Hello Andreas, On Tue, 01 Nov 2011 12:28:05 +0100, "jolly" <andreas@eversberg.eu> wrote:

i removed the delay, and it works. i checked the tsm30 source code. it also sets the IO to input right after writing the last TX byte. (i guess that the controller will trigger the IO switching at the end of transmission.) so why do we need that delay? are there any problems?

I can't tell you exactly what went wrong (it was months ago that I worked on this part). But most certainly one of my Test SIMs did not work without this delay. So I would suggest to leave a comment at this place in case problems with certain SIMs occur. Best regards, Dieter -- Dieter Spaar, Germany spaar@mirider.augusta.de