from the Adafruit Learning System
This is a fun project that walks through how to reverse engineer a smart light bulb that uses Bluetooth Low Energy (BLE) to change its color. I stumbled on the Smart Bulb Colorific! bulb recently at a local store and was intrigued by its Bluetooth-based control and relatively low price (for a ‘smart’ gadget at least). Because the light bulb uses Bluetooth Low Energy (which is a subset of Bluetooth 4.0) it means any BLE device can in theory control the bulb. But to control the bulb the protocol for communicating with it must be understood, and this guide will show you how to use the Bluefruit LE sniffer and other tools to reverse engineer a Bluetooth Low Energy gadget.
If you’d like to follow along and control a bulb yourself you’ll first need a few things:
- A Smart Bulb Colorific! light bulb. It’s possible other BLE light bulbs can be controlled in a similar manner as discovered here, but I recommend picking up one of these bulbs to be sure you can control it. The bulbs use the Colorific! app on the Android or iOS app store for control. You can see a picture of the bulb I used to the left.
- Bluetooth 4.0 USB module. Make sure the module supports Bluetooth Low Energy. Older Bluetooth before version 4.0 does not support BLE!
- Raspberry Pi of any model (A, B, A+, B+, Pi 2, etc.). This guide shows how to use tools and code on the Pi to control the bulb. Another linux computer can be used but we’ve only tested it on the Pi
- Bluefruit LE Sniffer. The Bluefruit LE sniffer is a special version of the Bluefruit LE friend but with a firmware that allows it to watch BLE packets being sent to and from a device.
Each Friday is PiDay here at Adafruit! Be sure to check out our posts, tutorials and new Raspberry Pi related products. Adafruit has the largest and best selection of Raspberry Pi accessories and all the code & tutorials to get you up and running in no time!
Have an amazing project to share? Join the SHOW-AND-TELL every Wednesday night at 7:30pm ET on Google+ Hangouts.
Join us every Wednesday night at 8pm ET for Ask an Engineer!
Learn resistor values with Mho’s Resistance or get the best electronics calculator for engineers “Circuit Playground” – Adafruit’s Apps!
Maker Business — The Prepared Podcast – Jonathan Cedar, BioLite
Wearables — Start with a sketch
Electronics — My signal isn’t THAT noisy, is it?
Biohacking — Fine Tuning Fluorescent Dyes
No comments yet.
Sorry, the comment form is closed at this time.