First of all, here is the link to the wiki I was talking about: http://gumstix.org/getting-started.html
As for the USB hubs, it may not be obvious from the documentation, but they do come with their own 5V power supply (about 2 Amps!)
The type of cable I mentioned with the Digikey part number, is also available from Gumstix. Delivery is just faster from Digikey.
However a straight mini-B to mini-B cable WILL NOT WORK. I ordered several before I figured out what was wrong L
You need a “Mini-A to Mini-B” cable. They look the same, which sucks, but one of the pins on the connector is grounded.
This web site has a good explanation of the various cable types: http://www.accesscomms.com.au/Reference/USB.htm
Depending on how handy with a soldering iron you are J I spliced the power connector for the Tobi and the connector for the hub
together and connected them both to the same 5V 2 Amp power cube. Works like a charm …
"People sleep peaceably in their beds at night only because rough men
stand ready to do violence on their behalf." - George Orwell
On Thu, Jul 21, 2011 at 11:28 AM, Curtis Olson <email@example.com> wrote:
USB Hubs that work for me: Belkin F5U700-blk – 7 port hub
Belkin F5U403-blk - 4 port hub
The 7 port hub had trouble powering high power devices (Alpha WiFi adapter).
Hi Bill, I appreciate your responses, but when I look up these devices I don't see any evidence that they are externally powered. Have you been able to use the USB-*OTG* port on the Tobi without an externally powered HUB?
Hi Bill, ok, I do see that in one of the later pictures on the newegg site, there's a port for power and a power supply with the 4-port hub you listed. So as best as I can tell,
The both USB-HOST and USB-OTG ports seem to require a hub to get them to do anything (at least with the devices I've tested.) And in addition, the USB-OTG port doesn't provide 5v power so to use the USB-OTG port requires not just a hub, but an externally powered hub.
Does this jive with other folks understanding?
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