Everything About Bluetooth (淺談藍牙 4.0) - Central 篇

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EVERYTHING ABOUT BLUETOOTH Johnny Sung

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https://fb.com/j796160836 Johnny Sung Mobile devices Developer https://plus.google.com/+JohnnySung http://about.me/j796160836

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MessageHorn https://play.google.com/store/apps/details?id=com.JohnnyWorks.messagehorn https://itunes.apple.com/tw/app/messagehorn/id994783068 iOS Server Android Client iOS Server Android Client

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#-6&5005)➝稲

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http://www.redicecreations.com/article.php?id=31630 ⚆私儘⚸띋涸㕜桬ㆁ䬘晋♧⚆ )BSBME#M¤UBOE(PSNTFO  罜➮涸そ㶶#M¤UBOE湬缺㽠僽չ话暆պ CM¤话UBOE暆〢⻍姘铃涸薊铃⻋隶넓歋)BHBMMㄤ#KBSLBO涸穉ざ⛳㽠僽)BSBME#M¤UBOE涸껷㶶嫢չ)#պ涸ざ㻨 http://www.ettoday.net/dalemon/post/3250

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2.0 2.0 + 4.0 Dual Mode 4.0 Bluetooth SMART READY Bluetooth Bluetooth SMART

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#-&嚌䙂

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Bluetooth low energy Protocol Stack

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• Peripheral ヰ鼹酤縨 • Central • Broadcaster • Observer GAP Roles

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Peripheral Central

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Peripheral Central

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Peripheral Central

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GATT

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• Service • Characteristic • Data • Descriptor GATT

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• Heart Rate Service • Heart Rate Measurement • Data • Descriptor 00002A37-0000-1000-8000-00805F9B34FB GATT Heart Rate Monitor 0000180D-0000-1000-8000-00805F9B34FB Property: Notify

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Property: Indicate • Health Thermometer • Temperature Measurement • Data • Descriptor GATT Health Thermometer 00001809-0000-1000-8000-00805F9B34FB 00002A1C-0000-1000-8000-00805F9B34FB

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• Read • Write • Notify • Indicate Characteristic Properties

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UUID 00002A37-0000-1000-8000-00805F9B34FB 0x2A37 Heart Rate Measurement

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• an indicate operation is identical to a notify operation except that indications are acknowledged, while notifications are not. Notify vs Indicate http://mbientlab.com/blog/bluetooth-low-energy-introduction/

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https://developer.bluetooth.org/gatt/services/Pages/ServiceViewer.aspx? u=org.bluetooth.service.health_thermometer.xml

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Property: Indicate • Health Thermometer • Temperature Measurement • Data • Descriptor GATT Health Thermometer 00001809-0000-1000-8000-00805F9B34FB 00002A1C-0000-1000-8000-00805F9B34FB

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"/%30*%㻜⡲

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• Central • Android 4.3 (API Level 18) • Peripheral • Android 5.0 (API Level 21) • Specific BLE chip Requirement in Android

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CENTRAL

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• Discover • Connect • Explore • Interact Central֥ඹἠᾲ؍ 䵃㼦酤縨鸮䱺䱳程须俲穡圓 ✽⹛

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      Bluetooth⃴ཋ ᄝ"OESPJE.BOJGFTUYNMࡆഈ

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Bluetooth⃴ཋ ⃷ק൞ڎᆦჱ#-& getPackageManager().hasSystemFeature(PackageManager.FEATURE_BLUETOOTH_LE) @Override  public void onActivityResult(int requestCode , int resultCode, Intent data) {  if (requestCode == REQUEST_ENABLE_BT) {  if (resultCode == Activity.RESULT_OK) {  // Bluetooth has turned on  } else {  // User did not enable Bluetooth or an error occurred  }  }  } Intent enableIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);  startActivityForResult(enableIntent, REQUEST_ENABLE_BT); ေ౰յῘῴ࿩

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Discover ෆ⇨⊬ᇂ BluetoothManager manager = (BluetoothManager) getSystemService(Context.BLUETOOTH_SERVICE);  BluetoothAdapter adapter = manager.getAdapter(); adapter.startLeScan(scanCallback); adapter.stopLeScan(scanCallback); ଦ֞#MVFUPPUI"EBQUFS Ῐ൓ෆ⇨ ᾵ඏෆ⇨ This method was deprecated in API level 21 API level 18

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Discover ෆ⇨⊬ᇂ BluetoothAdapter.LeScanCallback scanCallback =  new BluetoothAdapter.LeScanCallback() {  @Override  public void onLeScan(final BluetoothDevice device , final int rssi , byte[] scanRecord) {  addDevice(device, rssi);  // Add device to list  }  }; ෆ⇨֥$BMMCBDL This method was deprecated in API level 21 API level 18

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scanner.stopScan(scanCallback); scanner.startScan(filters, settings, scanCallback); Ῐ൓ෆ⇨ ᾵ඏෆ⇨ Discover ෆ⇨⊬ᇂ ڿႨ#MVFUPPUI-F4DBOOFS API level 21 BluetoothManager manager = (BluetoothManager) getSystemService(Context.BLUETOOTH_SERVICE);  BluetoothAdapter adapter = manager.getAdapter(); BluetoothLeScanner scanner = adapter.getBluetoothLeScanner(); // Setting ScanFilter and ScanSettings

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Discover ෆ⇨⊬ᇂ ArrayList filters = new ArrayList<>();  ScanFilter.Builder fb = new ScanFilter.Builder();  fb.setServiceUuid(new ParcelUuid(UUID.fromString("...")));  filters.add(fb.build());   ScanSettings.Builder sb = new ScanSettings.Builder();  ScanSettings settings = sb.build(); ෆ⇨⇢⇊ API level 21

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Discover ෆ⇨⊬ᇂ ෆ⇨⇢⇊ • ScanFilter • ServiceUuid • ServiceData • DeviceAddress • DeviceName • ManufacturerData API level 21

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Discover ෆ⇨⊬ᇂ ෆ⇨⇢⇊ • ScanSettings • CallbackType (All matches / First match / Match lost) • MatchMode • NumOfMatches • ScanMode (Low latency / Balanced / Low power) API level 21

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ScanCallback scanCallback = new ScanCallback() {  @Override  public void onScanResult(int callbackType , ScanResult result) {  if (callbackType == ScanSettings.CALLBACK_TYPE_ALL_MATCHES) {  // Add device to list  }  }    @Override  public void onScanFailed(int errorCode) {  Log.e("Scan Failed", "Error Code: " + errorCode);  } @Override  public void onBatchScanResults(List results) { }  }; Discover ෆ⇨⊬ᇂ ෆ⇨$BMMCBDL API level 21

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Discover ෆ⇨⊬ᇂ ਙԛෆ⇨֥֞⊬ᇂ

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Connect ’ࢤ⊬ᇂ ’ࢤ⊬ᇂ String deviceAddress = "0A:0B:0C:0D:0F:10";  BluetoothDevice device = BluetoothAdapter.getDefaultAdapter().getRemoteDevice(address); BluetoothGatt mBluetoothGatt = device.connectGatt(this, false, mGattCallback); API level 18

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private final BluetoothGattCallback mGattCallback = new BluetoothGattCallback() {  @Override  public void onConnectionStateChange(BluetoothGatt gatt , int status, int newState) {  switch (newState) {  case BluetoothProfile.STATE_CONNECTED: // do discoverServices  break;  case BluetoothProfile.STATE_DISCONNECTED:  break;    case BluetoothProfile.STATE_CONNECTING:  case BluetoothProfile.STATE_DISCONNECTING:  break;  }  }    // More ...  }; Connect ’ࢤ⊬ᇂ (BUU$BMMCBDL API level 18

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Explore ฐ෬⊷ਘ᾵ἧ ෆ⇨4FSWJDFT API level 18 mBluetoothGatt.discoverServices(); private final BluetoothGattCallback mGattCallback = new BluetoothGattCallback() {  // ... Continued   @Override  public void onServicesDiscovered(BluetoothGatt gatt , int status) {  if (status == BluetoothGatt.GATT_SUCCESS) {  // Do Something  }  } // More ...  }; (BUU$BMMCBDL ⇟

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Explore ฐ෬⊷ਘ᾵ἧ ౼֤4FSWJDFT API level 18 BluetoothGattService gattService = mBluetoothGatt.getService(UUID.fromString("..."));  BluetoothGattCharacteristic characteristic = gattService.getCharacteristic(UUID.fromString("..."));  ౼֤$IBSBDUFSJTUJD

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Explore ฐ෬᾵ἧ ਙԛ෮Ⴕ֥4FSWJDFT

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Explore ฐ෬᾵ἧ ਙԛ෮Ⴕ֥$IBSBDUFSJTUJDT

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Interact ޺ọ ồ౼$IBSBDUFSJTUJD֥ᆴ API level 18 byte[] bytes = characteristic.getValue(); private final BluetoothGattCallback mGattCallback = new BluetoothGattCallback() { // ... Continued  @Override  public void onCharacteristicRead(BluetoothGatt gatt,  BluetoothGattCharacteristic characteristic, int status) {  if (status == BluetoothGatt.GATT_SUCCESS) {  // Do Something  }  } // More ...  }; (BUU$BMMCBDL ⇟

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Interact ޺ọ ồ౼$IBSBDUFSJTUJD֥ᆴ API level 18 byte[] bytes = characteristic.getValue(); float floatValue = characteristic.getFloatValue( BluetoothGattCharacteristic.FORMAT_FLOAT, 0);   int intValue = characteristic.getIntValue( BluetoothGattCharacteristic.FORMAT_SINT8, 0);   int uintValue = characteristic.getIntValue( BluetoothGattCharacteristic.FORMAT_UINT8, 0);   String stringValue = characteristic.getStringValue(0); ὕॖၛ≾∄ồ౼ mBluetoothGatt.setCharacteristicNotification(characteristic, true);  UUID CCCD = UUID.fromString("00002902-0000-1000-8000-00805f9b34fb");  BluetoothGattDescriptor descriptor = characteristic.getDescriptor(CCCD);  descriptor.setValue(BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE);  mBluetoothGatt.writeDescriptor(descriptor);

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Interact ޺ọ 䩏⤳$IBSBDUFSJTUJD֥/PUGJDBUJPO۷ྍ API level 18 mBluetoothGatt.setCharacteristicNotification(characteristic, true);  UUID CCCD = UUID.fromString("00002902-0000-1000-8000-00805f9b34fb");  BluetoothGattDescriptor descriptor = characteristic.getDescriptor(CCCD);  descriptor.setValue( BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE);  mBluetoothGatt.writeDescriptor(descriptor); private final BluetoothGattCallback mGattCallback = new BluetoothGattCallback() { // ... Continued  @Override  public void onCharacteristicChanged(BluetoothGatt gatt,  BluetoothGattCharacteristic characteristic) {  // Do Something  }  }; (BUU$BMMCBDL ⇟

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Interact ޺ọ թ౼$IBSBDUFSJTUJDT

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Samples https://github.com/j796160836/nRFSample_uCXpresso-Android nRFSample-Android https://github.com/j796160836/nRFSample_uCXpresso-iOS nRFSample-iOS https://github.com/googlesamples/android-BluetoothLeGatt android-BluetoothLeGatt

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Develop tools https://play.google.com/store/apps/details?id=no.nordicsemi.android.nrftoolbox nRF Toolbox https://itunes.apple.com/tw/app/id557428110 LightBlue Explorer (iOS) https://itunes.apple.com/us/app/id820906058 nRF Toolbox (iOS) https://play.google.com/store/apps/details?id=com.kyriakosalexandrou.bluetoothsupportcheck BLE Central,Peripheral Check https://play.google.com/store/apps/details?id=com.macdom.ble.blescanner BLE Scanner: Read,Write,Notify Andorid

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Develop tools https://itunes.apple.com/tw/app/id557428110 LightBlue Explorer https://itunes.apple.com/us/app/id820906058 nRF Toolbox iOS https://itunes.apple.com/tw/app/lightblue/id639944780?mt=12 Mac LightBlue

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MessageHorn

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MessageHorn for iOS https://itunes.apple.com/tw/app/messagehorn/id994783068

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MessageHorn for Android Wear When messaging Connected to device Device selection Main https://play.google.com/store/apps/details?id=com.JohnnyWorks.messagehorn

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MessageHorn https://play.google.com/store/apps/details?id=com.JohnnyWorks.messagehorn https://itunes.apple.com/tw/app/messagehorn/id994783068 iOS Server Android Client iOS Server Android Client

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AndroidWear⛳〳⟃䖎惐

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Q&A

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• https://developer.bluetooth.org/gatt/services/Pages/ ServicesHome.aspx • https://www.safaribooksonline.com/library/view/getting-started- with/9781491900550/ch04.html • http://gogoprivateryan.blogspot.tw/2014/09/cc2540-bluetooth-low- energy-3.html • http://www.redicecreations.com/article.php?id=31630 • http://mbientlab.com/blog/bluetooth-low-energy-introduction/ References

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