcd.setCursor(0, 2);
  lcd.print("Press B - Valve");
  lcd.setCursor(0, 3);
  lcd.print("Press C - Setting");
}