Sleep GPS near homepoints, wait for significant motion sensor.

First attempts, will test for a few days.

app/src/main/java/net/voussoir/trkpt/MapFragment.kt

@@ -30,9 +30,7 @@ import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
 import android.view.WindowManager
-import android.widget.Button
+import android.widget.*
-import android.widget.EditText
-import android.widget.TextView
 import androidx.activity.result.contract.ActivityResultContracts.RequestPermission
 import androidx.core.content.ContextCompat
 import androidx.core.view.isVisible
@@ -62,13 +60,9 @@ class MapFragment : Fragment()
 
     private var bound: Boolean = false
     val handler: Handler = Handler(Looper.getMainLooper())
-    private var trackingState: Int = Keys.STATE_TRACKING_STOPPED
-    private var gpsProviderActive: Boolean = false
-    private var networkProviderActive: Boolean = false
-    private lateinit var currentBestLocation: Location
 
     var continuous_auto_center: Boolean = true
-    private lateinit var trackerService: TrackerService
+    private var trackerService: TrackerService? = null
     private lateinit var database_changed_listener: DatabaseChangedListener
 
     var thismapfragment: MapFragment? = null
@@ -79,6 +73,8 @@ class MapFragment : Fragment()
     lateinit var zoom_in_button: FloatingActionButton
     lateinit var zoom_out_button: FloatingActionButton
     lateinit var currentLocationButton: FloatingActionButton
+    lateinit var map_current_time: TextView
+    lateinit var power_level_indicator: ImageButton
     private var current_track_overlay: Polyline? = null
     private var current_position_overlays = ArrayList<Overlay>()
     private var homepoints_overlays = ArrayList<Overlay>()
@@ -107,8 +103,6 @@ class MapFragment : Fragment()
                 update_main_button()
             }
         }
-        currentBestLocation = getLastKnownLocation(requireContext())
-        trackingState = PreferencesHelper.loadTrackingState()
     }
 
     /* Overrides onStop from Fragment */
@@ -121,6 +115,8 @@ class MapFragment : Fragment()
         currentLocationButton = rootView.findViewById(R.id.location_button)
         zoom_in_button = rootView.findViewById(R.id.zoom_in_button)
         zoom_out_button = rootView.findViewById(R.id.zoom_out_button)
+        map_current_time = rootView.findViewById(R.id.map_current_time)
+        power_level_indicator = rootView.findViewById(R.id.power_level_indicator)
         mainButton = rootView.findViewById(R.id.main_button)
         locationErrorBar = Snackbar.make(mapView, String(), Snackbar.LENGTH_INDEFINITE)
 
@@ -200,9 +196,7 @@ class MapFragment : Fragment()
             trackbook.database_changed_listeners.add(database_changed_listener)
         }
 
-        create_current_position_overlays(currentBestLocation, trackingState)
+        centerMap(getLastKnownLocation(requireContext()))
-
-        centerMap(currentBestLocation)
 
         current_track_overlay = null
 
@@ -213,9 +207,14 @@ class MapFragment : Fragment()
 
         update_main_button()
         mainButton.setOnClickListener {
-            if (trackingState == Keys.STATE_TRACKING_ACTIVE)
+            val tracker = trackerService
+            if (tracker == null)
             {
-                trackerService.stopTracking()
+                return@setOnClickListener
+            }
+            if (tracker.trackingState == Keys.STATE_TRACKING_ACTIVE)
+            {
+                tracker.stopTracking()
             }
             else
             {
@@ -224,7 +223,12 @@ class MapFragment : Fragment()
             handler.postDelayed(location_update_redraw, 0)
         }
         currentLocationButton.setOnClickListener {
-            centerMap(currentBestLocation, animated=true)
+            val tracker = trackerService
+            if (tracker == null)
+            {
+                return@setOnClickListener
+            }
+            centerMap(tracker.currentBestLocation, animated=true)
         }
         zoom_in_button.setOnClickListener {
             mapView.controller.setZoom(mapView.zoomLevelDouble + 0.5)
@@ -256,6 +260,7 @@ class MapFragment : Fragment()
     {
         Log.i("VOUSSOIR", "MapFragment.onResume")
         super.onResume()
+        redraw()
         requireActivity().window.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON)
         // if (bound) {
         //     trackerService.addGpsLocationListener()
@@ -268,26 +273,31 @@ class MapFragment : Fragment()
     {
         Log.i("VOUSSOIR", "MapFragment.onPause")
         super.onPause()
-        if (::trackerService.isInitialized)
-        {
-            trackerService.mapfragment = null
-        }
-        saveBestLocationState(currentBestLocation)
-        if (bound && trackingState != Keys.STATE_TRACKING_ACTIVE) {
-            trackerService.removeGpsLocationListener()
-            trackerService.removeNetworkLocationListener()
-            trackerService.trackbook.database.commit()
-        }
         requireActivity().window.clearFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON)
+
+        val tracker = trackerService
+        if (tracker == null)
+        {
+            return
+        }
+        saveBestLocationState(tracker.currentBestLocation)
+        tracker.mapfragment = null
+        if (bound && tracker.trackingState != Keys.STATE_TRACKING_ACTIVE)
+        {
+            tracker.removeGpsLocationListener()
+            tracker.removeNetworkLocationListener()
+            tracker.trackbook.database.commit()
+        }
     }
 
     /* Overrides onStop from Fragment */
     override fun onStop()
     {
         super.onStop()
-        if (::trackerService.isInitialized)
+        val tracker = trackerService
+        if (tracker != null)
         {
-            trackerService.mapfragment = null
+            tracker.mapfragment = null
         }
         // unbind from TrackerService
         if (bound)
@@ -311,7 +321,10 @@ class MapFragment : Fragment()
     {
         Log.i("VOUSSOIR", "MapFragment.onDestroy")
         super.onDestroy()
-        trackerService.mapfragment = null
+        if (trackerService != null)
+        {
+            trackerService!!.mapfragment = null
+        }
         requireActivity().window.clearFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON)
     }
 
@@ -328,6 +341,8 @@ class MapFragment : Fragment()
             // permission denied - unbind service
             activity?.unbindService(connection)
         }
+        val gpsProviderActive = if (trackerService == null) false else trackerService!!.gpsProviderActive
+        val networkProviderActive = if (trackerService == null) false else trackerService!!.networkProviderActive
         toggleLocationErrorBar(gpsProviderActive, networkProviderActive)
     }
 
@@ -344,7 +359,10 @@ class MapFragment : Fragment()
         {
             activity?.startService(intent)
         }
-        trackerService.startTracking()
+        if (trackerService != null)
+        {
+            trackerService!!.startTracking()
+        }
     }
 
 
@@ -354,24 +372,14 @@ class MapFragment : Fragment()
         bound = false
         // unregister listener for changes in shared preferences
         PreferencesHelper.unregisterPreferenceChangeListener(sharedPreferenceChangeListener)
-        if (::trackerService.isInitialized)
+        if (trackerService != null)
         {
-            trackerService.mapfragment = null
+            trackerService!!.mapfragment = null
         }
     }
 
     private val sharedPreferenceChangeListener = SharedPreferences.OnSharedPreferenceChangeListener { sharedPreferences, key ->
-        when (key)
+        redraw()
-        {
-            Keys.PREF_TRACKING_STATE ->
-            {
-                if (activity != null)
-                {
-                    trackingState = PreferencesHelper.loadTrackingState()
-                }
-            }
-        }
-        update_main_button()
     }
 
     fun centerMap(location: Location, animated: Boolean = false) {
@@ -557,6 +565,7 @@ class MapFragment : Fragment()
 
     fun update_main_button()
     {
+        val tracker = trackerService
         mainButton.isEnabled = trackbook.database.ready
         currentLocationButton.isVisible = true
         if (! trackbook.database.ready)
@@ -564,13 +573,13 @@ class MapFragment : Fragment()
             mainButton.text = requireContext().getString(R.string.button_not_ready)
             mainButton.icon = null
         }
-        else if (trackingState == Keys.STATE_TRACKING_STOPPED)
+        else if (tracker == null || tracker.trackingState == Keys.STATE_TRACKING_STOPPED)
         {
             mainButton.setIconResource(R.drawable.ic_fiber_manual_record_inactive_24dp)
             mainButton.text = requireContext().getString(R.string.button_start)
             mainButton.contentDescription = requireContext().getString(R.string.descr_button_start)
         }
-        else if (trackingState == Keys.STATE_TRACKING_ACTIVE)
+        else if (tracker.trackingState == Keys.STATE_TRACKING_ACTIVE)
         {
             mainButton.setIconResource(R.drawable.ic_fiber_manual_stop_24dp)
             mainButton.text = requireContext().getString(R.string.button_pause)
@@ -609,11 +618,9 @@ class MapFragment : Fragment()
             }
             bound = true
             trackerService = serviceref
-            trackerService.mapfragment = thismapfragment
+            trackerService!!.mapfragment = thismapfragment
             // get state of tracking and update button if necessary
-            trackingState = trackerService.trackingState
+            redraw()
-            update_main_button()
-            handler.postDelayed(location_update_redraw, 0)
             // register listener for changes in shared preferences
             PreferencesHelper.registerPreferenceChangeListener(sharedPreferenceChangeListener)
             // start listening for location updates
@@ -625,27 +632,57 @@ class MapFragment : Fragment()
         }
     }
 
-    val location_update_redraw: Runnable = object : Runnable
+    fun redraw()
     {
-        override fun run()
+        // Log.i("VOUSSOIR", "MapFragment.redraw")
+        update_main_button()
+        val tracker = trackerService
+        if (tracker == null)
         {
-            Log.i("VOUSSOIR", "MapFragment.location_update_redraw")
+            return
-            currentBestLocation = trackerService.currentBestLocation
+        }
-            gpsProviderActive = trackerService.gpsProviderActive
+        create_current_position_overlays(tracker.currentBestLocation, tracker.trackingState)
-            networkProviderActive = trackerService.networkProviderActive
-            trackingState = trackerService.trackingState
-
-            create_current_position_overlays(currentBestLocation, trackingState)
         if (current_track_overlay == null)
         {
             create_track_overlay()
         }
-            current_track_overlay!!.setPoints(trackerService.recent_trackpoints_for_mapview)
+        current_track_overlay!!.setPoints(tracker.recent_trackpoints_for_mapview)
 
         if (continuous_auto_center)
         {
-                centerMap(currentBestLocation, animated=false)
+            centerMap(tracker.currentBestLocation, animated=false)
+        }
+
+        map_current_time.text = iso8601_local_noms(tracker.currentBestLocation.time)
+
+        if (tracker.arrived_at_home == 0L)
+        {
+            power_level_indicator.setImageResource(R.drawable.ic_satellite_24dp)
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+                power_level_indicator.tooltipText = "GPS tracking at full power"
+            }
+        }
+        else if (tracker.location_interval == tracker.LOCATION_INTERVAL_SLEEP)
+        {
+            power_level_indicator.setImageResource(R.drawable.ic_sleep_24dp)
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+                power_level_indicator.tooltipText = "GPS sleeping until movement"
+            }
+        }
+        else
+        {
+            power_level_indicator.setImageResource(R.drawable.ic_homepoint_24dp)
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+                power_level_indicator.tooltipText = "You are at home"
             }
         }
     }
+
+    val location_update_redraw: Runnable = object : Runnable
+    {
+        override fun run()
+        {
+            redraw()
+        }
+    }
 }

app/src/main/java/net/voussoir/trkpt/TrackFragment.kt

@@ -57,7 +57,6 @@ import org.osmdroid.views.overlay.TilesOverlay
 import org.osmdroid.views.overlay.simplefastpoint.SimpleFastPointOverlay
 import org.osmdroid.views.overlay.simplefastpoint.SimpleFastPointOverlayOptions
 import org.osmdroid.views.overlay.simplefastpoint.SimplePointTheme
-import java.text.SimpleDateFormat
 import java.util.*
 
 class TrackFragment : Fragment(), MapListener, YesNoDialog.YesNoDialogListener

app/src/main/java/net/voussoir/trkpt/TrackerService.kt

@@ -31,6 +31,10 @@ import android.content.Context
 import android.content.Intent
 import android.content.SharedPreferences
 import android.content.pm.PackageManager
+import android.hardware.Sensor
+import android.hardware.SensorManager
+import android.hardware.TriggerEvent
+import android.hardware.TriggerEventListener
 import android.location.Location
 import android.location.LocationListener
 import android.location.LocationManager
@@ -39,23 +43,14 @@ import android.media.ToneGenerator
 import android.os.Binder
 import android.os.Build
 import android.os.IBinder
+import android.os.Vibrator
 import android.util.Log
 import androidx.annotation.RequiresApi
 import androidx.appcompat.content.res.AppCompatResources
 import androidx.core.app.NotificationCompat
 import androidx.core.content.ContextCompat
 import androidx.core.graphics.drawable.toBitmap
-import net.voussoir.trkpt.helpers.PreferencesHelper
+import net.voussoir.trkpt.helpers.*
-import net.voussoir.trkpt.helpers.getDefaultLocation
-import net.voussoir.trkpt.helpers.getLastKnownLocation
-import net.voussoir.trkpt.helpers.isAccurateEnough
-import net.voussoir.trkpt.helpers.isBetterLocation
-import net.voussoir.trkpt.helpers.isDifferentEnough
-import net.voussoir.trkpt.helpers.isGpsEnabled
-import net.voussoir.trkpt.helpers.isNetworkEnabled
-import net.voussoir.trkpt.helpers.isRecentEnough
-import net.voussoir.trkpt.helpers.iso8601_local
-import net.voussoir.trkpt.helpers.random_device_id
 import org.osmdroid.util.GeoPoint
 import java.lang.ref.WeakReference
 import java.util.*
@@ -70,7 +65,11 @@ class TrackerService: Service()
     var device_id: String = random_device_id()
     var currentBestLocation: Location = getDefaultLocation()
     var lastCommit: Long = 0
-    var location_min_time_ms: Long = 0
+    var last_significant_motion: Long = 0
+    var arrived_at_home: Long = 0
+    var location_interval: Long = 0
+    val LOCATION_INTERVAL_FULLPOWER: Long = 0
+    val LOCATION_INTERVAL_SLEEP: Long = Keys.ONE_MINUTE_IN_MILLISECONDS
     private val RECENT_TRKPT_COUNT = 3600
     private val DISPLACEMENT_LOCATION_COUNT = 5
     lateinit var recent_displacement_locations: Deque<Location>
@@ -94,7 +93,10 @@ class TrackerService: Service()
 
     var mapfragment: MapFragment? = null
 
-    private fun addGpsLocationListener()
+    private lateinit var sensor_manager: SensorManager
+    private var significant_motion_sensor: Sensor? = null
+
+    private fun addGpsLocationListener(interval: Long)
     {
         if (! use_gps_location)
         {
@@ -124,7 +126,7 @@ class TrackerService: Service()
 
         locationManager.requestLocationUpdates(
             LocationManager.GPS_PROVIDER,
-            location_min_time_ms,
+            interval,
             0f,
             gpsLocationListener,
         )
@@ -132,7 +134,7 @@ class TrackerService: Service()
         Log.i("VOUSSOIR", "Added GPS location listener.")
     }
 
-    private fun addNetworkLocationListener()
+    private fun addNetworkLocationListener(interval: Long)
     {
         if (! use_network_location)
         {
@@ -162,7 +164,7 @@ class TrackerService: Service()
 
         locationManager.requestLocationUpdates(
             LocationManager.NETWORK_PROVIDER,
-            0,
+            interval,
             0f,
             networkLocationListener,
         )
@@ -198,6 +200,27 @@ class TrackerService: Service()
         }
     }
 
+    fun reset_location_listeners(interval: Long)
+    {
+        location_interval = interval
+        if (gpsLocationListenerRegistered)
+        {
+            removeGpsLocationListener()
+        }
+        if (networkLocationListenerRegistered)
+        {
+            removeNetworkLocationListener()
+        }
+        if (use_gps_location)
+        {
+            addGpsLocationListener(interval)
+        }
+        if (use_network_location)
+        {
+            addNetworkLocationListener(interval)
+        }
+    }
+
     private fun createLocationListener(): LocationListener
     {
         return object : LocationListener
@@ -208,17 +231,11 @@ class TrackerService: Service()
 
                 // beeper.startTone(ToneGenerator.TONE_PROP_ACK, 150)
 
-                if (location.time == currentBestLocation.time)
+                if (location.time <= currentBestLocation.time)
                 {
                     return
                 }
 
-                if (! isBetterLocation(location, currentBestLocation))
-                {
-                    Log.i("VOUSSOIR", "Not better than previous.")
-                    return
-                }
-
                 currentBestLocation = location
 
                 val mf = mapfragment
@@ -241,16 +258,12 @@ class TrackerService: Service()
                     Log.i("VOUSSOIR", "Omitting due to 0,0 location.")
                     return
                 }
-                if (! isRecentEnough(location))
+
-                {
+                // The Homepoint checks need to come before the other checks because if there
-                    Log.i("VOUSSOIR", "Omitting due to not recent enough.")
+                // is even the slightest chance that the user has left the homepoint, we want to
-                    return
+                // wake back up to full power. We do not want to put this below the isAccurateEnough
-                }
+                // of isRecentEnough checks because we already know that the sleeping GPS produces
-                if (! isAccurateEnough(location, Keys.DEFAULT_THRESHOLD_LOCATION_ACCURACY))
+                // very inaccurate points so if those bail early we'd stay in sleep mode.
-                {
-                    Log.i("VOUSSOIR", "Omitting due to not accurate enough.")
-                    return
-                }
                 for ((index, homepoint) in trackbook.homepoints.withIndex())
                 {
                     if (homepoint.location.distanceTo(location) < homepoint.radius)
@@ -261,9 +274,42 @@ class TrackerService: Service()
                             trackbook.homepoints.remove(homepoint)
                             trackbook.homepoints.addFirst(homepoint)
                         }
+                        if (arrived_at_home == 0L)
+                        {
+                            Log.i("VOUSSOIR", "Arrived at home.")
+                            arrived_at_home = System.currentTimeMillis()
+                        }
+                        else if (location_interval == LOCATION_INTERVAL_SLEEP || significant_motion_sensor == null)
+                        {
+                            // If we are already asleep, do not reset the listeners again because
+                            // that immediately fetches a new location.
+                            // If we cannot rely on the motion sensor, then don't sleep!
+                        }
+                        else if ((System.currentTimeMillis() - arrived_at_home) > Keys.ONE_MINUTE_IN_MILLISECONDS)
+                        {
+                            Log.i("VOUSSOIR", "Staying at home.")
+                            reset_location_listeners(interval=LOCATION_INTERVAL_SLEEP)
+                        }
                         return
                     }
                 }
+                if (arrived_at_home > 0)
+                {
+                    Log.i("VOUSSOIR", "Leaving home.")
+                    arrived_at_home = 0
+                    reset_location_listeners(interval=LOCATION_INTERVAL_FULLPOWER)
+                }
+
+                if (! isRecentEnough(location))
+                {
+                    Log.i("VOUSSOIR", "Omitting due to not recent enough.")
+                    return
+                }
+                if (! isAccurateEnough(location, Keys.DEFAULT_THRESHOLD_LOCATION_ACCURACY))
+                {
+                    Log.i("VOUSSOIR", "Omitting due to not accurate enough.")
+                    return
+                }
                 if (recent_displacement_locations.isEmpty())
                 {
                     // pass
@@ -321,13 +367,20 @@ class TrackerService: Service()
 
     private fun displayNotification(): Notification
     {
-        val timestamp = iso8601_local(currentBestLocation.time)
+        val timestamp = iso8601_local_noms(currentBestLocation.time)
         if (shouldCreateNotificationChannel())
         {
             createNotificationChannel()
         }
 
+        if (location_interval == LOCATION_INTERVAL_SLEEP)
+        {
+            notification_builder.setContentText("${timestamp} (sleeping)")
+        }
+        else
+        {
             notification_builder.setContentText(timestamp)
+        }
         notification_builder.setWhen(currentBestLocation.time)
 
         if (trackingState == Keys.STATE_TRACKING_ACTIVE)
@@ -400,8 +453,7 @@ class TrackerService: Service()
     {
         Log.i("VOUSSOIR", "TrackerService.onBind")
         bound = true
-        addGpsLocationListener()
+        reset_location_listeners(interval=LOCATION_INTERVAL_FULLPOWER)
-        addNetworkLocationListener()
         return binder
     }
 
@@ -410,8 +462,7 @@ class TrackerService: Service()
     {
         Log.i("VOUSSOIR", "TrackerService.onRebind")
         bound = true
-        addGpsLocationListener()
+        reset_location_listeners(interval=LOCATION_INTERVAL_FULLPOWER)
-        addNetworkLocationListener()
     }
 
     /* Overrides onUnbind from Service */
@@ -466,6 +517,31 @@ class TrackerService: Service()
     override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int
     {
         Log.i("VOUSSOIR", "TrackerService.onStartCommand")
+
+        val vibrator = getSystemService(Context.VIBRATOR_SERVICE) as Vibrator
+        sensor_manager = getSystemService(Context.SENSOR_SERVICE) as SensorManager
+        significant_motion_sensor = sensor_manager.getDefaultSensor(Sensor.TYPE_SIGNIFICANT_MOTION)
+        if (significant_motion_sensor != null)
+        {
+            val triggerEventListener = object : TriggerEventListener() {
+                override fun onTrigger(event: TriggerEvent?) {
+                    Log.i("VOUSSOIR", "Significant motion")
+                    // beeper.startTone(ToneGenerator.TONE_PROP_ACK, 150)
+                    vibrator.vibrate(50)
+                    last_significant_motion = System.currentTimeMillis()
+                    arrived_at_home = 0L
+                    if (location_interval == LOCATION_INTERVAL_SLEEP)
+                    {
+                        reset_location_listeners(LOCATION_INTERVAL_FULLPOWER)
+                        val mf = mapfragment
+                        mf?.handler?.postDelayed(mf.location_update_redraw, 0)
+                    }
+                    sensor_manager.requestTriggerSensor(this, significant_motion_sensor)
+                }
+            }
+            sensor_manager.requestTriggerSensor(triggerEventListener, significant_motion_sensor)
+        }
+
         // SERVICE RESTART (via START_STICKY)
         if (intent == null)
         {
@@ -507,8 +583,8 @@ class TrackerService: Service()
     fun startTracking()
     {
         Log.i("VOUSSOIR", "TrackerService.startTracking")
-        addGpsLocationListener()
+        arrived_at_home = 0
-        addNetworkLocationListener()
+        reset_location_listeners(interval=LOCATION_INTERVAL_FULLPOWER)
         trackingState = Keys.STATE_TRACKING_ACTIVE
         PreferencesHelper.saveTrackingState(trackingState)
         recent_displacement_locations.clear()
@@ -519,7 +595,8 @@ class TrackerService: Service()
     {
         Log.i("VOUSSOIR", "TrackerService.stopTracking")
         trackbook.database.commit()
-
+        arrived_at_home = 0
+        reset_location_listeners(interval=LOCATION_INTERVAL_FULLPOWER)
         trackingState = Keys.STATE_TRACKING_STOPPED
         PreferencesHelper.saveTrackingState(trackingState)
         recent_displacement_locations.clear()
@@ -533,26 +610,12 @@ class TrackerService: Service()
             Keys.PREF_LOCATION_GPS ->
             {
                 use_gps_location = PreferencesHelper.load_location_gps()
-                if (use_gps_location)
+                reset_location_listeners(interval=LOCATION_INTERVAL_FULLPOWER)
-                {
-                    addGpsLocationListener()
-                }
-                else
-                {
-                    removeGpsLocationListener()
-                }
             }
             Keys.PREF_LOCATION_NETWORK ->
             {
                 use_network_location = PreferencesHelper.load_location_network()
-                if (use_network_location)
+                reset_location_listeners(interval=LOCATION_INTERVAL_FULLPOWER)
-                {
-                    addNetworkLocationListener()
-                }
-                else
-                {
-                    removeNetworkLocationListener()
-                }
             }
             Keys.PREF_USE_IMPERIAL_UNITS ->
             {

app/src/main/java/net/voussoir/trkpt/functions.kt

@@ -20,16 +20,10 @@ fun iso8601_local(timestamp: Long): String
     return iso8601_format.format(timestamp)
 }
 
-fun iso8601(datetime: Date): String
+fun iso8601_local_noms(timestamp: Long): String
 {
-    return iso8601(datetime.time)
+    val iso8601_format = SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss")
-}
+    return iso8601_format.format(timestamp)
-
-fun iso8601_parse(datetime: String): Date
-{
-    val iso8601_format = SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'")
-    iso8601_format.timeZone = TimeZone.getTimeZone("UTC")
-    return iso8601_format.parse(datetime)
 }
 
 fun random_int(): Int

app/src/main/res/drawable/ic_satellite_24dp.xml

@@ -0,0 +1,13 @@
+<!--
+Thank you
+https://pictogrammers.com/library/mdi/icon/satellite-variant/
+-->
+<vector
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:height="24dp"
+    android:width="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path android:fillColor="@color/icon_default"
+        android:pathData="M11.62,1L17.28,6.67L15.16,8.79L13.04,6.67L11.62,8.09L13.95,10.41L12.79,11.58L13.24,12.04C14.17,11.61 15.31,11.77 16.07,12.54L12.54,16.07C11.77,15.31 11.61,14.17 12.04,13.24L11.58,12.79L10.41,13.95L8.09,11.62L6.67,13.04L8.79,15.16L6.67,17.28L1,11.62L3.14,9.5L5.26,11.62L6.67,10.21L3.84,7.38C3.06,6.6 3.06,5.33 3.84,4.55L4.55,3.84C5.33,3.06 6.6,3.06 7.38,3.84L10.21,6.67L11.62,5.26L9.5,3.14L11.62,1M18,14A4,4 0 0,1 14,18V16A2,2 0 0,0 16,14H18M22,14A8,8 0 0,1 14,22V20A6,6 0 0,0 20,14H22Z" />
+</vector>

app/src/main/res/drawable/ic_sleep_24dp.xml

@@ -0,0 +1,14 @@
+<!--
+Thank you
+https://pictogrammers.com/library/mdi/icon/sleep/
+-->
+<vector
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:height="24dp"
+    android:width="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="@color/icon_default"
+        android:pathData="M23,12H17V10L20.39,6H17V4H23V6L19.62,10H23V12M15,16H9V14L12.39,10H9V8H15V10L11.62,14H15V16M7,20H1V18L4.39,14H1V12H7V14L3.62,18H7V20Z" />
+</vector>

app/src/main/res/layout/fragment_map.xml

@@ -87,6 +87,29 @@
             app:layout_constraintEnd_toEndOf="parent"
             app:tint="@color/location_button_icon" />
 
+        <TextView
+            android:id="@+id/map_current_time"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="16dp"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toTopOf="parent"
+            />
+
+        <ImageButton
+            android:id="@+id/power_level_indicator"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginStart="16dp"
+            android:layout_marginTop="16dp"
+            android:src="@drawable/ic_satellite_24dp"
+            app:backgroundTint="@color/default_transparent"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toTopOf="parent"
+            app:srcCompat="@drawable/ic_satellite_24dp"
+            app:tint="@color/location_button_icon" />
+
         <!-- GROUPS -->
 
     </androidx.constraintlayout.widget.ConstraintLayout>