Alex: You are probably trying to draw too much power through the USB port from the BBB. I would try the same setup, but using a Powered USB Hub. See if any of your hubs have a wall-wart accessory that can power the hub directly, and take the power load for all the USB devices away from the BBB.
--- Graham == On Sunday, February 28, 2016 at 1:25:16 PM UTC-6, [email protected] wrote: > > Hi all, > > So i have a bealge bone black with a 4.3 LCD cape running on debian. I > also have a usb hub with 4 output. I currently use 3 of these output (wifi > dongle, usb key and a prolific usb to DB9 serial adapter). > > The serial adapter is here to read some values from an industrial scale. > > Here is the problem. if the BBB is connected to a computer via the mini > usb port, everything run well. (with an without a 2.5 amp on the power > barrel.) > > The second that i disconnect the BBB from the computer, the serial adapter > will only receive 0xff caracter. Iv'e tried on others computer with DB9 > connector to exclude the scale from the equation. > > I have no clue and I can't leave a computer connecter to the BBB just to > get the serial adapter happy... > > ps. I have 3 different serial adapter and same result for all. Also 3 > different usb hub. > > > Thanks in advance > > Alex > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
