ezButton Library - Single Button Example

Hardware Required

1×Arduino UNO or Genuino UNO
1×USB 2.0 cable type A/B
2×Jumper Wires
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About Button

About Button Library

Wiring Diagram

Arduino Button Library Wiring Diagram

Image is developed using Fritzing. Click to enlarge image

Arduino Code

Quick Steps

  • Install ezButton library. See How To
  • Connect Arduino to PC via USB cable
  • Open Arduino IDE, select the right board and port
  • On Arduino IDE, Go to File Examples ezButton 01.SingleButton example
/* * Created by ArduinoGetStarted.com * * This example code is in the public domain * * Tutorial page: https://arduinogetstarted.com/tutorials/arduino-button-library * * This example reads the state of a button without debounce and print it to Serial Monitor. */ #include <ezButton.h> ezButton button(7); // create ezButton object that attach to pin 7; void setup() { Serial.begin(9600); } void loop() { button.loop(); // MUST call the loop() function first int btnState = button.getState(); Serial.println(btnState); }
  • Click Upload button on Arduino IDE to upload code to Arduino
  • Arduino IDE Upload Code
  • Open Serial Monitor to see result:
  • Press and release the button
  • COM6
    1 1 1 0 0 0 0 1 1
    Autoscroll Show timestamp
    Clear output
    9600 baud  


Since the ezButton library used the internal pull-up resistor, the state will be HIGH (1) when no press, and LOW (0) when pressed.

Code Explanation

Read the line-by-line explanation in comment lines of source code!

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