In Arduino app system, keyboard is one of the indispensable component to
man-machine dialogue. When the button is less, we can connect the button to the I/O port of Arduino. While there need more button and the I/O resource of Arduino is limit, it is better to choose the matrix keboard. Next I will demo that use the 4 * 4 keyboard on Arduino.
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Step 1: Step 1: Part List
- 1 x Arduino UNO
- 1 x 4*4 keyboard
- 8 x Wire
Step 2: Step 2: Wiring Diagram
Step 3: Step 3: Test Code
Test code in here :
Step 4: Step 4: Run Test
(1) Connect the wiring according to the wiring diagram
(2) Download the Arduino library in attachment and save it to the Arduino IDE libraries:
(3) Open the ArduinoIDE and put the test code into the IDE, compile and download:
（4）Open the serial Monitor, set the baud rate to 9600, press any key and you will see the corresponding key value in the monitor；
Step 5: Step 5： Download Code