<div dir="ltr"><div>Hey Aleksander, </div><div> </div><div>They have similar data but not in the same order for example +CTZE URC is <tz>,<dst>,<time>, so like this "+32",0,"2018/03/23,06:51:13" but for CTZU it's like this <tz>,<time>,<dst> "+32","2018/03/23,06:51:13",0 and for Cinterion the dst is optional </div><div> </div><div>Thanks for the advice to get the signal, you are right I should use libmm-glib shipped with ModemManager. I changed to this <div style="color:rgb(187,187,187);background-color:rgb(40,44,52);font-family:"Fira Code","Droid Sans Mono","monospace",monospace,"Droid Sans Fallback","Droid Sans Mono","monospace",monospace;font-weight:normal;font-size:14px;line-height:19px;white-space:pre"><div> GList *l = NULL;</div><div> int ret = 0;</div><div> GList *modem_list = g_dbus_object_manager_get_objects(G_DBUS_OBJECT_MANAGER(manager));</div> <div> for (l = modem_list; l; l = g_list_next(l))</div><div> {</div><div> MMObject *obj;</div><div> MMModemTime *modem_time;</div><div> obj = MM_OBJECT(l->data);</div><div> modem_time = MM_MODEM_TIME(mm_object_peek_modem_time(obj));</div><div> if (ret = g_signal_connect(modem_time, NETWORK_TIME_CHANGED_DBUS_SIGNAL, </div><div> G_CALLBACK(update_local_modem_time), NULL) <= 0)</div><div> {</div><div> DBG_PRINT("Failed to connect signal %s to modem %d\n", "network-time-changed", ret);</div><div> }</div><div> }</div></div></div><div> </div><div>Best regards, </div><div></div></div> <div class="gmail_quote"><div dir="ltr" class="gmail_attr">Le mer. 3 mai 2023 à 15:12, Aleksander Morgado <<a href="mailto:aleksandermj@chromium.org">aleksandermj@chromium.org</a>> a écrit : </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Hey Thomas, > I do get the +CTZU notification, but it worked differently for quectel because it doesn't receive the new time we need to check for +CTZE that's the URC that we get when we receive notification that the time has been changed. What is the format of the +CTZE URC? is it similar to +CTZU? how are they different? > For my use case, I would like to update my local time automatically on a linux environment using modemmanager with quectel modules. > So right now I manage to change cinterion's function to process +CTZE events and I receive the signal like this > GDBusProxy *proxy = g_dbus_proxy_new_sync(connection, > G_DBUS_PROXY_FLAGS_NONE, > NULL, > "org.freedesktop.ModemManager1", > modemPath, > "org.freedesktop.ModemManager1.Modem.Time", > NULL, > &error); > if (error != NULL) { > g_printerr("Error creating ModemManager1.Modem proxy: %s\n", error->message); > g_error_free(error); > return 1; > } > > g_signal_connect(proxy, "g-properties-changed", G_CALLBACK(update_local_time), NULL); > } > But I'm not sure it's the best way to process the signal Wondering, why not use the libmm-glib we ship with ModemManager instead of manually creating the proxies and parsing the list of updated properties? E.g. you could: * create a new MMManager with mm_manager_new() * list the MMObjects it handles with g_dbus_object_manager_get_objects() * get a MMModemTime interface object with mm_object_get_modem_time() * listen to the "network-time-changed" signal -- Aleksander </blockquote></div>