You can tell if Scratch and S2Bot are connected via the green 'connected' LED in both applications.

Scratch should now automatically 'connect' to S2Bot and the new blocks will be available in the 'More Blocks' section.sb2 template file you saved earlier on your desktop.

From the File menu select 'Upload from your computer'.

In Chrome browser go to and click Create (or start the offline version of Scratch).

Click on the menu button (top right) and select 'New Scratch template'.

Click 'Close' to close the connection dialog.

When connected (takes 5 seconds or so) you will see tilt/motor data etc on screen.

Click on the hub name to connect it (no pairing is required).

Remember the hub can only connect to one device at a time (so cannot connect to the BLED112 dongle if already connected to an iPad or tablet). If you do not see the hub press the green button so that the LED starts flashing (and you can also try restarting the S2Bot app).

You should see your LEGO hub appear in the list of bluetooth devices.

Select 'LEGO WeDo 2.0' or 'LEGO Boost' or 'LEGO PoweredUp' from the drop down list of devices.

Insert the BLED112 bluetooth dongle and let the driver install (more details here).

BLED112 bluetooth dongle (not required for Chromebooks).

A LEGO Boost (17101) or LEGO WeDo 2.0 (45300) set or LEGO PoweredUp set (train, batmobile).

create sounds on the piezo sounder (WeDo only).

change colours of the RGB LED light on the hub.

control LEGO motors with varying speeds.

detect tilt, distance, colour, position using LEGO sensors.

wireless bluetooth connection to the LEGO hub.

The LEGO 'Powered Up' hub (as supplied with trains or batmobile kit) may be also be used. A BLED112 dongle is required to provide the bluetooth connection on the computer. The S2Bot app allows you to control LEGO Boost or LEGO WeDo 2.0 from within your Scratch (or Snap!) project running on a desktop computer (Windows, Mac, Linux, Chromebook). Using LEGO Boost / WeDo 2.0 / PoweredUp with Scratch and S2Bot

Wedo motor