[Gta04-owner] ANN GTA04A3: Milestone reached!

Benedikt Bär | Relamp.tk beniwtv at relamp.tk
Fri Oct 7 22:15:58 CEST 2011

Hi Nikolaus,

On Fri, 2011-10-07 at 21:57 +0200, Dr. H. Nikolaus Schaller wrote:
> Hi all,
> I am happy to announce that almost all of the produced GTA04EA boards
> have passed the tests and are ready to ship on Monday!

Let me be the first to say: Congrats!

> They already passed the automatic tests (using the GTA04 Tester
> system) some days ago, which did show that CPU, GPS, WLAN,
> Bluetooth, I2C sensors work and the UMTS module responds on USB.
> Each board will have a test report like this:
> One final test made us quite some headaches: is the board really
> a Telephone?
> After successfully initiating voice calls on the first 3 boards, the
> next 4 boards did not work. And, the originally tested for good
> boards didn't pass the test again. So we did fear that our software
> damages the modules. Or that we have a loose connection, opening
> with increasing temperatures.
> After two long days of trying everything (even soldering small
> wires to the PCM voice interface to inspect the signals) it turned
> out that we better should not send one specific AT command to
> the module, if the call is already established. It will simply mute
> the PCM voice channel within the module but will not interrupt
> the line...
> Now everything appears to work well enough that we
> don't expect that you have to send the unit back on the next day :)

While I am not an EA, I appreciate this effort to get it bug-free. The
GTA02 problems I'd rather not repeat :).

> Here they are:
> Thanks again for your patience and encouragement! Without
> knowing that you are out there eagerly waiting for a new
> powerful and state of the art motherboard for the GTA02
> system, it would have been much easier to give up and buy
> some <insert brand> and try to port Linux onto it. And have in
> approx. 2 years just 95% working :)
> But now we know all details of the design and there will be
> plenty of documentation of every GPIO line.
> So what will come after we have shipped the EA boards?
> We will start to make a new GTA04A4 layout to fix the hardware
> bugs, without having to cut traces and add small wires which is
> very expensive in production. And, we will ask for quotations
> for PCBs, components, production etc. As soon as we have that,
> we can finally annouce price and timing and start to accept
> preorders for the next batch.

Looking forward to ordering one soon!


> Nikolaus Schaller
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> Gta04-owner at goldelico.com
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