Hi Christopher,
On 08/28/2012 10:19 AM, Christopher Vogl wrote:
Hi Denis,
On 23/08/12 19:37, Denis Kenzior wrote:
Hi Christopher,
Also, one other thing I'm concerned about is the CFUN=4 usage when we
try to set the modem offline. Your comments indicate that the Telit
modem resets the SIM when we issue CFUN=4. Going from Online True ->
False we don't actually want to reset the SIM. Does CFUN take an extra
parameter to turn SIM reset off by any chance?
Telit documentation says that +CFUN supports a second parameter which
should turn reset off.
AT+CFUN=? also returns +CFUN: (0,1,2,4,5),(0)
AT reference manual: "reset flag 0 - do not reset the ME before setting
it to <fun> functionality level"
But the modem keeps returning +CME ERROR: 4 when I try it (no matter
which CFUN level).
That is funny. Maybe the modem does not support a true 'offline' or
'airplane' mode. In which case the driver might need to be modified
somewhat.
This is something we will need to solve in the future. If not fixed,
I'm guessing that going Online then Offline will reset the SIM and
cause all kinds of funny behavior.
The modem behaves very strange sometimes. I kept getting timeouts when
setting AT+CFUN=4. I once tried it manually and it took 26 seconds until
I got an OK.
Currently it works fine again.
Is there a newer firmware available by any chance?
Telit support was so kind to send me a firmware version (08.01.108-B006)
which supports +CFUN without resetting.
I suppose this is not an official version yet and if I adapt the code in
the telit plugin I will probably be the only one who can use it.
Is it ok if I send a corrected version of this patch and change the
offline/online mode handling in a further patch when it is sure
supported by an official firmware version?
Just send it in, their official docs do mention the reset parameter, so
if the modem rejects it then that is a firmware bug. The end-user will
have to upgrade the firmware in that case.
Regards,
-Denis
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