Getting issue in setting the interval for location update in database

[GurjeetLamba]

Your Environment

"react-native-background-fetch": "^4.1.10", "react-native-background-geolocation": "^4.12.1",

• Platform: Android
• OS version: 12
• Device manufacturer and model: OPPO CPH2095
• React Native version: 0.64
• Plugin config

  const state:State = await BackgroundGeolocation.ready({
      url:"https://hkdk.events/9JXddKxb5fnn",
     reset: false,
     debug: true,
      locationTemplate: '{"Latitude":<%= latitude %>,"Longitude":<%= longitude %>,"TimeStamp": "<%= timestamp %>"}',
      autoSync:true,
      deferTime:180000,
   
      params: {
      ClientId:respo_storage.data.ClientId,
     
      },
      headers: { 
     authorization: "Bearer "+getToken.data.Token, 
      source:source
      },
      logLevel: BackgroundGeolocation.LOG_LEVEL_VERBOSE,
      desiredAccuracy: BackgroundGeolocation.DESIRED_ACCURACY_HIGH,
      distanceFilter: 0,
      locationUpdateInterval:180000,
      allowIdenticalLocations:false,
      stopTimeout: 5,
      fastestLocationUpdateInterval:180000,
   
      locationAuthorizationRequest: 'Always',
      backgroundPermissionRationale: {
        title: "Allow {applicationName} to access this device's location even when closed or not in use.",
        message: "This app collects location data to enable recording your trips to work and calculate distance-travelled.",
        positiveAction: 'Change to "{backgroundPermissionOptionLabel}"',
        negativeAction: 'Cancel'
      },
      maxDaysToPersist: 14,
     
      stopOnTerminate: false,
      startOnBoot: true,
      enableHeadless: true,
    
    });

## Expected Behavior
Location must be updated in db exactly after 3 min even in still mode or moving ## Actual Behavior

Actual Behaviour
Location is updating most after 3 min but in rare cases it updates after 2 min , and multiple locations at same time## Steps to 

[GurjeetLamba]

This issue is not resolved yet

[christocracy]

reset: false,

Do you know what this does? Why do you set it to false?

[GurjeetLamba]

This was set to false in Demo Application provided in the library , I didn't get the meaning of it What exactly it is doing

[christocracy]

Delete that whole line from your Config reset: false.

[GurjeetLamba]

ok

[GurjeetLamba]

Tried deleting this but Still getting issue with the Accuracy If I use locationUpdateInterval instead of distance filter , Its our requirement that we need to update location after specific interval also getting issue with still mode , latitude and longitude are not accurate in still mode const state: State = await BackgroundGeolocation.ready({

  url: "http://92.204.135.120:8099/TomAPI/SaveLocationInformation",
  debug: true,
  logLevel: BackgroundGeolocation.LOG_LEVEL_VERBOSE,
  desiredAccuracy: BackgroundGeolocation.DESIRED_ACCURACY_NAVIGATION,
  distanceFilter: 0,
  locationUpdateInterval: interval,
  stopTimeout: 5,
  locationTemplate: '{"Latitude":<%= latitude %>,"Longitude":<%= longitude %>,"TimeStamp": "<%= timestamp %>"}',
  locationAuthorizationRequest: 'Always',
  backgroundPermissionRationale: {
    title: "Allow {applicationName} to access this device's location even when closed or not in use.",
    message: "This app collects location data to enable recording your trips to work and calculate distance-travelled.",
    positiveAction: 'Change to "{backgroundPermissionOptionLabel}"',
    negativeAction: 'Cancel'
  },
  headers: {
    authorization: "Bearer " + getToken.data.Token,
    source: source
  },
  params: {
    ClientId: respo_storage.data.ClientId,
  },
  batchSync: true,
  autoSync: true,
  maxDaysToPersist: 14,
  stopOnTerminate: false,
  startOnBoot: true,
  enableHeadless: true
});

[christocracy]

latitude and longitude are not accurate in still mode

What makes you suspect that they’re “not accurate”?

[GurjeetLamba]

I am showing the lat long on map and it is showing in slightly different position from where I was actually situated

[christocracy]

And why are you not showing me this map?

[GurjeetLamba]

ok I will share the map screenshot also

[GurjeetLamba]

As shown in the image the marker showing away (at 9.13) is at the time when I was at my home where a group of markers are shown

[christocracy]

Do you know that the geolocation accuracy while indoors is 40-60 meters? GPS only works outdoors (accuracy ~5 meters).

Do you know that a geolocation is not a simple point in space? It’s a circle of probability with radius location.coords.accuracy meters. The real location of the device is somewhere in that circle.

[christocracy]

I suggest you go outside for a nice long test of >1km.

[GurjeetLamba]

@christocracy We are facing this issue sometimes during walk also, If I use distance filter accuracy is better, But we need to update location after a time interval in minutes(3 min. or 5 min) thats why I am using locationUpdateInterval , but getting issue in accuracy with it and while in still mode interval also get disturbs location update after random intervals

[christocracy]

Plugin version:0.6.3

There is no such thing as 0.6.3. Where do you get this version number from?

[GurjeetLamba]

sorry I have updated the version number , I am using the latest version for both the libraries , Please suggest something for location update interval issue

[christocracy]

I have no suggestion for your problem.

it’s recommended to use distanceFilter, it saves energy. Do you know that iOS doesn’t even allow time based location updates?

[GurjeetLamba]

yes , but Is there any other way that I could know for how long the device is in still mode , so that I can send this to API that device is not moving in this time , then I can use distance Filter also which is giving better accuracy ,As I tested today

[christocracy]

but Is there any other way that I could know for how long the device is in still mode

That would be the time-difference between onMotionChange events.

[GurjeetLamba]

if device is in still mode for 15 minutes then onMotionChange event will occur if device moves after 15 minutes ?

[christocracy]

Have you read the wiki “Philosophy of Operation”?

do you understand what Config.stopTimeout is?

do you understand when onMotionChange fires?

[GurjeetLamba]

yes , but I was just confirming

[GurjeetLamba]

In the First Image , It is the location when I left from my home on vehicle (at 8:15) and In second screenshot it is the location where I stopped , In between that I didn't got any location , But when I was coming back to home all the locations are uploaded

[christocracy]

Looks good to me.

[GurjeetLamba]

But after 8:15 I got only one location at 8:23 , What could be the reason of that gap ? Now I am using distance filter

[christocracy]

I have no idea. Why don’t you fetch the logs from the plug-in with .emailLog method and see what the plug-in was saying in its logs?

[christocracy]

See wiki Debugging

[GurjeetLamba]

I have no idea. Why don’t you fetch the logs from the plug-in with .emailLog method and see what the plug-in was saying in its logs?

ok

[GurjeetLamba]

69ce9530-d4e6-41f2-8035-3b90d5653bcf.gz

I am not able to read the error from logs , please help me here

[christocracy]

The file is gzipped. You need to unzip it.