What you'll be building

This tutorial teaches you how to turn an active buzzer that emits a high-frequency sound on and off via the internet.


  • Raspberry Pi connected to the internet
  • Circuit materials: active buzzer, breadboard, wires

Step 1: Set up the circuit

Connect the active buzzer to GPIO pin 4.

Step 2: Run LimitOS on the Raspberry Pi

LimitOS runs on top of Raspberry Pi OS (Buster), and can be run via:
curl -sS https://limitos.com/run | bash

Follow the on-screen instructions to register the device afterwards.

Step 3: Set up the device on the LimitOS website

Add pin 4 as a digital output, and you can then click the "on" or "off" buttons on the website to turn the buzzer on or off.