Interface 4x4 Keypad With raspberry Pi 4. keypad with raspberry pi 4 keypad rpi4, keypad with rpi4, rpi4 keypad Welcome to the next tutorial of our raspberry pi four programming course. Previously, we discovered how to establish a wireless connection between a Pi 4 and an ESP32. However, this post will show you how simple it is to attach a keypad to a Pi 4 and put it to use in several situations. Many individ ...