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--- en:help:v2:tracker [2018/09/12 15:21] – [Problems with the track recorder] alpinequest
+++ en:help:v2:tracker [2019/01/27 22:56] – alpinequest
@@ Line 16: / Line 16: @@
   * Tap on the ''"**Positioning**"'' {{:icon_01.png?nolink}} menu icon and on the ''"**Track recorder toggle**"'' {{:icon_02.png?nolink}}.
-Alternatively, you can:
+Alternatively, you can:\\
   * Tap on the ''"**Positioning**"'' {{:icon_01.png?nolink}} menu icon;
   * Tap on ''"**Track recorder**"'' {{:icon_03.png?nolink}} to display the track recorder panel;
@@ Line 131: / Line 131: @@
 {{:icon_help.png?nolink}} The pressure values are automatically calibrated by the application using GPS locations.
+\\
+===== How to correctly setup your device for background track recording? =====
+\\
+In recent Android versions, multiple optimization tools have been added in order to reduce battery usage, especially targeting background applications. For example, the "Doze" mode will stop all applications on your device when your screen is turned off for some time. In order to correctly record tracks even when your screen is turned off, you need to disable those optimizations for the application.
+{{:icon_help.png?nolink}} Exact steps may very depending on your device brand and system version.
+__Example on Samsung devices__:
+  * In your devices settings, tap "**''Apps''**" {{:icon_01.png?nolink}};
+  * Tap the top/right menu icon {{:icon_02.png?nolink}} and "**''Special access''**" {{:icon_03.png?nolink}};
+{{ :en:help:v2:positioning:tracker-setup-doze-samsung-1.jpg?nolink }}
+  * Tap "**''Optimize battery usage''**" {{:icon_04.png?nolink}};
+  * Tap on the "**''Apps not optimized''**" {{:icon_05.png?nolink}} drop down list and select "**''All apps''**" {{:icon_06.png?nolink}};
+  * Locate and un-check "**''AlpineQuest''**" {{:icon_07.png?nolink}} do disable optimization for this application.
+{{ :en:help:v2:positioning:tracker-setup-doze-samsung-2.jpg?nolink }}
+\\
+__Example on Huawei devices__:
+  * In your devices settings, tap "**''Apps''**" {{:icon_01.png?nolink}};
+  * At the bottom of the applications list, tap "**''Settings''**" {{:icon_02.png?nolink}} and "**''Special access''**" {{:icon_03.png?nolink}};
+{{ :en:help:v2:positioning:tracker-setup-doze-huawei-1.jpg?nolink }}
+  * Tap "**''Ignore battery optimisation''**" {{:icon_04.png?nolink}};
+  * Tap on the "**''Allowed''**" {{:icon_05.png?nolink}} drop down list and select "**''All apps''**" {{:icon_06.png?nolink}};
+  * Locate and tap "**''AlpineQuest''**" {{:icon_07.png?nolink}}, check the "**''Allow''**" {{:icon_08.png?nolink}} option and tap "**''Ok''**" {{:icon_09.png?nolink}} to validate.
+{{ :en:help:v2:positioning:tracker-setup-doze-huawei-2.jpg?nolink }}
+An alternative how-to [[http://www.greenbot.com/article/3112224/android/what-you-need-to-know-about-doze-mode-in-android-nougat.html|is available here]].
+{{:icon_help.png?nolink}} Depending on your device, you may need to configure additional settings as explained below.
 \\
@@ Line 136: / Line 174: @@
 ===== Problems with the track recorder =====
 \\
-**Track not recorded when the screen is turned off or when another application is displayed**\\
+**Track not correctly recorded when the screen is turned off**\\
-Lot of recent devices come with a security and battery management application that doesn't allow an application to use the GPS when it's not displayed. Be sure to disable this behavior or grant the permission to use the GPS while in background. Here are some examples:
+On top of the Android battery optimization tools, some brands also include their own tools that may disable the use of GPS or network for background applications, and so prevent the good operation of the track recorder. Be sure to disable those behaviors or grant the application the correct permissions. Here are some examples:
-> For Huawei devices:
+__For Huawei devices__:
-> → //Settings > Power usage firewall > Close excessively power-intensive apps//
+  * In your devices settings, tap "**''Battery''**" {{:icon_01.png?nolink}};
-> → //Settings > Lock screen cleanup > be sure the application is not selected//
+  * Be sure not to have activated the "**''Power saving mode''**" {{:icon_02.png?nolink}} or the "**''Ultra power saving''**" {{:icon_03.png?nolink}};
-> → //Settings > Apps > Settings (bottom of the page) > Special access > Ignore optimisations > Change to all apps//
+  * Be sure not to have the AlpineQuest listed in the "**''Lock screen cleanup''**" {{:icon_04.png?nolink}} list;
-> For Xiaomi/Vivo devices ([[https://in.c.mi.com/thread-253478-1-0.html|see here]]):
+  * Tap on the "**''Settings''**" {{:icon_05.png?nolink}} icon;
-> → //Settings > App Settings > Permissions > Autostart//
+  * Un-check "**''Close excessively power-intensive apps''**" {{:icon_06.png?nolink}} to prevent the application from being closed.
-> → //Settings > App Settings > Permissions > Other permissions > Permissions > Start in background//
-> → //Settings > Battery > Manage apps battery usage > No restrictions//
-> For other devices:
-> → //Settings > Battery > Battery Optimization//
-For some devices (like Huawei Mate 10), a system update can also fix this problem.
+{{ :en:help:v2:positioning:tracker-setup-huawei.jpg?nolink }}
-**Track incompletely recorded**\\
+__For Xiaomi/Vivo devices__: ([[https://in.c.mi.com/thread-253478-1-0.html|see here]])
-Starting with Android 6, when the system thinks the device is not used it can automatically halt running applications for some time to reduce battery usage. During this time (called "doze" mode), the application is no more able to record the track, leading to skipped parts of the path. Hopefully, you can prevent this behavior by disabling the doze mode for the application from your system's battery optimisation settings:
+  * In your devices settings, tap "**''Battery & Performance''**";
+  * In the battery saver category, tap "**''Choose apps''**" {{:icon_01.png?nolink}};
+  * Locate and tap "**''AlpineQuest''**" {{:icon_02.png?nolink}};
+  * Tap "**''No restrictions''**" {{:icon_03.png?nolink}} to allow the application to run in the background without being closed;
+  * Tap the top application name {{:icon_04.png?nolink}} to validate and return to the applications list.
+{{ :en:help:v2:positioning:tracker-setup-xiaomi.jpg?nolink }}
+__For some other devices__:
 > → //Settings > Battery > Battery Optimization//
+> → //Settings > Battery > Manage apps battery usage > No restrictions//
-Under "All apps", select "AlpineQuest" and choose "Don't optimize". [[http://www.greenbot.com/article/3112224/android/what-you-need-to-know-about-doze-mode-in-android-nougat.html|More information is available here]].
+For some devices (like Huawei Mate 10), a system update can also fix this problem.
 **The track recorder service stops**\\
@@ Line 164: / Line 206: @@
 **Loss of the GPS signal**\\
 A common issue when recording a track is the loss of the GPS signal, leading to a missing part in the recorded track (seen as a straight line longer than usual). It usually happens because the device doesn't have a good enough access to the sky, for example when the device is placed in a deep pocket or in a bag. The GPS signal emitted by GPS satellites is weak and get easily lost when going through any material. If you have checked "**''Warn me if the GPS signal is lost or too weak''**" {{:icon_03.png?nolink}} option, the application will play a song when this happens.
+**Recorded track doesn't precisely follow my real locations**\\
+Some devices perform better than others while using the GPS, depending on the quality of the hardware used and internal conception (location of the GPS chip inside the device). Some devices require a stronger GPS signal to give an acceptable accuracy. For example, here is the same track recorded at the same time by two different devices (one in the left pocket, one in the right) during a small outside walk with occasional stays inside buildings. We can see that the Samsung S9 {{:icon_01.png?nolink}} performs better than the Huawei P10 Lite {{:icon_02.png?nolink}}.
+{{ :en:help:v2:positioning:tracker-compare.jpg?nolink }}
 **Device gets hot**\\