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How to use button to start program
How to start Arduino program by pressing a button.? I want to run Arduino code when I press a button.
Answer
See and compare two below codes:
- The code without start button
void setup() {
/*******************
* your setup code
*******************/
}
void loop() {
/******************
* your loop code
******************/
}
- The code with start button
#include <ezButton.h>
ezButton button(7); // create ezButton object that attach to pin 7;
void setup() {
button.setDebounceTime(50); // set debounce time to 50 milliseconds
while (!button.isPressed())
button.loop(); // MUST call the loop() function first
/*******************
* your setup code
*******************/
}
void loop() {
/******************
* your loop code
******************/
}
The wiring diagram for above code:
This image is created using Fritzing. Click to enlarge image
If you want to use a button to start/stop program each time button is pressed, see how to use button to start/stop program
※ NOTE THAT:
The above code uses the ezButton library, you can see how to install the library
Hardware for above code
| 1 × Arduino UNO Buy on Amazon | |
| 1 × USB 2.0 cable type A/B Buy on Amazon | |
| 1 × Button Buy on Amazon | |
| 1 × Breadboard Buy on Amazon | |
| 1 × Jumper Wires Buy on Amazon |
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