ubuntu-phone team mailing list archive

[Nolaan <nolaan.d@xxxxxxxxx>]

Hi, 
It's always a bad idea to to use the usb port of a Rpi to power another device, 
especially when it draws a lot of current.

Le samedi 12 septembre 2015, 14:11:58 Ed Kapitein a écrit :
> Hi,
> i want to use a raspberry pi to charge the BQ 4.5, without a (powered) hub.
> The BQ is not charging when i plug it into the pi, and the pi never
> enumerates the BQ on its usb bus.
> 
> Is there a way to influence the power negotiation between the pi and the BQ?
> For example let the BQ start at 100mA and ramp it up to whatever the
> powersource can deliver.
> 
> Kind regards,
> Ed