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Arduino - Button - Pump
We are going to learn how to use Arduino to turn on a pump several seconds and then turn off when a button is pressed.
Hardware Required
Or you can buy the following sensor kits:
| 1 | × | DIYables Sensor Kit (30 sensors/displays) | |
| 1 | × | DIYables Sensor Kit (18 sensors/displays) |
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Wiring Diagram
This image is created using Fritzing. Click to enlarge image
Arduino Code
/*
* Created by ArduinoGetStarted.com
*
* This example code is in the public domain
*
* Tutorial page: https://arduinogetstarted.com/tutorials/arduino-button-pump
*/
#include <ezButton.h> // include ezButton library
#include <ezOutput.h> // include ezOutput library
ezOutput pump(A5); // create ezOutput object attached to pin A5
ezButton button(12); // create ezButton object attached to pin 12
void setup() {
Serial.begin(9600);
button.setDebounceTime(50); // set debounce time to 50 milliseconds
pump.low(); // turn pump off
}
void loop() {
pump.loop(); // MUST call the loop() function first
button.loop(); // MUST call the loop() function first
if (button.isPressed()) {
Serial.println("Pump is started");
pump.low();
pump.pulse(10000); // turn on for 10000 milliseconds ~ 10 seconds
// after 10 seconds, pump will be turned off by pump.loop() function
}
}
※ NOTE THAT:
The above code does:
- Debounced for the button (supported by ezButton library). See Why do we need debouncing?
- If the button is pressed, turned pump on 10 seconds and then turn it off (supported by ezOutput library)
- All code is non-blocking code (supported by ezButton and ezOutput libraries)
Quick Steps
- Connect Arduino to PC via USB cable
- Open Arduino IDE, select the right board and port
- Navigate to the Libraries icon on the left bar of the Arduino IDE.
- Search “ezButton”, then find the button library by ArduinoGetStarted
- Click Install button to install ezButton library.
- Search “ezOutput”, then find the output library by ArduinoGetStarted
- Click Install button to install ezOutput library.
- Copy the above code and open with Arduino IDE
- Click Upload button on Arduino IDE to upload code to Arduino
- Press the button
- See the pump's state
Code Explanation
Read the line-by-line explanation in comment lines of source code!
Video Tutorial
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