Smart TX

[valentintintin]

Speed ? Difference between last pos ? Time ?

[valentintintin]

aaff00e + a93ab56

[valentintintin]

Use time between tx conditioned by speed, angle etc

Idea : https://github.com/N7ILK/DRA818V_Tracker/blob/master/DRA818V_APRS.ino

[valentintintin]

Code from APRSDroid :

/*
 * Decompiled with CFR 0.0.
 * 
 * Could not load the following classes:
 *  android.content.Context
 *  android.location.Location
 *  android.location.LocationListener
 *  android.location.LocationManager
 *  android.os.Bundle
 *  android.util.Log
 *  android.widget.Toast
 *  java.lang.Boolean
 *  java.lang.Float
 *  java.lang.IllegalArgumentException
 *  java.lang.Object
 *  java.lang.String
 *  scala.math.package$
 */
package org.aprsdroid.app;

import android.content.Context;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.util.Log;
import android.widget.Toast;
import org.aprsdroid.app.AprsService;
import org.aprsdroid.app.LocationSource;
import org.aprsdroid.app.PrefsWrapper;
import scala.Predef$;
import scala.collection.Seq;
import scala.collection.immutable.StringOps;
import scala.collection.mutable.StringBuilder;
import scala.math.package$;

public final class SmartBeaconing
extends LocationSource
implements LocationListener {
    private final String TAG;
    private volatile boolean bitmap$0;
    private Location lastLoc;
    private LocationManager locMan;
    private final PrefsWrapper prefs;
    private final AprsService service;
    private boolean started;

    public SmartBeaconing(AprsService aprsService, PrefsWrapper prefsWrapper) {
        this.service = aprsService;
        this.prefs = prefsWrapper;
        this.TAG = "APRSdroid.SmartBeaconing";
        this.lastLoc = null;
        this.started = false;
    }

    private LocationManager locMan() {
        if (this.bitmap$0) {
            return this.locMan;
        }
        return this.locMan$lzycompute();
    }

    private LocationManager locMan$lzycompute() {
        SmartBeaconing smartBeaconing = this;
        synchronized (smartBeaconing) {
            if (!this.bitmap$0) {
                this.locMan = (LocationManager)this.service.getSystemService("location");
                this.bitmap$0 = true;
            }
            return this.locMan;
        }
    }

    /*
     * Enabled aggressive block sorting
     */
    public final void onLocationChanged(Location location) {
        boolean bl;
        if (this.lastLoc == null) {
            bl = true;
        } else {
            boolean bl2;
            float f;
            int n = this.prefs.getStringInt("sb.turntime", 15);
            int n2 = this.prefs.getStringInt("sb.turnmin", 10);
            double d = 1.0 * (double)this.prefs.getStringInt("sb.turnslope", 240);
            float f2 = location.getSpeed();
            long l = location.getTime() - this.lastLoc.getTime();
            float f3 = location.getBearing();
            float f4 = package$.abs((float)(f3 - (f = this.lastLoc.getBearing()))) % 360.0f;
            if (!(f4 <= 180.0f)) {
                f4 = 360.0f - f4;
            }
            if (location.hasBearing() && f2 != 0.0f) {
                if (this.lastLoc.hasBearing()) {
                    double d2 = (double)n2 + d / (2.23693629 * (double)f2);
                    String string = this.TAG;
                    StringOps stringOps = new StringOps(Predef$.augmentString("smartBeaconCornerPeg: %1.0f < %1.0f %d/%d"));
                    Object[] arrobject = new Object[]{Float.valueOf((float)f4), d2, l / 1000L, n};
                    Log.d((String)string, (String)stringOps.format(Predef$.genericWrapArray(arrobject)));
                    bl2 = l / 1000L >= (long)n && (double)f4 > d2;
                } else {
                    bl2 = l / 1000L >= (long)n;
                }
            } else {
                bl2 = false;
            }
            if (bl2) {
                bl = true;
            } else {
                float f5 = location.distanceTo(this.lastLoc);
                long l2 = location.getTime() - this.lastLoc.getTime();
                float f6 = location.distanceTo(this.lastLoc);
                long l3 = location.getTime() - this.lastLoc.getTime();
                float f7 = package$.max((float)package$.max((float)(f6 * 1000.0f / (float)l3), (float)location.getSpeed()), (float)this.lastLoc.getSpeed());
                double d3 = (double)this.prefs.getStringInt("sb.fastspeed", 100) / 3.6;
                int n3 = this.prefs.getStringInt("sb.fastrate", 60);
                double d4 = (double)this.prefs.getStringInt("sb.slowspeed", 5) / 3.6;
                int n4 = this.prefs.getStringInt("sb.slowrate", 1200);
                if (!((double)f7 <= d4)) {
                    n4 = (double)f7 >= d3 ? n3 : (int)((double)n3 + (double)(n4 - n3) * (d3 - (double)f7) / (d3 - d4));
                }
                String string = this.TAG;
                StringOps stringOps = new StringOps(Predef$.augmentString("smartBeaconCheck: %1.0fm, %1.2fm/s -> %d/%ds - %s"));
                Object[] arrobject = new Object[5];
                arrobject[0] = Float.valueOf((float)f5);
                arrobject[1] = Float.valueOf((float)f7);
                arrobject[2] = l2 / 1000L;
                arrobject[3] = n4;
                boolean bl3 = l2 / 1000L >= (long)n4;
                arrobject[4] = Boolean.valueOf((boolean)bl3).toString();
                Log.d((String)string, (String)stringOps.format(Predef$.genericWrapArray(arrobject)));
                if (l2 / 1000L < (long)n4) return;
                bl = true;
            }
        }
        if (!bl) return;
        this.lastLoc = location;
        this.service.postLocation(location);
    }

    /*
     * Enabled aggressive block sorting
     */
    public final void onProviderDisabled(String string) {
        Log.d((String)this.TAG, (String)new StringBuilder().append((Object)"onProviderDisabled: ").append((Object)string).toString());
        if (string == null || !string.equals((Object)"gps")) {
            return;
        }
        Toast.makeText((Context)this.service, (int)2131099697, (int)1).show();
    }

    public final void onProviderEnabled(String string) {
        Log.d((String)this.TAG, (String)new StringBuilder().append((Object)"onProviderEnabled: ").append((Object)string).toString());
    }

    public final void onStatusChanged(String string, int n, Bundle bundle) {
        Log.d((String)this.TAG, (String)new StringBuilder().append((Object)"onStatusChanged: ").append((Object)string).toString());
    }

    /*
     * Enabled aggressive block sorting
     * Enabled unnecessary exception pruning
     * Enabled aggressive exception aggregation
     */
    @Override
    public final String start(boolean bl) {
        this.lastLoc = null;
        if (this.started) return this.service.getString(2131099788);
        try {
            this.locMan().requestLocationUpdates("gps", 0L, 0.0f, (LocationListener)this);
            this.started = true;
        }
        catch (IllegalArgumentException illegalArgumentException) {
            this.service.postAbort(new StringBuilder().append((Object)this.service.getString(2131099697)).append((Object)"\n").append((Object)illegalArgumentException.getMessage()).toString());
            return this.service.getString(2131099788);
        }
        return this.service.getString(2131099788);
    }

    @Override
    public final void stop() {
        if (this.started) {
            this.locMan().removeUpdates((LocationListener)this);
        }
        this.started = false;
    }
}

[valentintintin]

http://www.hamhud.net/hh2/smartbeacon.html