Bluetooth LE Android tablet not connecting with Lego Boost Move Hub

android bluetooth lego
MTI picture MTI · Aug 20, 2017 · Viewed 9.9k times · Source

I am not able to connect my Android Nexus 7 tablet running the Lego Boost application with the Lego Boost "Move Hub".

How can I make it to work?

Answer

MTI picture MTI · Aug 20, 2017

The Android Nexus 7 tablet comes with Bluetooth 4.0 which includes Low Energy, aka BTLE (https://en.wikipedia.org/wiki/Nexus_7_(2013))

Interestingly, Lego list BTLE 4.1 and higher as compatible Android device (https://www.lego.com/en-us/service/device-guide/boost). In theory I should not be able to connect with BTLE 4.0 (weird?!)

I have been able to install the Lego Boost application on Android 5.1.1 (Kernel 3.4, BTLE 4.0), but was not able to pass the first couple of pop-up screens in the application. The application requires a successful connection with the Move Hub over BTLE before giving access to the building instructions.

After reviewing the documentation provided with Lego Boost, I found a note related to strong electromagnetic interferences and also a way to reset the Move Hub (main brick).

To reset the brick you need to press the green button on top of the hub and keep in pressed for 10 seconds.

After the reset, I was able to connect to the Move Hub over BTLE 4.0 via my Nexus 7 tablet (and got Frankie the Cat going).

Hope that helps,

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