Calypso dance (GSM)

Michael Shiloh michael at
Mon Oct 20 02:57:44 CEST 2008

1: Great news!

2: I have a bag of SIM cards that one of our community members kindly 
donated to us, in order to help debug one problem. The cards came from 
junked phones and can not be used to connect to a network, but clearly 
exhibit the problem that some of them can be recognized, and some can not.

I've held on to them until now because I had not been able to identify 
anyone working on this problem.

It sounds like Dieter is the right person. Dieter, would you find these 
SIM cards useful? If so, please provide your shipping address and phone 
number and I'll send them off to you right away.


Werner Almesberger wrote:
> A few weeks ago, we redoubled our efforts to solve some of the
> longstanding problems in the GSM subsystem. The main objective was
> to finally solve the recamping problem, bug #1024.
> There have been some small good news: we managed to get TI's debugging
> and tracking utility PCO2 to run under Wine.
> Then there was a major breakthrough: independently, Mike Westerhof
> found the AT%SLEEP=2 work-around.
> And then the bummer: we discovered that we had lost our Calypso
> firmware sources :-( I'll skip the details to protect the guilty,
> but things looked rather bleak at that moment. Fortunately, we have
> since been able to recover the moko8 sources, and TI have sent us the
> updates that had been integrated since then.
> Around that time, Dieter Spaar, who is already familiar with that kind
> of firmware has contacted Joerg, and asked if we could use some help.
> Joerg then convinced the rest of us that this was indeed something
> worth trying :-)
> So, as a first step, we've contracted Dieter to bring that bag of code
> pieces into a buildable state again. This doesn't change the status
> quo regarding bugs and misfeature, but it's a precondition for
> actually doing anything about the problems.
> Now, this work is still in progress, but we can already look ahead at
> what issues we hope to be able to tackle:
> - #1024, everyone's favourite failure to use the network
> - #666, 3G SIM cards not being recognized
> - production may want to replace a memory chip, which may need a
>   small firmware change
> - suppressing/reducing the handset-mic audio feedback (which causes
>   echo for the remote party)
> Is there anything else directly relayed to the GSM firmware that
> should be on this list ?
> - Werner
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