#include "Keypad.h"
#include "Wire.h"
#include "LiquidCrystal_I2C.h"


const byte ROWS = 4; //four rows
const byte COLS = 4; //four columns

char keys[ROWS][COLS] = {
  {'1','2','3','A'},
  {'4','5','6','B'},
  {'7','8','9','C'},
  {'*','0','#','D'}
};

// For Arduino Microcontroller
//byte rowPins[ROWS] = {9, 8, 7, 6}; 
//byte colPins[COLS] = {5, 4, 3, 2}; 

// For ESP8266 Microcontroller
byte rowPins[ROWS] = {2, 3, 4, 5}; 
byte colPins[COLS] = {6, 7, 9, 10}; 

// For ESP32 Microcontroller
//byte rowPins[ROWS] = {23, 22, 3, 21}; 
//byte colPins[COLS] = {19, 18, 5, 17};

Keypad keypad = Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS);
LiquidCrystal_I2C lcd(0x27, 20, 4); 

/*
  E18-D80NK-Infrared-Switch
  made on 24 oct 2020
  by Amir Mohammad Shojaee @ Electropeak
  Home
*/
const int Pin = A0; //analogRead(Pin); sensor 1
const int Pin1 = 8; //digitalRead(Pin); sensor 2  D8

int sensorValue = 0; // sensor 1
int sensorValue1 = 0; // sensor 2
int counter = 0;
int counter1 = 0;
int hitObject = false;


const int len_key = 5;
const int len_test = 5;

//char master_key[len_key]={'1','2','3','4','5'};
char master_key[len_test];
char attempt_key[len_key];
int z=0;

void setup() {
  pinMode(Pin, INPUT); //sensor 1
  pinMode(Pin1, INPUT); // sensor 2
  pinMode(13, OUTPUT);
  digitalWrite(13, LOW);
  Serial.begin(9600);
  lcd.init();
  lcd.backlight();
  lcd.setCursor(0,0);
  lcd.print("Insert ID STUDENT");
}

void loop() {

  //**** keypad****//

char key =keypad.getKey();
lcd.setCursor(z-1,1);

 if (key) {
  Serial.println(key);
  switch(key){
  case '*':
  z=0;
  break;

  case '=':
  delay(100);
  checkKEY(); // call check
  sensordata(); // sensor press '*' stop
  break;

  default:
  attempt_key[z]=key;
  lcd.print(z);
  z++;
    
  }
 }
}

void sensordata() {
  ///// ****sensor1****///////
  sensorValue = analogRead(Pin);
  Serial.print("sensorvalue_1 =");
  Serial.println(sensorValue);
  if (sensorValue <= 15) { // จูล ทวนเข็ม sensor
     counter++;
    Serial.println("detect Object_1");
    digitalWrite(13, HIGH);
    Serial.print("detect counter_1 =");
    Serial.println(counter);
    lcd.print(" sizeS ");
    lcd.setCursor(7,3);
    lcd.print(counter1);
    //delay(1500);
  }
  else {
    Serial.println("no Object");
    digitalWrite(13, LOW);
    //delay(1000);
  }
  
  /////**** sensor2****///////
  sensorValue1 = digitalRead(Pin1);
  Serial.print("sensorvalue_2 =");
  Serial.println(sensorValue1);
  if ((sensorValue1 == 0) && (hitObject == false)){ // HIGH = 1 to LOW =0
     counter1++;
    hitObject = true;
    Serial.println("detect Object_2");
    digitalWrite(13, HIGH);
    Serial.print("detect counter_2 =");
    Serial.println(counter1);
    lcd.print(" sizeX ");
    lcd.setCursor(7,2);
    lcd.print(counter1);
    
    //delay(1500);
  }
  else if ((sensorValue1 == 1) && (hitObject == true)){
    hitObject = false;
    Serial.println("no Object_2");
    digitalWrite(13, LOW);
    //delay(1000);
}
delay(1000);
}
void checkKEY()
{
   int correct=0;
   int i;
   for (i=0; i<len_key; i++) {
    if (attempt_key[i]==master_key[i]) {
      correct++;
      }
    }
   if (z==len_key){ //      (correct==len_key && z==len_key)   https://diyi0t.com/keypad-arduino-esp8266-esp32/
    lcd.setCursor(0,1);
    lcd.print("Correct Key");
    delay(3000);
    z=0;
    lcd.clear();
    lcd.setCursor(0,0);
    lcd.print("Insert ID");
   }
   else
   {
    lcd.setCursor(0,1);
    lcd.print("Incorrect ID");
    delay(3000);
    z=0;
    lcd.clear();
    lcd.setCursor(0,0);
    lcd.print("Insert ID");
   }
   for (int zz=0; zz<len_key; zz++) {
    attempt_key[zz]=0;
   }
}