Using a Buzzer with Smart Pi One

This page describes how to connect and use a buzzer with the Smart Pi One, including wiring instructions, and code examples in both Python and C.

Required Materials

• Smart Pi One
• Active or passive buzzer
• Connecting wires
• Breadboard (optional for easier connections)

Wiring Diagram

Below is a sample wiring diagram for connecting a buzzer to the Smart Pi One:

Component	Smart Pi One Pin	Description
Buzzer (+)	GPIO7	Connect to the positive terminal of the buzzer
Buzzer (-)	GND	Connect to the ground (GND) pin

Connecting the Buzzer: - Connect the positive terminal of the buzzer to a GPIO pin on the Smart Pi One (e.g., GPIO7). - Connect the negative terminal of the buzzer to the ground (GND) pin on the Smart Pi One.

Prerequisites: Configuration of smartpi-gpio

To install SmartPi-GPIO on your Smart Pi One, follow these steps:

1. Update system:

sudo apt update 
sudo apt-get install -y python3-dev python3-pip libjpeg-dev zlib1g-dev libtiff-dev
sudo mv /usr/lib/python3.11/EXTERNALLY-MANAGED /usr/lib/python3.11/EXTERNALLY-MANAGED.old

1. Clone the repository:

git clone https://github.com/ADNroboticsfr/smartpi-gpio.git
cd smartpi-gpio

1. Install the library:

sudo python3 setup.py sdist bdist_wheel
sudo pip3 install dist/smartpi_gpio-1.0.0-py3-none-any.whl

1. Activate GPIO interfaces:

sudo activate_interfaces.sh

Using Python

Creating the Python Script

1. Open a terminal on your Smart Pi One.
2. Create a new Python file using nano:

nano buzzer_control.py

1. Copy and paste the following Python code into the file:

import time
from smartpi_gpio.gpio import GPIO

# Initialize GPIO
gpio = GPIO()
BUZZER_PIN = 7

# Set GPIO7 as output for the buzzer
gpio.setup(BUZZER_PIN, gpio.OUT)

try:
    while True:
        # Turn the buzzer on
        gpio.output(BUZZER_PIN, gpio.HIGH)
        print("Buzzer ON")
        time.sleep(1)  # Buzzer stays on for 1 second

        # Turn the buzzer off
        gpio.output(BUZZER_PIN, gpio.LOW)
        print("Buzzer OFF")
        time.sleep(1)  # Buzzer stays off for 1 second
except KeyboardInterrupt:
    pass
finally:
    gpio.cleanup()  # Clean up GPIO

1. Save the file by pressing CTRL + X, then Y, and finally Enter.

Running the Python Script

To run the Python script, use the following command:

sudo python3 buzzer_control.py