Mindstorms hub

[rickjansen-dev]

I'd love to add documentation about the mindstorms hub here. If only it would use LWP that would help..

The LWP gatt service is not reported by the device. Compare this output from bluetoothctl in linux from the Technic Hub vs the mindstorms hub:

[bluetooth]# info 90:84:2B:5A:60:33
Device 90:84:2B:5A:60:33 (public)
        Name: Technic Hub
        Alias: Technic Hub
        Appearance: 0x1800
        Paired: no
        Trusted: no
        Blocked: no
        Connected: no
        LegacyPairing: no
        UUID: Vendor specific           (00001623-1212-efde-1623-785feabcd123)
        UUID: Generic Access Profile    (00001800-0000-1000-8000-00805f9b34fb)
        UUID: Generic Attribute Profile (00001801-0000-1000-8000-00805f9b34fb)
        ManufacturerData Key: 0x0397
        ManufacturerData Value:
  00 80 06 00 41 00                                ....A.          
        RSSI: -51
        TxPower: 0

info 38:0B:3C:AE:0B:4F
Device 38:0B:3C:AE:0B:4F (public)
        Name: LEGO Hub 38:0B:3C:AE:0B:4F
        Alias: LEGO Hub 38:0B:3C:AE:0B:4F
        Class: 0x00000804
        Paired: yes
        Trusted: no
        Blocked: no
        Connected: no
        LegacyPairing: no
        UUID: Vendor specific           (00000000-deca-fade-deca-deafdecacaff)
        UUID: Serial Port               (00001101-0000-1000-8000-00805f9b34fb)
        UUID: PnP Information           (00001200-0000-1000-8000-00805f9b34fb)
        Modalias: bluetooth:v0397p0002d0001
        RSSI: -40
        TxPower: 0

The mindstorms hub apparently uses a BT serial port (and does not use BLE for that matter?). I have been looking around to see if someone started on reverse engineering the serial protocol for this, haven't found anything useful really.

[tthiery]

Yeah would be open for that.

[rickjansen-dev]

Here's some more details of the internals of the device: https://github.com/gpdaniels/spike-prime