Arduino LCD Button Counter

This project demonstrates an Arduino-based LCD button counter using the Arduino UNO R4 WiFi and an I²C LCD display. The sketch counts button presses, debounces the input, toggles an LED, and displays the count on a 16x2 LCD.

Features

• Counts button presses and shows the count on a 16x2 LCD.
• Implements reliable button debouncing.
• Toggles an LED state each time the button is pressed.
• Includes robust, native unit tests to verify debounce and counting logic.
• Built using PlatformIO for professional embedded software development.

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Hardware Requirements

• Arduino UNO R4 WiFi
• 16x2 LCD Display with I²C backpack
• Pushbutton and LED
• Breadboard and connecting wires

How to Build and Upload

Install PlatformIO

pip install platformio

Upload Firmware to Arduino

platformio run -e uno_r4_wifi --target upload

Run Unit tests

platformio test -e native

Dependencies

• LiquidCrystal_I2C by Marco Schwartz