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en:help:v2:tracker [2020/08/27 10:06]
alpinequest
en:help:v2:tracker [2021/09/07 11:11] (current)
alpinequest [Recorded track doesn't precisely follow my real locations]
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 {{ :​en:​help:​v2:​positioning:​tracker-setup-location.jpg?​nolink}} {{ :​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 ​application ​are killed after some delay.+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: 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 application (it's tracking service) is not stopped by the system after some time;
-  * The GPS remains available to apps even if the screen is turned off.+  * The GPS remains available to applications ​even if the screen is turned off.
  
-There are usually only a few settings to change, 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.+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. {{:​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 ==== ==== Track not correctly recorded when the screen is turned off ====
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 For some devices (like Huawei Mate 10), a system update can also fix this problem. 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 ==== ==== The track recorder service stops ====
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 ==== Recorded track doesn'​t precisely follow my real locations ==== ==== 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 }} {{ :​en:​help:​v2:​positioning:​tracker-compare.jpg?​nolink }}

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