Knowledge Base.

Guide to the Bluetooth Hat

You are here:

The Bluetooth Hat is our improvement on the classic Bluetooth Cubelet! Cap your robot constructions with the Bluetooth Hat to quickly and easily pair with any Bluetooth-enabled wireless device using Bluetooth Low Energy (BLE).

Use the Bluetooth Hat with the Cubelets mobile App to Remote Control your robot creations or change a robot block’s programming with the push of a button using Personality Swap. Want more programming power? Write your own Cubelets code and track and record data using the Bluetooth Hat and the Cubelets Console web app.

In this guide, we’ll go over:

1. Pairing the Bluetooth Hat to your Device
2. Bluetooth Hat LED Color Meanings
3. Bluetooth Hat and Cubelets App Compatibility

Check out our Bluetooth Troubleshooting Tips for Home and In the Classroom if you’re having any trouble pairing! You can also contact us at

1. Pairing the Bluetooth Hat to your Device

Pairing the Bluetooth Hat to your device is super simple with Bluetooth Low Energy (BLE). There’s no need to open up your device’s Bluetooth Setting to pair, just make sure your device’s Bluetooth is enabled and open up the Cubelets App. Attach the Bluetooth Hat to your powered Cubelets construction and hold the construction near your device for easy location-based pairing.

Episode 2 – Create with Cubelets

You can place your Bluetooth Hat anywhere on your Cubelets construction, but some users prefer to snap the Hat onto the Battery Cubelet to avoid disconnection while adding or swapping out blocks in their robot construction. If the Bluetooth Hat gets disconnected during robot building, reattach the Hat to the powered construction and pairing will happen automatically.

Please note, in all versions of Android OS since Android Marshmallow (6.0),  Location Services permissions are required to successfully scan for nearby Bluetooth LE devices. Modular Robotics will never view, collect, or use your device location even if you agree to these permissions.

2. Bluetooth Hat LED Color Meanings 

You’ll notice a bright multi-colored LED on the Bluetooth Hat which lets you know whether the Hat has paired successfully and helps in troubleshooting.

Blinking Green = The Bluetooth Hat is searching for a device to pair with but is not yet connected.

Blinking Blue = The Bluetooth Hat has successfully paired to a device.

Upon startup, the Bluetooth Hat will blink a 3-color sequence. This sequence is used when pairing to Cubelets Console or the Cubelets app and to help tell Bluetooth Hats apart where multiple Hats are in use. There’s no need to pair the Bluetooth Hat in the Bluetooth Settings of your device when using the Cubelets App, but once your Hat is successfully paired it will pop up in your Bluetooth Settings as “Cubelet-XXX” with a unique 3 letter color sequence.

R – Red, Y – Yellow, G – Green, B – Blue, C – Cyan, M – Magenta, W -White

The following Bluetooth Hat would show under your possible Bluetooth devices as “Cubelet-MRY” (it blinks magenta, red, and then yellow in order when first powered up.)

3. Using the Bluetooth Hat with the Cubelets App and Cubelets Console

The Bluetooth Hat either pairs with your mobile device to run the Cubelets Apps for the Remote Control and Personality Swap features or it can pair with your computer for our web application, Cubelets Console, for in-depth programming and the Data Logger feature.

The Bluetooth Hat is not able to pair to Cubelets Flash or the Cubelets Updater applications at this time. These legacy applications can only be accessed with the classic Bluetooth Cubelet.

Please contact our team at with any questions!

Previous Guide to the Battery Cubelet
Next Modular Robotics Privacy Policy and Location Services
Table of Contents


Frequently asked questions.

Cubelets FAQs is your place to find answers to common questions about Cubelets robot blocks, orders, and Modular Robotics.

Contact us.

Need help, can't find an answer? Contact the Modular Robotics support team and we'll help you!

Shipping and tax policies.

Get the details on Modular Robotics shipping policies and sales tax collection for orders in the United States and around the world.

Warranty and returns.

Cubelets are backed by a one year warranty. Need to make a claim, get a replacement, or have questions? Click to get started.

Cubelets Resources.

Everything you need to teach with Cubelets robot blocks.

Explore a huge collection of K-12 lessons, activities, guides, training, and more.

New to Cubelets?

Learn everything you need to know to start creating more with Cubelets robot blocks in this handy Getting Started Guide.

Go further with Cubelets apps.

Go beyond the building blocks and play with the code inside. Cubelets apps make it easy to create even more with your Cubelets.

Looking for some inspiration?

There are millions of robots you can create with Cubelets. Check out these robots to help inspire your inventions.

Shop Cubelets.


Cubelets robot blocks are used by educators all around the world to help students explore computational thinking, coding, and STEM. 

Jump to...

At Home.

Bring home the educational teaching tool loved by teachers everywhere. Explore sets designed for learning through play.

Jump to...