Dear all,
could you please help me with the following issue. I use U-Blox
SARA-U270 modem. I'm able to online it and connect to GPRS using both:
connman and ofono-tests. The problem occurs when modem loses GSM link.
What I did:
- Boot board with ofono 1.18
- activate-context & process-context-settings
- ifconfig shows ppp0, everything works
- Disconnect physical GSM antenna, network strength becomes 0 (in
list-modems)
- Connect antenna, network strength becomes 40
Problem:
After these steps, modem doesn't reconnect to GPRS, while
list-contexts shows correct settings:
[ /ublox_0 ]
[ /ublox_0/context1 ]
Username = t-mobile
AuthenticationMethod = chap
Protocol = ip
Name = Internet
Settings = { Interface=ppp0 Netmask=255.255.255.255
Method=static DomainNameServers=10.74.210.210,10.74.210.211,
Address=10.23.6.118 }
IPv6.Settings = { }
Active = 1
AccessPointName = internet.t-mobile
Password = tm
Type = internet
But I don't see ppp0 interface.
An attempt to activate-context doesn't do anything, just empty output
(with enabled debugging).
Attempt to deactivate-context failed with:
Error deactivating /ublox_0/context1:
org.freedesktop.DBus.Error.NoReply: Did not receive a reply. Possible
causes include: the remote application did not send a reply, the message
bus security policy blocked
The only hard modem reset helps.
Moreover, after antenna disconnect, there is no more cellular service in
ConnMan. Only daemon restart helps.
How should I handle lose GSM network events to keep ppp0 up? Why ofonod
hangs with the steps mentioned above?
--
With best regards,
Alexander Smirnov
ilbers GmbH
Baierbrunner Str. 28c
D-81379 München
+49 (89) 122 67 24-0
http://ilbers.de/
Commercial register Munich, HRB 214197
General manager: Baurzhan Ismagulov
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