How to use push-button as on-off switch?

How to use push-button as on-off switch in Arduino?

Answer

The below Arduino code uses a push-button as an on-off switch

Arduino Code

#include <ezButton.h> #define SWITCH_OFF 0 #define SWITCH_ON 1 ezButton button(7); // create ezButton object that attach to pin 7; int switch_state = SWITCH_OFF; // initial state void setup() { Serial.begin(9600); button.setDebounceTime(50); // set debounce time to 50 milliseconds } void loop() { button.loop(); // MUST call the loop() function first if (button.isPressed()) { // change state of switch if (switch_state == SWITCH_OFF) switch_state = SWITCH_ON; else switch_state = SWITCH_OFF; Serial.print("switch's state -> "); Serial.println(switch_state); } //Serial.print("switch's state: "); //Serial.println(switch_state); }

Wiring Diagram for the above code

Arduino Button Wiring Diagram

Image is developed using Fritzing. Click to enlarge image

Quick Steps

※ NOTE THAT:

The above code debounces for the button. See why do we need to debounce for button

You can also refer to the following tutorials:

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