Thanks Dave.

I will cut that trace.

Dave Hylands <> wrote:
Hi Patel,

On 6/26/07, ramanlal patel wrote:
> I was just wondering if that is the problem then why would gumstix
> manufacturer even sell basix-bt package.( basix-bt, robostix and tweener as
> a package).
> What kind of problem is that so kermit is not taking any input from
> keyboard? I am confuse.

The tweener was never really intended to be used with the robostix,
since the robostix has a console port on it (albeit a logic level
serial port). The tweener was designed to work with the original

The problem is that there is a 5v to 3.3v converter on the robostix
which is trying to control the Rx line to the gumstix, and the tweener
also has an RS-232 to 3.3v converter which is trying to control the Rx
line on the gumstix. What happens is that neither one works.

Cutting the trace disconnects the robostix voltage conveter and thus
there is only the tweener trying to drive the Rx line so everything
works fine.

I can't comment on why the tweener hasn't been fixed.

Dave Hylands
Vancouver, BC, Canada

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