Bugfix for #1024 (gsm modem re-camping) done
Michael 'Mickey' Lauer
mickey at vanille-media.de
Fri Aug 21 20:48:20 CEST 2009
> today i did the rework for bug #1024 to my freerunner. First i tried to
> remove C1009 and replace it with a 22µF capacitor but i had no luck
> getting it off the board with my tools. Maybe it was glued to good and i
> have no smd tweezer iron to heat up both ends of C1009 at the same time.
> So i used the solution where i added a 10µF capacitor parallel to the
> existing one. My rework is based on  by Dieter Spaar.
> I documented my rework process with a few pictures available here .
> Now i only need a reliable testcase where i can see if the rework helped
> or not. Is there any scenario i can try to find out if #1024 is fixed or
Visit the city at noon. Shut down all processes using the modem. Use
mickeyterm to talk with the modem. Use the following sequence of commands:
Then, watch the unsolicited messages +CREG and +CSQ coming around for a while
and post them here for analysis. The problem pattern is when you frequently
receive a +CSQ: 99,99 followed after a +CREG=2, then back into +CSQ != 99 and
More information about the community