#include <Keypad.h>
const uint8_t ROWS = 4;
const uint8_t COLS = 4;
char keys[ROWS][COLS] = {
{ '1', '2', '3' },
{ '4', '5', '6' },
{ '7', '8', '9' },
{ '*', '0', '#' }
};
int A = 440;
int B = 494;
int C = 523;
int D = 587;
int E = 659;
uint8_t colPins[COLS] = { 5, 4, 3}; // Pins connected to C1, C2, C3
uint8_t rowPins[ROWS] = { 9, 8, 7, 6 }; // Pins connected to R1, R2, R3, R4
Keypad keypad = Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS);
void setup() {
Serial.begin(9600);
}
void loop() {
char key = keypad.getKey();
if (key == '1') {
tone(13, 440, 250);
delay(250);
tone(13, 494, 250);
delay(250);
tone(13, 523, 250);
delay(250);
tone(13, 784, 250);
delay(250);
}
if (key == '2') {
tone(13, A, 250);
delay(250);
tone(13, B, 250);
delay(250);
tone(13, C, 250);
delay(250);
tone(13, D, 250);
delay(250);
tone(13, E, 250);
delay(500);
tone(13, A, 250);
delay(250);
tone(13, B, 250);
delay(250);
tone(13, C, 250);
delay(250);
tone(13, D, 250);
delay(250);
tone(13, E, 250);
delay(500);
tone(13, D, 250);
delay(250);
tone(13, C, 250);
delay(250);
tone(13, D, 250);
delay(250);
tone(13, E, 250);
delay(350);
tone(13, D, 250);
delay(250);
tone(13, C, 250);
delay(250);
tone(13, D, 250);
delay(250);
tone(13, E, 250);
delay(250);
tone(13, D, 250);
delay(250);
tone(13, C, 250);
delay(250);
tone(13, A, 250);
delay(500);
}
}