Keypad Controlled LED

// Example usage for Keypad_Particle library by Mark Stanley, Alexander Brevig.

#include <Keypad_Particle.h>

int led1 = D5; 

int led2 = D7;

// set up keypad buttons
const byte ROWS = 4;
const byte COLS = 3;
char keys[ROWS][COLS] = {
  {'1','2','3'},
  {'4','5','6'},
  {'7','8','9'},
  {'*','0','#'}
};
byte rowPins[ROWS] = { D3, D2, D1, D0 };
byte colPins[COLS] = { D6, D5, D4 };

// create Keypad object variable called "keypad"
Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );

// change to any secret code or command of any length
const int codeLength = 3;
char secretCode[codeLength] = {'0', '8', '5'};

int val1 = 0;
int val2 = 0;
int val3 = 0;


int correctCount = 0;
boolean correctCode = false;
int uwu = 0;
int i = 0;

void myHandler(const char *event, const char *data);




void setup(){
     pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  delay(4000);
     
  Serial.begin(9600);
   delay(4000);
   Particle.subscribe("RESPONSE", myHandler, MY_DEVICES);
   pinMode(A5, INPUT);
   pinMode(A4, INPUT);
   pinMode(A3, INPUT);
   
   pinMode(A2, OUTPUT);
   pinMode(D8, OUTPUT);
   
   
   
}
  
void loop(){

    checkCode();

    if (correctCode) {

        // add instructions to do something if secret code entered correctly
		
  pinMode(led2, OUTPUT);
		  digitalWrite(led2, HIGH);
     delay(500);
     
    }
    val1 = digitalRead(A5);
   
    
    

    if (val1 == HIGH) {
        digitalWrite(A2, HIGH);
        delay(4000);
        
        val1 = 0 ;
        val2 = digitalRead(A4);
        if (val2 == HIGH) {
            digitalWrite(led2, HIGH);
            
            delay(4000);
            val2 = 0 ;
            
            val3 = digitalRead(A3);
            if (val3 == HIGH) {
                val3 = 0 ;
                digitalWrite(D8, HIGH);
               Particle.publish("CODE", "CORRECT" , PRIVATE);
                delay(4000); 
            }
        }
        }
digitalWrite(A2, LOW);
digitalWrite(led2, LOW);
digitalWrite(D8, LOW);
}
    
void myHandler(const char *event, const char *data)
{
     if (strcmp(data,"TRUE")==0){
        digitalWrite(D7,HIGH);
        delay(4000);
        digitalWrite(D7,LOW);
        }
}


    



void checkCode() {
    char key = keypad.getKey();
    // if key pressed, then check which key
    if (key) { 
        // optional: play sound as feedback when key pressed
        // tone(speakerPin, 3000, 25);

        // if key matches next key in secret code, add one to correct count
        if (key == secretCode[correctCount]) {
            correctCount++; 
        } else {
            // else wrong key was entered (reset correct count)
            correctCount = 0; 
        }
    }
    // check to see if complete secret code entered correctly
    if (correctCount == codeLength) {
        correctCode = true;
    }
    // need slight delay between key readings
    delay(500);
}