Dell Chromebook 3100 - Scratch and Bluetooth with Microbit

For some reason the Scratch app installed on the Dell 3100 Chromebook just would not pick up the Microbit through bluetooth connection. It worked on other older Chromebook.

I can’t be the anyone who’s having such issue. We tried it on a few different chromebooks with the same user account and it’s still the same. Is this a known issue?