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Lesson 01: Button Module

In this lesson, you will learn the basics of using a button with Raspberry Pi. We will show you how to connect a button to GPIO pin 17 and write a simple Python script to monitor its state. You’ll learn how to program the Raspberry Pi to detect when the button is pressed and released, and respond with appropriate messages. This introductory project is an excellent way to get familiar with GPIO interaction and basic Python scripting, making it well-suited for beginners starting their journey in Raspberry Pi and hardware programming.

Required Components

In this project, we need the following components.

It’s definitely convenient to buy a whole kit, here’s the link:

Name	ITEMS IN THIS KIT	LINK
Universal Maker Sensor Kit	94	Universal Maker Sensor Kit

You can also buy them separately from the links below.

Component Introduction	Purchase Link
Raspberry Pi 5	BUY
Button Module	-
Breadboard	BUY

Wiring

Code

from gpiozero import Button

# Initialize button connected to GPIO pin 17
button = Button(17)

# Continuously check the button state
while True:
   if button.is_pressed:
      print("Button is pressed")  # Print when button is pressed
   else:
      print("Button is not pressed")  # Print when button is not pressed

Code Analysis

Import Library

Import the Button class from the gpiozero library for button control.
```
from gpiozero import Button
```
Initialize the Button

Create a Button object connected to GPIO pin 17.
```
button = Button(17)
```
Monitor Button State Continuously

Use a while True loop to continuously check the state of the button. If the button is pressed (button.is_pressed), it prints “Button is pressed”. Otherwise, it prints “Button is not pressed”.
```
while True:
    if button.is_pressed:
        print("Button is pressed")
    else:
        print("Button is not pressed")
```