Keypad 4x3

Keypad 4x3 matrix 123 456 789 *0#

Width: 48.7 mm

Pinout — Keypad 4x3

Pin	Signal	Description
`C2`	digital	Column 2
`R1`	digital	Row 1
`C1`	digital	Column 1
`R4`	digital	Row 4
`C3`	digital	Column 3
`R3`	digital	Row 3
`R2`	digital	Row 2

Example wiring diagram — Keypad 4x3

From	To	Wire
`board:D2`	`x1:R1`	green
`board:D3`	`x1:R2`	blue
`board:D4`	`x1:R3`	yellow
`board:D5`	`x1:R4`	purple
`board:D6`	`x1:C1`	cyan
`board:D7`	`x1:C2`	magenta
`board:D8`	`x1:C3`	brown

Example Arduino code — Keypad 4x3

This example was written and compile-checked for the arduino-uno. Codey Online adapts it to any other supported board for you.

#include <Keypad.h>

const byte ROWS = 4;
const byte COLS = 3;

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

byte rowPins[ROWS] = {2, 3, 4, 5};
byte colPins[COLS] = {6, 7, 8};

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

void setup() {
  Serial.begin(9600);
  while (!Serial) {
    ;
  }
  Serial.println("4x3 keypad ready. Press a key:");
}

void loop() {
  char key = keypad.getKey();
  if (key) {
    Serial.print("Key pressed: ");
    Serial.println(key);
  }
}

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