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- #include <Keypad.h>
- const byte ROWS = 3; // Four rows
- const byte COLS = 3; // Three columns
- // Define the Keymap
- char keys[ROWS][COLS] = {
- {'1','2','3'},
- {'4','5','6'},
- {'7','8','9'}
- };
- // Connect keypad ROW0, ROW1, ROW2 and ROW3 to these Arduino pins.
- byte rowPins[ROWS] = { 12, 11, 10, };
- // Connect keypad COL0, COL1 and COL2 to these Arduino pins.
- byte colPins[COLS] = { 8, 7, 6};
- // Create the Keypad
- Keypad kpd = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );
- #define ledpin 13
- void setup()
- {
- pinMode(ledpin,OUTPUT);
- digitalWrite(ledpin, HIGH);
- Serial.begin(9600);
- }
- void loop()
- {
- char key = kpd.getKey();
- if(key) // Check for a valid key.
- {
- switch (key)
- {
- case '*':
- digitalWrite(ledpin, LOW);
- break;
- case '#':
- digitalWrite(ledpin, HIGH);
- break;
- default:
- Serial.println(key);
- }
- }
- }
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