Bluetooth

This page describes the procedure to download MakeCode program to the EV3 brick over Bluetooth.

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WARNING: EXPERIMENTAL FEATURES AHEAD!

Support for Bluetooth download relies on Web Serial, an experimental browser feature. Web Serial is a work in progress; it may change or be removed in future versions without notice.

By enabling these experimental browser features, you could lose browser data or compromise your device security or privacy.

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Supported browsers

Chrome desktop, version 77 and higher, Windows 10
Edge Insider desktop, version 77 and higher, Windows 10

To make sure your browser is up to date, go to the '...' menu, click "Help" then "About".

Next you need to enable the experimental features (this may change in the future)

go to chrome://flags/#enable-experimental-web-platform-features and enable Experimental Web Platform features

Machine Setup

pair your EV3 brick with your computer over Bluetooth. This is the usual pairing procedure.

Download over Bluetooth

go to the beta editor https://makecode.mindstorms.com/beta

This feature is not yet released so make sure to use the beta editor.

click on Download to start a file download as usual
on the download dialog, you should see a Bluetooth button. Click on the Bluetooth button to enable the mode.
make sure the EV3 brick is not running a program
click on Download again to download over bluetooth.

Choosing the correct serial port

Unfortunately, the browser dialog does not make it easy to select which serial port is the brick. On Windows, it typically reads "Standard Serial over Bluetooth" and you may have multiple of those if you've paired different bricks.

Known issues

We do not detect properly that the program is running on the brick. Make sure to stop the program before starting the download procedure.
The list of programs on the brick screen is not updated when uploading via bluetooth.

Feedback

Please send us your feedback through https://forum.makecode.com.

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