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Originally Posted by b0rsuk
By the way, how does USB OTG look like?
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The existing hardware may support it, but I don't know for sure, from the usb.org FAQ:
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USB OTG defines a dual-role device, which can act as either a host or peripheral, and can connect to either a PC or other portable devices through the same connector.
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The Nokia N8X0 (also Linux based) has explicit OTG support, and I think the only issue for connected devices is the lack of power and the need for weird cables.
I doubt iRex will support OTG, because it is outside their concept of how the device is used. If the hardware is OTG-capable, it should be possible, though, to enable this via add-on system-level software (or just switch the connector to a master, which I think has also be done on the N8X0 via software).