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I am going to show you how to use a 3X4 keypad with the LinkIt ONE micro controller. Let's Begin!

Step 1: Materials

  1. LinkIt ONE Microcontroller
  2. Breadboard
  3. Breadboard Wires
  4. 3x4 keypad Module
  5. row of pins (9)

Step 2: Soldering Pins

The keypad I linked does not come with pin out pins on the bottom of it so you have to solder your own on. Simply break off a row of 9 pins and solder the row into the holes on the keypad as shown above.

Step 3: Library and Code!

Library used for the keypad: Link

Just install the library as you would any other Arduino library

The code I used is available to be downloaded on this page.

Step 4: Wiring

Use the list below and the picture above to help you with this step

Note: Pin1 and 9 on keypad are not connected to anything we only soldered the pins into those spots for support!

Keypad pin (1-9) --> LinkIt ONE Pin

2 --> D7

3 --> D9

4 --> D10

5 --> D5

6 --> D11

7 --> D12

8 --> D3

Step 5: Apply It!

Simply upload you code and power up your device. Then open the serial monitor in the Arduino IDE and make sure it is set to the 5600 baud rate. Press buttons and see the correct number appear on the serial monitor!

Now integrate this into a larger build!

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