Pi Pico W Voice Command Relay
Pi Pico W Voice Command Relay Kit: Build a Voice-Activated Smart Switch System
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Imagine walking into your room and telling your phone to switch on the fan or lamp—without any cloud service or smart hub. This kit places a local WebSocket server on a Raspberry Pi Pico W, letting you speak labels like “light on” or “fan off” and instantly toggle four appliances. The phone captures voice, converts it to text, sends the keyword via WebSocket, and the Pico W fires the matching relay—all on your home Wi-Fi, no internet dependency.
What You'll Build
You’ll assemble a self-contained voice-control board with a 0.96‑inch OLED that displays live relay status and the last recognized command. The Pico W hosts a micro web page on your phone; tap the mic, say a phrase, and the corresponding channel activates. Four 10A relays let you switch lights, fans, pumps, or any AC/DC load under 250V. The entire system fits on the included breadboard, ready to be embedded into a custom enclosure.
What You'll Learn
- Set up a WebSocket server on a Raspberry Pi Pico W using MicroPython and serve a voice‑input web client.
- Parse JSON payloads from the Web Speech API and implement keyword‑matching logic to trigger specific relays.
- Drive a 4‑channel relay module safely with 1N4007 flyback diodes and base resistors for transistor protection.
- Interface an I2C OLED display to show command log, Wi‑Fi status, and relay states in real time.
Kit Contents
| Component | Quantity |
|---|---|
| Raspberry Pi Pico W | x1 |
| 4-ch Relay Module | x1 |
| 0.96in OLED | x1 |
| 1N4007 Diode | x5 |
| 10kΩ Resistors | x5 |
| 400-pt Breadboard | x1 |
| M-M Wires | x20 |
| Micro USB Cable | x1 |
Why Buy This Kit Instead of Sourcing Parts Separately
| Factor | Sourcing Separately | Compoden Kit |
|---|---|---|
| Compatibility checks | You verify every part | Pre-tested as a system |
| Build support | Forums and scattered tutorials | AI companion trained on this exact project |
| Time to first working build | Days of debugging | Hours, with step-by-step guidance |
| Shipping coordination | Multiple sellers, multiple delays | One shipment from Bengaluru in 3-5 days |
Who This Kit Is For
This intermediate kit fits perfectly into CBSE Class 11–12 smart home projects for ATL Tinkering Labs, B.Tech ECE/EEE undergraduates prototyping IoT control in their final year, Smart India Hackathon squads needing a voice‑switching module that works offline, and hobbyists at IIT/NIT/VIT/BITS who want a ready‑to‑code home automation platform without worrying about component mismatches.
Built and Backed by Compoden
Every Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.
What if I get stuck during the build?
Scan the QR code on the box to chat with the AI companion, which has full access to the project’s wiring, code, and troubleshooting steps. You can also send a message on WhatsApp for hands‑on human assistance.
Do I need a separate power supply for the relays?
The kit powers the relay module from the Pico W’s 5V USB pin, with 1N4007 diodes for protection. For loads drawing over 2A, an external 5V adapter is recommended—our guide shows you exactly how to wire it safely.
Which phones can send the voice commands?
Any phone with a modern browser (Chrome, Safari) that supports the Web Speech API. You open a local page served by the Pico W, tap the microphone, and speak—no app installation needed.
Can I control more than four devices?
The included 4‑channel relay handles four appliances. The Pico W has enough GPIOs to drive additional relay modules; the AI companion can help you scale the code for up to eight channels with an external power source.
Pico W receives voice commands from phone via WebSocket and toggles relay channels by keyword match.
What's in this kit
Other projects you can build
Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items