Interface 4x4 Keypad With Raspberry Pi

Introduction

If you're developing project that require control panel, keypad can be one of the important component. So, in this tutorial, I will share on how to interface keypad with Raspberry Pi.

Video

This video will show you how to interface 4x4 keypad with Raspberry Pi and create a simple password application.

Hardware Preparation

This is the list of items used in the video

• Raspberry Pi 4 Model B
• Maker pHAT
• 2x16 LCD with I2C Module
• Right Angle Pin Header (Male) 1x40 Ways
• 16GB Micro SD Card
• Keypad 4x4
• 40 Ways Female to Female Jumper Wire

Wiring connection table.

Sample Program

This is sample program to interface keypad with Raspberry Pi. It has 2 files, (1) Main file and (2) Library for I2C LCD.

Thank You

References:

1. Raspberry Pi gpiozero library
2. How to Display on I2C LCD Using Raspberry Pi

Thanks for reading this tutorial. If you have any technical inquiry, please post at Cytron Technical Forum.