Note

Hello, welcome to the SunFounder Raspberry Pi & Arduino & ESP32 Enthusiasts Community on Facebook! Dive deeper into Raspberry Pi, Arduino, and ESP32 with fellow enthusiasts.

Why Join?

  • Expert Support: Solve post-sale issues and technical challenges with help from our community and team.

  • Learn & Share: Exchange tips and tutorials to enhance your skills.

  • Exclusive Previews: Get early access to new product announcements and sneak peeks.

  • Special Discounts: Enjoy exclusive discounts on our newest products.

  • Festive Promotions and Giveaways: Take part in giveaways and holiday promotions.

👉 Ready to explore and create with us? Click [here] and join today!

Lesson 24: Vibration Sensor Module (SW-420)

In this lesson, you will learn to connect and use a SW-420 Vibration Sensor Module with a Raspberry Pi Pico W. The course guides you through setting up the vibration sensor on GPIO 16 and writing a MicroPython script to monitor vibrations. You will write a loop to continually check the sensor’s output, displaying a message when vibrations are detected. This practical exercise introduces you to working with external sensors on the Raspberry Pi Pico W, enhancing your understanding of hardware interfacing and programming in MicroPython.

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 Pico W

BUY

Vibration Sensor Module (SW-420)

BUY

Breadboard

BUY

Wiring

../_images/Lesson_24_vibration_module_bb.png

Code

from machine import Pin
import time

# Initialize GPIO 16 as an input pin for the vibration sensor
vibration_sensor = Pin(16, Pin.IN)

# Continuously check the vibration sensor's state
while True:
    # If the sensor detects vibration (value is 1), print a message
    if vibration_sensor.value() == 1:
        print("Vibration detected!")
    # If no vibration is detected, print ellipses
    else:
        print("...")

    # Pause for 0.1 seconds to lower the demand on the CPU
    time.sleep(0.1)

Code Analysis

  1. Importing Required Libraries

    from machine import Pin
import time

    This imports the machine module for hardware related operations and time module for handling time-related tasks.

  2. Initializing the Vibration Sensor

    # Initialize GPIO 16 as an input pin for the vibration sensor
vibration_sensor = Pin(16, Pin.IN)

    Here, GPIO 16 is set up as an input pin. The Pin class from the machine module is used to interact with the GPIO pins. Pin.IN configures it as an input.

  3. Continuous Sensor Monitoring

    # Continuously check the vibration sensor's state
while True:

    A while True loop is used to create an endless loop for continuously checking the sensor’s state.

  4. Checking Sensor State and Responding

    # If the sensor detects vibration (value is 1), print a message
if vibration_sensor.value() == 1:
    print("Vibration detected!")
# If no vibration is detected, print ellipses
else:
    print("...")

    Within the loop, vibration_sensor.value() checks the current state of the sensor. If it returns 1, it indicates vibration is detected, and a message is printed. Otherwise, ellipses are printed.

  5. Managing CPU Usage

    # Pause for 0.1 seconds to lower the demand on the CPU
time.sleep(0.1)

    time.sleep(0.1) pauses the loop for 0.1 seconds. This is important to prevent the script from consuming too much CPU time.