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</o:shapelayout></xml><![endif]--></head><body lang=DE-CH link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>At least it should be possible to switch off the feature. When parking at home there is no GSM/GPRS coverage in my garage. I do not want to get<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>an alert every day after I parked my car.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Pierre<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=DE style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>Von:</span></b><span lang=DE style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> ovmsdev-bounces@lists.teslaclub.hk [mailto:ovmsdev-bounces@lists.teslaclub.hk] <b>Im Auftrag von </b>Mark Webb-Johnson<br><b>Gesendet:</b> Dienstag, 15. Mai 2012 07:15<br><b>An:</b> OVMS Developers<br><b>Betreff:</b> [Ovmsdev] Car lost GPRS connection notification<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Rafael has suggested that we add a car-lost-gprs-connection notification to the OVMS system. The idea being that when your car loses GPRS connection (cellular coverage, fault, whatever), you get a notification to your app to let you know. And, presumably, another notification should it come back.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><ul type=disc><li class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level1 lfo1'>It is common for a car to lose cellular connection for a minute or so, then re-establish.<o:p></o:p></li><li class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level1 lfo1'>It is also reasonably common to lose connectivity when the GSM signal is lost.<o:p></o:p></li><li class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level1 lfo1'>It does seem a nice idea, and not too hard to do.<o:p></o:p></li></ul></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>The way it would work would be to have a threshold in the server. A notification time, presumably in seconds.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><ol start=1 type=1><li class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 level1 lfo2'>If a car disconnected (or 20 minute timeout was force disconnected), we would put a record in a pending table, timestamped NOW()+thresholdseconds.<o:p></o:p></li><li class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 level1 lfo2'>If the car connected, and the pending table has a record for that car, we would just remove the record.<o:p></o:p></li><li class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 level1 lfo2'>If the car connected, and there was no pending table record for that car, we would send a push notification for all apps on that car to tell them that the car is connected.<o:p></o:p></li><li class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 level1 lfo2'>Periodically, we check the pending table and if any records have timed out, we (a) send a push notification for all the apps on that car to tell them that the car has disconnected, and (b) remove the record.<o:p></o:p></li></ol></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>The result of this is that if the car disconnects for a short time, then reconnects, no notification is raised. But, if the car disconnects for a long time, you get a notification both when we find it has disconnected and when we see it reconnect. This can all be done from the server, irrespective of version of firmware in the car/apps.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><div><p class=MsoNormal>The questions are: (a) what do people think, (b) what should a reasonable timeout be, and (c) could this be _on_ for everyone.<o:p></o:p></p></div></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Would anyone here _not_ want this?<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>I would suggest a reasonable timeout, to alert after, would be an hour or so.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>It is easier to code this if it is universally on for everyone - we can just have a single timeout in the server. If we want individual control, we'd have to have a setting per-vehicle and provide the users a mechanism to change that setting. That would be much more work.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Regards, Mark.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div></div></body></html>