<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><br></div><div>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.</div><div><br></div><div><ul class="MailOutline"><li>It is common for a car to lose cellular connection for a minute or so, then re-establish.</li><li>It is also reasonably common to lose connectivity when the GSM signal is lost.</li><li>It does seem a nice idea, and not too hard to do.</li></ul></div><div><br></div><div>The way it would work would be to have a threshold in the server. A notification time, presumably in seconds.</div><div><br></div><div><ol class="MailOutline"><li>If a car disconnected (or 20 minute timeout was force disconnected), we would put a record in a pending table, timestamped NOW()+thresholdseconds.</li><li>If the car connected, and the pending table has a record for that car, we would just remove the record.</li><li>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.</li><li>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.</li></ol></div><div><br></div><div>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.</div><div><br></div><div><div>The questions are: (a) what do people think, (b) what should a reasonable timeout be, and (c) could this be _on_ for everyone.</div></div><div><br></div><div>Would anyone here _not_ want this?</div><div><br></div><div>I would suggest a reasonable timeout, to alert after, would be an hour or so.</div><div><br></div><div>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.</div><div><br></div><div>Regards, Mark.</div><div><br></div></body></html>