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- #include <Keypad.h>
- #include <LiquidCrystal_I2C.h>
- LiquidCrystal_I2C lcd(0x27, 20, 4);
- const int a = 23;
- const int b = 25;
- const int c = 27;
- const int d = 29;
- const int e = 31;
- const int f = 33;
- const int g = 35;
- const int p = 37;
- const int Rows = 4;
- const int Cols = 4;
- char keys [Rows][Cols] =
- {
- {'1', '2', '3', 'A'},
- {'4', '5', '6', 'B'},
- {'7', '8', '9', 'C'},
- {'*', '0', '#', 'D'}
- };
- byte rowPins [Rows] = {1,2,3,4};
- byte colPins [Cols] = {5,6,7,8};
- Keypad keypad = Keypad (makeKeymap(keys), rowPins, colPins, Rows, Cols);
- void setup()
- {
- lcd.init();
- lcd.backlight();
- lcd.clear();
- lcd.setCursor(0, 0);
- pinMode(p, OUTPUT);
- pinMode(a, OUTPUT);
- pinMode(a, OUTPUT);
- pinMode(b, OUTPUT);
- pinMode(c, OUTPUT);
- pinMode(d, OUTPUT);
- pinMode(e, OUTPUT);
- pinMode(f, OUTPUT);
- pinMode(g, OUTPUT);
- }
- void keyPress()
- {
- char key = keypad.getKey();
- if (key)
- {
- lcd.clear();
- lcd.print("U Pressed: ");
- lcd.print(key);
- }
- if (key == '1')
- {
- digitalWrite(a, HIGH);
- }
- else if (key == '2')
- {
- digitalWrite(b, HIGH);
- }
- else if (key == '3')
- {
- digitalWrite(c, HIGH);
- }
- else if (key == '4')
- {
- digitalWrite(d, HIGH);
- }
- else if (key == '5')
- {
- digitalWrite(e, HIGH);
- }
- else if (key == '6')
- {
- digitalWrite(f, HIGH);
- }
- else if (key == '7')
- {
- digitalWrite(g, HIGH);
- }
- else if (key == '8')
- {
- digitalWrite(p, HIGH);
- }
- }
- void loop()
- {
- keyPress();
- }
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