Differences

This shows you the differences between two versions of the page.

--- en:help:v2:tracker [2020/06/17 14:41] – alpinequest
+++ en:help:v2:tracker [2021/09/07 11:11] – [Recorded track doesn't precisely follow my real locations] alpinequest
@@ Line 24: / Line 24: @@
 {{:icon_help.png?nolink}} At any time you can close the track recorder panel by tapping on the ''"**Close**"'' {{:icon_06.png?nolink}} icon, or even completely close the application, the track recorder will keep on recording locations in the background.
+If you have previously recorded some tracks, you can list them by taping on ''"**Recorded tracks**"'' {{:icon_07.png?nolink}} or get details on the last recorded track by taping ''"**Last recorded track**"'' {{:icon_08.png?nolink}}.
 {{ :en:help:v2:positioning:tracker-start.jpg?nolink }}
@@ Line 71: / Line 73: @@
 {{:icon_help.png?nolink}} You don't have to stop the track recorder during small breaks, the application will automatically detect that you're not moving and will take this into account when computing statistics.
-If you want to name the recorded track before stopping the recording, tap the track recorder menu icon {{:icon_02.png?nolink}}, and tap on the current track name {{:icon_03.png?nolink}}. You can name the recorded track at any time during the recording, or after stopping the track recorder by editing the track details. You can stop the recording by tapping ''"**Stop**"'' {{:icon_04.png?nolink}}.
+If you want to name the recorded track before stopping the recording, tap the track recorder menu icon {{:icon_02.png?nolink}}, and tap on the current track name {{:icon_03.png?nolink}}. You can name the recorded track at any time during the recording, or after stopping the track recorder by editing the track details. You can also stop the recording from this menu by tapping ''"**Stop**"'' {{:icon_04.png?nolink}}.
 Once you've stopped the track recorder, the last recorded track will be displayed in the ''"**Last recorded track**"'' {{:icon_06.png?nolink}} section, from where you can:
@@ Line 169: / Line 171: @@
 ===== Problems with the track recorder =====
 {{ :en:help:v2:positioning:tracker-setup-location.jpg?nolink}}
+Most (if not all) of the tracking problems are due to the battery optimisations made by the Android system itself. Commonly, the GPS is disabled when the screen is turned off, or background applications are killed after some delay.
+You need to correctly setup your device and be sure that:
+  * The application (it's tracking service) is not stopped by the system after some time;
+  * The GPS remains available to applications even if the screen is turned off.
+There are usually only a few settings to change (see above section [[en:help:v2:tracker#how_to_correctly_setup_your_device_for_background_track_recording|here]]), but some device brands add their own economy tools and more settings may need to be changed. In case of problems, please contact your device's brand help desk to ask how to disable battery optimisation related to the GPS.
+{{:icon_help.png?nolink }} There is unfortunately nothing we can do if the device system stops the application or the GPS by itself.
+\\
 ==== Track not correctly recorded when the screen is turned off ====
-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.
+On top of the Android battery optimization tools (see above section [[en:help:v2:tracker#how_to_correctly_setup_your_device_for_background_track_recording|here]]), 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.
 For example, you can check that the application is allowed to access to your GPS location even when the device is not used (screen off) as you can see on the right.
@@ Line 204: / Line 218: @@
 For some devices (like Huawei Mate 10), a system update can also fix this problem.
+{{:icon_help.png?nolink}} More information can be found on [[https://dontkillmyapp.com/|dontkillmyapp.com]].
 ==== The track recorder service stops ====
@@ Line 215: / Line 231: @@
 ==== Recorded track doesn't precisely follow my real locations ====
-Some devices perform better than others when using the GPS, depending on the quality of the hardware used and the internal conception (placement 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 Galaxy S9 {{:icon_01.png?nolink}} performs better than the Huawei P10 Lite {{:icon_02.png?nolink}}.
+Some devices perform better than others when using the GPS, depending on the quality of the hardware used and the internal conception (placement 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 Galaxy S9 {{:icon_01.png?nolink}} performs better than the Huawei P10 Lite {{:icon_02.png?nolink}}. [[https://docs.google.com/spreadsheets/d/1jXtRCoEnnFNWj6_oFlVWflsf-b0jkfZpyhN-BXsv7uo/edit#gid=0|Here is a very interesting list]] describing the hardware used in a large number of devices.
 {{ :en:help:v2:positioning:tracker-compare.jpg?nolink }}