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Lukas Kuzmiak lukash at backstep.netThis is maybe a bit off-topic, but you may find easier implementing this as purely software/firmware thing for simtrace itself rather than building a separate device :) Cheers! Lukas On Thu, Jun 28, 2012 at 1:31 PM, Kevin Redon <kevredon at mail.tsaitgaist.info>wrote: > Hi, > > Excerpts from Gabriele.rago's message of Thu Jun 28 12:38:52 +0200 2012: > > Hello all, I would do a sim-emulator software that runs on my PC. > > > > First thing to do is a an interface to connect my PC with sim slot phone. > > > > So I am using this simple interface : > > > > > > I took a CP2102 module, see this page for example > > http://esaid.free.fr/Cdotnet/USB_serial.htm, > > > > then I have put a diode between TXD and RXD, then I have connected RXD to > > I/O of phone sim slot, > > > > DSR of CP2102 module to RESET of phone sim slot and connected the two > > grounds. > > > > > SIM cards come in different classes (different operating voltages). First > check if this is matching. > One important point is that you are completely ignoring the CLK pin. > Thus you baudrate might not match the one set by the phone, and > additionally you can also be out of sync with the clock. > Some old phone have a fixed standard baudrate, that might help (use an > osci to debug). > > kevin > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.osmocom.org/pipermail/simtrace/attachments/20120628/191ec472/attachment.htm>