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ezButton Library - Single Button Example
Hardware Required
| 1 | × | Arduino UNO or Genuino UNO | |
| 1 | × | USB 2.0 cable type A/B | |
| 1 | × | Button | |
| 1 | × | Breadboard | |
| 2 | × | Jumper Wires |
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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
- Open Serial Monitor to see result:
- Press and release the button
COM6
1
1
1
0
0
0
0
1
1
Autoscroll
Clear output
9600 baud
Newline
※ NOTE THAT:
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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