git.gag.com Git - fw/altos/blob - altosdroid/src/org/altusmetrum/AltosDroid/TelemetryService.java

   1 /*
   2  * Copyright © 2012 Mike Beattie <mike@ethernal.org>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; version 2 of the License.
   7  *
   8  * This program is distributed in the hope that it will be useful, but
   9  * WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along
  14  * with this program; if not, write to the Free Software Foundation, Inc.,
  15  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  16  */
  17
  18 package org.altusmetrum.AltosDroid;
  19
  20 import java.lang.ref.WeakReference;
  21 import java.util.concurrent.TimeoutException;
  22 import java.util.*;
  23
  24 import android.app.Notification;
  25 //import android.app.NotificationManager;
  26 import android.app.PendingIntent;
  27 import android.app.Service;
  28 import android.bluetooth.BluetoothDevice;
  29 import android.bluetooth.BluetoothAdapter;
  30 import android.hardware.usb.*;
  31 import android.content.Intent;
  32 import android.content.Context;
  33 import android.os.Bundle;
  34 import android.os.IBinder;
  35 import android.os.Handler;
  36 import android.os.Message;
  37 import android.os.Messenger;
  38 import android.os.RemoteException;
  39 import android.os.Looper;
  40 import android.widget.Toast;
  41 import android.location.Criteria;
  42
  43 import org.altusmetrum.altoslib_11.*;
  44
  45 public class TelemetryService extends Service implements AltosIdleMonitorListener {
  46
  47         static final int MSG_REGISTER_CLIENT   = 1;
  48         static final int MSG_UNREGISTER_CLIENT = 2;
  49         static final int MSG_CONNECT           = 3;
  50         static final int MSG_OPEN_USB          = 4;
  51         static final int MSG_CONNECTED         = 5;
  52         static final int MSG_CONNECT_FAILED    = 6;
  53         static final int MSG_DISCONNECTED      = 7;
  54         static final int MSG_TELEMETRY         = 8;
  55         static final int MSG_SETFREQUENCY      = 9;
  56         static final int MSG_CRC_ERROR         = 10;
  57         static final int MSG_SETBAUD           = 11;
  58         static final int MSG_DISCONNECT        = 12;
  59         static final int MSG_DELETE_SERIAL     = 13;
  60         static final int MSG_BLUETOOTH_ENABLED = 14;
  61         static final int MSG_MONITOR_IDLE_START= 15;
  62         static final int MSG_MONITOR_IDLE_STOP = 16;
  63         static final int MSG_REBOOT            = 17;
  64         static final int MSG_IGNITER_QUERY     = 18;
  65         static final int MSG_IGNITER_FIRE      = 19;
  66
  67         // Unique Identification Number for the Notification.
  68         // We use it on Notification start, and to cancel it.
  69         private int NOTIFICATION = R.string.telemetry_service_label;
  70         //private NotificationManager mNM;
  71
  72         ArrayList<Messenger> clients = new ArrayList<Messenger>(); // Keeps track of all current registered clients.
  73         final Handler   handler   = new IncomingHandler(this);
  74         final Messenger messenger = new Messenger(handler); // Target we publish for clients to send messages to IncomingHandler.
  75
  76         // Name of the connected device
  77         DeviceAddress address;
  78         private AltosDroidLink  altos_link  = null;
  79         private TelemetryReader telemetry_reader = null;
  80         private TelemetryLogger telemetry_logger = null;
  81
  82         // Local Bluetooth adapter
  83         private BluetoothAdapter bluetooth_adapter = null;
  84
  85         // Last data seen; send to UI when it starts
  86         private TelemetryState  telemetry_state;
  87
  88         // Idle monitor if active
  89         AltosIdleMonitor idle_monitor = null;
  90
  91         // Igniter bits
  92         AltosIgnite ignite = null;
  93         boolean ignite_running;
  94
  95         // Handler of incoming messages from clients.
  96         static class IncomingHandler extends Handler {
  97                 private final WeakReference<TelemetryService> service;
  98                 IncomingHandler(TelemetryService s) { service = new WeakReference<TelemetryService>(s); }
  99
 100                 @Override
 101                 public void handleMessage(Message msg) {
 102                         DeviceAddress address;
 103
 104                         TelemetryService s = service.get();
 105                         AltosDroidLink bt = null;
 106                         if (s == null)
 107                                 return;
 108
 109                         switch (msg.what) {
 110
 111                                 /* Messages from application */
 112                         case MSG_REGISTER_CLIENT:
 113                                 s.add_client(msg.replyTo);
 114                                 break;
 115                         case MSG_UNREGISTER_CLIENT:
 116                                 s.remove_client(msg.replyTo);
 117                                 break;
 118                         case MSG_CONNECT:
 119                                 AltosDebug.debug("Connect command received");
 120                                 address = (DeviceAddress) msg.obj;
 121                                 AltosDroidPreferences.set_active_device(address);
 122                                 s.start_altos_bluetooth(address, false);
 123                                 break;
 124                         case MSG_OPEN_USB:
 125                                 AltosDebug.debug("Open USB command received");
 126                                 UsbDevice device = (UsbDevice) msg.obj;
 127                                 s.start_usb(device);
 128                                 break;
 129                         case MSG_DISCONNECT:
 130                                 AltosDebug.debug("Disconnect command received");
 131                                 s.address = null;
 132                                 if (!(Boolean) msg.obj)
 133                                         AltosDroidPreferences.set_active_device(null);
 134                                 s.disconnect(true);
 135                                 break;
 136                         case MSG_DELETE_SERIAL:
 137                                 AltosDebug.debug("Delete Serial command received");
 138                                 s.delete_serial((Integer) msg.obj);
 139                                 break;
 140                         case MSG_SETFREQUENCY:
 141                                 AltosDebug.debug("MSG_SETFREQUENCY");
 142                                 s.telemetry_state.frequency = (Double) msg.obj;
 143                                 if (s.telemetry_state.connect == TelemetryState.CONNECT_CONNECTED) {
 144                                         try {
 145                                                 s.altos_link.set_radio_frequency(s.telemetry_state.frequency);
 146                                                 s.altos_link.save_frequency();
 147                                         } catch (InterruptedException e) {
 148                                         } catch (TimeoutException e) {
 149                                         }
 150                                 }
 151                                 s.send_to_clients();
 152                                 break;
 153                         case MSG_SETBAUD:
 154                                 AltosDebug.debug("MSG_SETBAUD");
 155                                 s.telemetry_state.telemetry_rate = (Integer) msg.obj;
 156                                 if (s.telemetry_state.connect == TelemetryState.CONNECT_CONNECTED) {
 157                                         s.altos_link.set_telemetry_rate(s.telemetry_state.telemetry_rate);
 158                                         s.altos_link.save_telemetry_rate();
 159                                 }
 160                                 s.send_to_clients();
 161                                 break;
 162
 163                                 /*
 164                                  *Messages from AltosBluetooth
 165                                  */
 166                         case MSG_CONNECTED:
 167                                 AltosDebug.debug("MSG_CONNECTED");
 168                                 bt = (AltosDroidLink) msg.obj;
 169
 170                                 if (bt != s.altos_link) {
 171                                         AltosDebug.debug("Stale message");
 172                                         break;
 173                                 }
 174                                 AltosDebug.debug("Connected to device");
 175                                 try {
 176                                         s.connected();
 177                                 } catch (InterruptedException ie) {
 178                                 }
 179                                 break;
 180                         case MSG_CONNECT_FAILED:
 181                                 AltosDebug.debug("MSG_CONNECT_FAILED");
 182                                 bt = (AltosDroidLink) msg.obj;
 183
 184                                 if (bt != s.altos_link) {
 185                                         AltosDebug.debug("Stale message");
 186                                         break;
 187                                 }
 188                                 if (s.address != null) {
 189                                         AltosDebug.debug("Connection failed... retrying");
 190                                         s.start_altos_bluetooth(s.address, true);
 191                                 } else {
 192                                         s.disconnect(true);
 193                                 }
 194                                 break;
 195                         case MSG_DISCONNECTED:
 196
 197                                 /* This can be sent by either AltosDroidLink or TelemetryReader */
 198                                 AltosDebug.debug("MSG_DISCONNECTED");
 199                                 bt = (AltosDroidLink) msg.obj;
 200
 201                                 if (bt != s.altos_link) {
 202                                         AltosDebug.debug("Stale message");
 203                                         break;
 204                                 }
 205                                 if (s.address != null) {
 206                                         AltosDebug.debug("Connection lost... retrying");
 207                                         s.start_altos_bluetooth(s.address, true);
 208                                 } else {
 209                                         s.disconnect(true);
 210                                 }
 211                                 break;
 212
 213                                 /*
 214                                  * Messages from TelemetryReader
 215                                  */
 216                         case MSG_TELEMETRY:
 217                                 s.telemetry((AltosTelemetry) msg.obj);
 218                                 break;
 219                         case MSG_CRC_ERROR:
 220                                 // forward crc error messages
 221                                 s.telemetry_state.crc_errors = (Integer) msg.obj;
 222                                 s.send_to_clients();
 223                                 break;
 224                         case MSG_BLUETOOTH_ENABLED:
 225                                 AltosDebug.debug("TelemetryService notes that BT is now enabled");
 226                                 address = AltosDroidPreferences.active_device();
 227                                 if (address != null && !address.address.startsWith("USB"))
 228                                         s.start_altos_bluetooth(address, false);
 229                                 break;
 230                         case MSG_MONITOR_IDLE_START:
 231                                 AltosDebug.debug("start monitor idle");
 232                                 s.start_idle_monitor();
 233                                 break;
 234                         case MSG_MONITOR_IDLE_STOP:
 235                                 AltosDebug.debug("stop monitor idle");
 236                                 s.stop_idle_monitor();
 237                                 break;
 238                         case MSG_REBOOT:
 239                                 AltosDebug.debug("reboot");
 240                                 s.reboot_remote();
 241                                 break;
 242                         case MSG_IGNITER_QUERY:
 243                                 AltosDebug.debug("igniter query");
 244                                 s.igniter_query(msg.replyTo);
 245                                 break;
 246                         case MSG_IGNITER_FIRE:
 247                                 AltosDebug.debug("igniter fire");
 248                                 s.igniter_fire((String) msg.obj);
 249                                 break;
 250                         default:
 251                                 super.handleMessage(msg);
 252                         }
 253                 }
 254         }
 255
 256         /* Handle telemetry packet
 257          */
 258         private void telemetry(AltosTelemetry telem) {
 259                 AltosState      state;
 260
 261                 if (telemetry_state.states.containsKey(telem.serial))
 262                         state = telemetry_state.states.get(telem.serial).clone();
 263                 else
 264                         state = new AltosState();
 265                 telem.update_state(state);
 266                 telemetry_state.states.put(telem.serial, state);
 267                 if (state != null) {
 268                         AltosPreferences.set_state(state);
 269                 }
 270                 send_to_clients();
 271         }
 272
 273         /* Construct the message to deliver to clients
 274          */
 275         private Message message() {
 276                 if (telemetry_state == null)
 277                         AltosDebug.debug("telemetry_state null!");
 278                 if (telemetry_state.states == null)
 279                         AltosDebug.debug("telemetry_state.states null!");
 280                 return Message.obtain(null, AltosDroid.MSG_STATE, telemetry_state);
 281         }
 282
 283         /* A new friend has connected
 284          */
 285         private void add_client(Messenger client) {
 286
 287                 clients.add(client);
 288                 AltosDebug.debug("Client bound to service");
 289
 290                 /* On connect, send the current state to the new client
 291                  */
 292                 send_to_client(client);
 293                 send_idle_mode_to_client(client);
 294
 295                 /* If we've got an address from a previous session, then
 296                  * go ahead and try to reconnect to the device
 297                  */
 298                 if (address != null && telemetry_state.connect == TelemetryState.CONNECT_DISCONNECTED) {
 299                         AltosDebug.debug("Reconnecting now...");
 300                         start_altos_bluetooth(address, false);
 301                 }
 302         }
 303
 304         /* A client has disconnected, clean up
 305          */
 306         private void remove_client(Messenger client) {
 307                 clients.remove(client);
 308                 AltosDebug.debug("Client unbound from service");
 309
 310                 /* When the list of clients is empty, stop the service if
 311                  * we have no current telemetry source
 312                  */
 313
 314                  if (clients.isEmpty() && telemetry_state.connect == TelemetryState.CONNECT_DISCONNECTED) {
 315                          AltosDebug.debug("No clients, no connection. Stopping\n");
 316                          stopSelf();
 317                  }
 318         }
 319
 320         private void send_to_client(Messenger client) {
 321                 Message m = message();
 322                 try {
 323                         client.send(m);
 324                 } catch (RemoteException e) {
 325                         AltosDebug.error("Client %s disappeared", client.toString());
 326                         remove_client(client);
 327                 }
 328         }
 329
 330         private void send_to_clients() {
 331                 for (Messenger client : clients)
 332                         send_to_client(client);
 333         }
 334
 335         private void send_idle_mode_to_client(Messenger client) {
 336                 Message m = Message.obtain(null, AltosDroid.MSG_IDLE_MODE, idle_monitor != null);
 337                 try {
 338                         client.send(m);
 339                 } catch (RemoteException e) {
 340                         AltosDebug.error("Client %s disappeared", client.toString());
 341                         remove_client(client);
 342                 }
 343         }
 344
 345         private void send_idle_mode_to_clients() {
 346                 for (Messenger client : clients)
 347                         send_idle_mode_to_client(client);
 348         }
 349
 350         private void telemetry_start() {
 351                 if (telemetry_reader == null && idle_monitor == null && !ignite_running) {
 352                         telemetry_reader = new TelemetryReader(altos_link, handler);
 353                         telemetry_reader.start();
 354                 }
 355         }
 356
 357         private void telemetry_stop() {
 358                 if (telemetry_reader != null) {
 359                         AltosDebug.debug("disconnect(): stopping TelemetryReader");
 360                         telemetry_reader.interrupt();
 361                         try {
 362                                 telemetry_reader.join();
 363                         } catch (InterruptedException e) {
 364                         }
 365                         telemetry_reader = null;
 366                 }
 367         }
 368
 369         private void disconnect(boolean notify) {
 370                 AltosDebug.debug("disconnect(): begin");
 371
 372                 telemetry_state.connect = TelemetryState.CONNECT_DISCONNECTED;
 373                 telemetry_state.address = null;
 374
 375                 if (idle_monitor != null)
 376                         stop_idle_monitor();
 377
 378                 if (altos_link != null)
 379                         altos_link.closing();
 380
 381                 stop_receiver_voltage_timer();
 382
 383                 telemetry_stop();
 384                 if (telemetry_logger != null) {
 385                         AltosDebug.debug("disconnect(): stopping TelemetryLogger");
 386                         telemetry_logger.stop();
 387                         telemetry_logger = null;
 388                 }
 389                 if (altos_link != null) {
 390                         AltosDebug.debug("disconnect(): stopping AltosDroidLink");
 391                         altos_link.close();
 392                         altos_link = null;
 393                         ignite = null;
 394                 }
 395                 telemetry_state.config = null;
 396                 if (notify) {
 397                         AltosDebug.debug("disconnect(): send message to clients");
 398                         send_to_clients();
 399                         if (clients.isEmpty()) {
 400                                 AltosDebug.debug("disconnect(): no clients, terminating");
 401                                 stopSelf();
 402                         }
 403                 }
 404         }
 405
 406         private void start_usb(UsbDevice device) {
 407                 AltosUsb        d = new AltosUsb(this, device, handler);
 408
 409                 if (d != null) {
 410                         disconnect(false);
 411                         altos_link = d;
 412                         try {
 413                                 connected();
 414                         } catch (InterruptedException ie) {
 415                         }
 416                 }
 417         }
 418
 419         private void delete_serial(int serial) {
 420                 telemetry_state.states.remove((Integer) serial);
 421                 AltosPreferences.remove_state(serial);
 422                 send_to_clients();
 423         }
 424
 425         private void start_altos_bluetooth(DeviceAddress address, boolean pause) {
 426                 if (bluetooth_adapter == null || !bluetooth_adapter.isEnabled())
 427                         return;
 428
 429                 disconnect(false);
 430
 431                 // Get the BluetoothDevice object
 432                 BluetoothDevice device = bluetooth_adapter.getRemoteDevice(address.address);
 433
 434                 this.address = address;
 435                 AltosDebug.debug("start_altos_bluetooth(): Connecting to %s (%s)", device.getName(), device.getAddress());
 436                 altos_link = new AltosBluetooth(device, handler, pause);
 437                 telemetry_state.connect = TelemetryState.CONNECT_CONNECTING;
 438                 telemetry_state.address = address;
 439                 send_to_clients();
 440         }
 441
 442         private void start_idle_monitor() {
 443                 if (altos_link != null && idle_monitor == null) {
 444                         telemetry_stop();
 445                         idle_monitor = new AltosIdleMonitor(this, altos_link, true, false);
 446                         idle_monitor.set_callsign(AltosPreferences.callsign());
 447                         idle_monitor.start();
 448                         send_idle_mode_to_clients();
 449                 }
 450         }
 451
 452         private void stop_idle_monitor() {
 453                 if (idle_monitor != null) {
 454                         try {
 455                                 idle_monitor.abort();
 456                         } catch (InterruptedException ie) {
 457                         }
 458                         idle_monitor = null;
 459                         telemetry_start();
 460                         send_idle_mode_to_clients();
 461                 }
 462         }
 463
 464         private void reboot_remote() {
 465                 if (altos_link != null) {
 466                         stop_idle_monitor();
 467                         try {
 468                                 altos_link.start_remote();
 469                                 altos_link.printf("r eboot\n");
 470                                 altos_link.flush_output();
 471                         } catch (TimeoutException te) {
 472                         } catch (InterruptedException ie) {
 473                         } finally {
 474                                 try {
 475                                         altos_link.stop_remote();
 476                                 } catch (InterruptedException ie) {
 477                                 }
 478                         }
 479                 }
 480         }
 481
 482         private void ensure_ignite() {
 483                 if (ignite == null)
 484                         ignite = new AltosIgnite(altos_link, true, false);
 485         }
 486
 487         private synchronized void igniter_query(Messenger client) {
 488                 ensure_ignite();
 489                 HashMap<String,Integer> status_map = null;
 490                 ignite_running = true;
 491                 try {
 492                         stop_idle_monitor();
 493                         try {
 494                                 status_map = ignite.status();
 495                         } catch (InterruptedException ie) {
 496                                 AltosDebug.debug("ignite.status interrupted");
 497                         } catch (TimeoutException te) {
 498                                 AltosDebug.debug("ignite.status timeout");
 499                         }
 500                 } finally {
 501                         ignite_running = false;
 502                 }
 503                 Message m = Message.obtain(null, AltosDroid.MSG_IGNITER_STATUS, status_map);
 504                 try {
 505                         client.send(m);
 506                 } catch (RemoteException e) {
 507                 }
 508         }
 509
 510         private synchronized void igniter_fire(String igniter) {
 511                 ensure_ignite();
 512                 ignite_running = true;
 513                 stop_idle_monitor();
 514                 try {
 515                         ignite.fire(igniter);
 516                 } catch (InterruptedException ie) {
 517                 } finally {
 518                         ignite_running = false;
 519                 }
 520         }
 521
 522         // Timer for receiver battery voltage monitoring
 523         Timer receiver_voltage_timer;
 524
 525         private void update_receiver_voltage() {
 526                 if (altos_link != null && idle_monitor == null && !ignite_running) {
 527                         try {
 528                                 double  voltage = altos_link.monitor_battery();
 529                                 telemetry_state.receiver_battery = voltage;
 530                                 send_to_clients();
 531                         } catch (InterruptedException ie) {
 532                         }
 533                 }
 534         }
 535
 536         private void stop_receiver_voltage_timer() {
 537                 if (receiver_voltage_timer != null) {
 538                         receiver_voltage_timer.cancel();
 539                         receiver_voltage_timer.purge();
 540                         receiver_voltage_timer = null;
 541                 }
 542         }
 543
 544         private void start_receiver_voltage_timer() {
 545                 if (receiver_voltage_timer == null && altos_link.has_monitor_battery()) {
 546                         receiver_voltage_timer = new Timer();
 547                         receiver_voltage_timer.scheduleAtFixedRate(new TimerTask() { public void run() {update_receiver_voltage();}}, 1000L, 10000L);
 548                 }
 549         }
 550
 551         private void connected() throws InterruptedException {
 552                 AltosDebug.debug("connected top");
 553                 AltosDebug.check_ui("connected\n");
 554                 try {
 555                         if (altos_link == null)
 556                                 throw new InterruptedException("no bluetooth");
 557                         telemetry_state.config = altos_link.config_data();
 558                         altos_link.set_radio_frequency(telemetry_state.frequency);
 559                         altos_link.set_telemetry_rate(telemetry_state.telemetry_rate);
 560                 } catch (TimeoutException e) {
 561                         // If this timed out, then we really want to retry it, but
 562                         // probably safer to just retry the connection from scratch.
 563                         AltosDebug.debug("connected timeout");
 564                         if (address != null) {
 565                                 AltosDebug.debug("connected timeout, retrying");
 566                                 start_altos_bluetooth(address, true);
 567                         } else {
 568                                 handler.obtainMessage(MSG_CONNECT_FAILED).sendToTarget();
 569                                 disconnect(true);
 570                         }
 571                         return;
 572                 }
 573
 574                 AltosDebug.debug("connected bluetooth configured");
 575                 telemetry_state.connect = TelemetryState.CONNECT_CONNECTED;
 576                 telemetry_state.address = address;
 577
 578                 telemetry_start();
 579
 580                 AltosDebug.debug("connected TelemetryReader started");
 581
 582                 telemetry_logger = new TelemetryLogger(this, altos_link);
 583
 584                 start_receiver_voltage_timer();
 585
 586                 AltosDebug.debug("Notify UI of connection");
 587
 588                 send_to_clients();
 589         }
 590
 591
 592         @Override
 593         public void onCreate() {
 594
 595                 AltosDebug.init(this);
 596
 597                 // Initialise preferences
 598                 AltosDroidPreferences.init(this);
 599
 600                 // Get local Bluetooth adapter
 601                 bluetooth_adapter = BluetoothAdapter.getDefaultAdapter();
 602
 603                 telemetry_state = new TelemetryState();
 604
 605                 // Create a reference to the NotificationManager so that we can update our notifcation text later
 606                 //mNM = (NotificationManager)getSystemService(NOTIFICATION_SERVICE);
 607
 608                 telemetry_state.connect = TelemetryState.CONNECT_DISCONNECTED;
 609                 telemetry_state.address = null;
 610
 611                 /* Pull the saved state information out of the preferences database
 612                  */
 613                 ArrayList<Integer> serials = AltosPreferences.list_states();
 614
 615                 telemetry_state.latest_serial = AltosPreferences.latest_state();
 616
 617                 AltosDebug.debug("latest serial %d\n", telemetry_state.latest_serial);
 618
 619                 for (int serial : serials) {
 620                         AltosState saved_state = AltosPreferences.state(serial);
 621                         if (saved_state != null) {
 622                                 if (telemetry_state.latest_serial == 0)
 623                                         telemetry_state.latest_serial = serial;
 624
 625                                 AltosDebug.debug("recovered old state serial %d flight %d",
 626                                                  serial,
 627                                                  saved_state.flight);
 628                                 if (saved_state.gps != null)
 629                                         AltosDebug.debug("\tposition %f,%f",
 630                                                          saved_state.gps.lat,
 631                                                          saved_state.gps.lon);
 632                                 telemetry_state.states.put(serial, saved_state);
 633                         } else {
 634                                 AltosDebug.debug("Failed to recover state for %d", serial);
 635                                 AltosPreferences.remove_state(serial);
 636                         }
 637                 }
 638         }
 639
 640         @Override
 641         public int onStartCommand(Intent intent, int flags, int startId) {
 642                 AltosDebug.debug("Received start id %d: %s", startId, intent);
 643
 644                 CharSequence text = getText(R.string.telemetry_service_started);
 645
 646                 // Create notification to be displayed while the service runs
 647                 Notification notification = new Notification(R.drawable.am_status_c, text, 0);
 648
 649                 // The PendingIntent to launch our activity if the user selects this notification
 650                 PendingIntent contentIntent = PendingIntent.getActivity(this, 0,
 651                                 new Intent(this, AltosDroid.class), 0);
 652
 653                 // Set the info for the views that show in the notification panel.
 654                 notification.setLatestEventInfo(this, getText(R.string.telemetry_service_label), text, contentIntent);
 655
 656                 // Set the notification to be in the "Ongoing" section.
 657                 notification.flags |= Notification.FLAG_ONGOING_EVENT;
 658
 659                 // Move us into the foreground.
 660                 startForeground(NOTIFICATION, notification);
 661
 662                 /* Start bluetooth if we don't have a connection already */
 663                 if (intent != null &&
 664                     (telemetry_state.connect == TelemetryState.CONNECT_NONE ||
 665                      telemetry_state.connect == TelemetryState.CONNECT_DISCONNECTED))
 666                 {
 667                         String  action = intent.getAction();
 668
 669                         if (action.equals(AltosDroid.ACTION_BLUETOOTH)) {
 670                                 DeviceAddress address = AltosDroidPreferences.active_device();
 671                                 if (address != null && !address.address.startsWith("USB"))
 672                                         start_altos_bluetooth(address, false);
 673                         }
 674                 }
 675
 676                 // We want this service to continue running until it is explicitly
 677                 // stopped, so return sticky.
 678                 return START_STICKY;
 679         }
 680
 681         @Override
 682         public void onDestroy() {
 683
 684                 // Stop the bluetooth Comms threads
 685                 disconnect(true);
 686
 687                 // Demote us from the foreground, and cancel the persistent notification.
 688                 stopForeground(true);
 689
 690                 // Tell the user we stopped.
 691                 Toast.makeText(this, R.string.telemetry_service_stopped, Toast.LENGTH_SHORT).show();
 692         }
 693
 694         @Override
 695         public IBinder onBind(Intent intent) {
 696                 return messenger.getBinder();
 697         }
 698
 699         /* AltosIdleMonitorListener */
 700         public void update(AltosState state, AltosListenerState listener_state) {
 701                 telemetry_state.states.put(state.serial, state);
 702                 telemetry_state.receiver_battery = listener_state.battery;
 703                 send_to_clients();
 704         }
 705
 706         public void failed() {
 707         }
 708
 709         public void error(String reason) {
 710                 stop_idle_monitor();
 711         }
 712 }