ezButton Library - Multiple Button All Example

Hardware Required

1×Arduino UNO or Genuino UNO
1×USB 2.0 cable type A/B
1×Jumper Wires
1×(Optional) 9V Power Adapter for Arduino
1×(Recommended) Screw Terminal Block Shield for Arduino Uno
1×(Optional) Transparent Acrylic Enclosure For Arduino Uno
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About Button

About Button Library

Wiring Diagram

Arduino Button Library Wiring Diagram

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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 05.MultipleButtonAll example
/* * Created by ArduinoGetStarted.com * * This example code is in the public domain * * Tutorial page: https://arduinogetstarted.com/tutorials/arduino-button-library * * This example: * + uses debounce for multiple buttons. * + reads state of multiple buttons * + detects the pressed and released events of multiple buttons */ #include <ezButton.h> ezButton button1(6); // create ezButton object that attach to pin 6; ezButton button2(7); // create ezButton object that attach to pin 7; ezButton button3(8); // create ezButton object that attach to pin 8; void setup() { Serial.begin(9600); button1.setDebounceTime(50); // set debounce time to 50 milliseconds button2.setDebounceTime(50); // set debounce time to 50 milliseconds button3.setDebounceTime(50); // set debounce time to 50 milliseconds } void loop() { button1.loop(); // MUST call the loop() function first button2.loop(); // MUST call the loop() function first button3.loop(); // MUST call the loop() function first int btn1State = button1.getState(); int btn2State = button2.getState(); int btn3State = button3.getState(); Serial.print("button 1 state: "); Serial.println(btn1State); Serial.print("button 2 state: "); Serial.println(btn2State); Serial.print("button 3 state: "); Serial.println(btn3State); if(button1.isPressed()) Serial.println("The button 1 is pressed"); if(button1.isReleased()) Serial.println("The button 1 is released"); if(button2.isPressed()) Serial.println("The button 2 is pressed"); if(button2.isReleased()) Serial.println("The button 2 is released"); if(button3.isPressed()) Serial.println("The button 3 is pressed"); if(button3.isReleased()) Serial.println("The button 3 is released"); }
  • Click Upload button on Arduino IDE to upload code to Arduino
Arduino IDE Upload Code
  • Open Serial Monitor to see result:
Autoscroll Show timestamp
Clear output
9600 baud  

Code Explanation

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

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