Escape Room Prop Lockbox

keypad.ino

#include <Keypad.h>
#include <Servo.h>  // Include the Servo library
int servoPin = 3;  // Declare the Servo pin
Servo Servo1;  // Create a servo object
const byte n_rows = 4;
const byte n_cols = 4;
char keys[n_rows][n_cols] = {
  {'1','2','3','A'},
  {'4','5','6','B'},
  {'7','8','9','C'},
  {'*','0','#','D'}
};

int led = D8;
//String answer = "987654321";
String answer = "7854487087";
byte colPins[n_rows] = {D3, D2, D1, D0};
byte rowPins[n_cols] = {D7, D6, D5, D4};
char KeyArray[11];
String KeyArrayString;

Keypad myKeypad = Keypad( makeKeymap(keys), rowPins, colPins, n_rows, n_cols); 
 
void setup(){
  Serial.begin(115200);
  pinMode(led,OUTPUT);
  digitalWrite(led,HIGH);
  Servo1.attach(servoPin); // We need to attach the servo to the used pin number
  Servo1.write(120); // Make servo go to 0 degrees
}

int i=0;

void loop(){
  char myKey = myKeypad.getKey();
  if (KeyArrayString==answer){
    Servo1.write(0);
    digitalWrite(led,LOW);
    exit;
  }
  else if (myKey != NULL && KeyArray[11] == NULL && String(myKey) != "C"){
    KeyArray[i]=myKey;
    KeyArrayString=String(KeyArray);
    Serial.print("Key: ");
    Serial.println(KeyArrayString);
    i++;
  }
  else if (KeyArray[11] != NULL || String(myKey) == "C" ){
    i=0;
    digitalWrite(led,LOW);
    delay(500);
    digitalWrite(led,HIGH);
    delay(500);
    digitalWrite(led,LOW);
    delay(500);
    digitalWrite(led,HIGH);
    delay(500);
    digitalWrite(led,LOW);
    delay(500);
    digitalWrite(led,HIGH);
    for (int x=0; x<=11; x++){
      KeyArray[x]=NULL;
    }
    }
  }