User manual

www.sainsmart.com

const byte ROWS = 4;

const byte COLS = 4;

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

byte rowPins[ROWS] = {13, 12, 11, 10};

byte colPins[COLS] = {9, 8, 7, 6};

Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );

Password password = Password("0000");

void setup(){

Serial.begin(9600);

pinMode(relay1, OUTPUT);

digitalWrite(relay1, 255);

pinMode(relay2, OUTPUT);

digitalWrite(relay2, 255);

pinMode(relay3, OUTPUT);

digitalWrite(relay3, 255);

pinMode(relay4, OUTPUT);

digitalWrite(relay4, 255);

pinMode(lockedled, OUTPUT);

digitalWrite(lockedled, 255);

pinMode(unlockedled, OUTPUT);

digitalWrite(unlockedled, 0);

}

void loop(){

char key = keypad.getKey();

if(locked){

if(passinput){

unsigned long ledcurrentvar = millis();

if(ledcurrentvar - ledflashvar > ledflashtime) {

ledflashvar = ledcurrentvar;

digitalWrite(lockedled, !digitalRead(lockedled));

}

else{

digitalWrite(lockedled, 255);

}

digitalWrite(unlockedled, 0);

}

if (key != NO_KEY){

Serial.println(key);

password.append(key);