Is "SIM Toolkit" possible to support on the freerunner?

Helge Hafting helge.hafting at
Thu Mar 26 11:20:33 CET 2009

Michael 'Mickey' Lauer wrote:
> Am Mittwoch, den 25.03.2009, 14:13 +0100 schrieb Helge Hafting:
>> Michael 'Mickey' Lauer wrote:
>>> Technically, SIM toolkit support is possible with the Calypso.
>>> I have commented previously about this, so please look my older posts
>>> up; In a nutshell, STK is a heavy cross-layer spec, so adding it would
>>> need quit some thought.
>>> FSO will not work on it, but appreciate patches.
>> Is there hope of getting the necessary documentation for the gsm device 
>> in the freerunner? With a license that doesn't stand in the way of 
>> making a open-source app based on it?
> If you're interested in doing this, I'm sure we can work this out.
>> STK itself seems to be documented on the net, but each gsm device seems 
>> to do this differently. There is no standard on how to communicate STK 
>> to/from a gsm device.
> Correct. While the STK commands are thorougly documented in the specs, the AT commands are device-specific.
> I can collect the Calypso-specific information you need -- if you want to work on that.

I'm interested. I'd like to get this banking stuff working at least. 
That ought to get other "get some user input" apps working too.

Helge Hafting

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