Those inexpensive battery-powered Christmas light chains you get everywhere?
They’re not smart. They’re not even close.
So I built a fully smart-home-enabled, battery-powered, wireless, and Home-Assistant-controlled light chain — completely from scratch.
This project takes a pair of ESP32 microcontrollers, a low-power wireless trick called ESP-NOW, a MOSFET for switching, and a custom 3D-printed enclosure shaped like a gingerbread house… and turns a dumb $5 light chain into a full Smart Home light you can control from your phone.
🛠️ In this video I will:
- Show how I prototyped the system using two ESP32s, a MOSFET, and a breadboard
- Explain how I solved the big problem with battery-powered Wi-Fi devices: power drain
- Use ESP-NOW to send ultra-lightweight wireless signals between two microcontrollers
- Build an enclosure that hides the electronics — complete with a 3D-printed gingerbread house cover
- Assemble and test the final system, showing instant on/off control from Home Assistant
- Walk through how everything stays low-power while still reacting immediately to commands
This build is a mix of smart home engineering, IoT design, clever power management, and a fun Christmas twist.
Now the lights automatically turn off at night, turn back on in the morning, and can be placed anywhere without needing an outlet.
📁 Want to support future projects or access downloadable files?
Join my Patreon here:
https://www.patreon.com/BreakaLayer🎥 Check out my other builds:
The LIDAR Filament Tool — instantly checks if you have enough filament:
https://youtu.be/0fKXn4Qcc44Mini Commodore 64 series:
Episode 1 – Designing the Mini C64 Case:
https://youtu.be/UCXuedIun7YEpisode 2 – Internal Layout & Raspberry Pi Mounts:
https://youtu.be/HNFZ57SslM4Episode 3 – I Tried To Make a 3D-Printed Keyboard For My Mini C64:
https://youtu.be/OmuACNhtwd0⏱️ Timestamps:
00:00 – Intro: Turning “dumb” lights smart
00:31 – A custom light controller
00:48 – How it all works
01:37 – Prototype & first tests
03:41 – The enclosure
04:05 – Building the gingerbread house cover
04:41 – Mounting and assembly
05:13 – Build completed
05:34 – Wrap-up
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#esp32 #smarthome #homeassistant #christmaslights #electronics #3dprinting #makerprojects #iot