Promisified BLE Client

Introduce Bletia: Promisified BLE Client for Android
potatotips #21 http://connpass.com/event/18732/
Bletia https://github.com/izumin5210/Bletia

Transcript

1. Promisified BLE Client Masayuki IZUMI - @izumin5210 potatotips #21 https://www.flickr.com/photos/dewittkower/4641701143/
2.  Rekimoto Lab. at the University of Tokyo (2008-2015: Akashi-NCT)  Enginner at Wantedly, Inc. (2014.9-2015.2: Dmetlabel, Inc.) 2
3. 2 Ruby JavaScript Android Design pry(main) > izumin.skill_ratio
4. http://konashi.ux-xu.com/ https://github.com/YUKAI/konashi-android-sdk/ https://www.flickr.com/photos/36571434@N03/8524872002
5. ＼ 前回のラブライブ！ ／ kyobashi.dex
6. https://speakerdeck.com/izumin5210/tsurai-ble-on-android
7. Bluetooth GATT GATT Server Service Service
8. Bluetooth GATT GATT Server Service Service Characteristic
9. BLE on Android Central wants data Peripheral has data
10. BLE on Android Central wants data Peripheral has data write value read value
11. Write characteristic value Central wants data Peripheral has data write value
12. Write characteristic value Central wants data Peripheral has data write value BluetoothGatt#writeCharacteristic()
13. Write characteristic value Central wants data Peripheral has data write value BluetoothGatt#writeCharacteristic() (async)
14. Write characteristic value Central wants data Peripheral has data write value BluetoothGatt#writeCharacteristic() BluetoothGattCallback#onCharacteristicWrite() (async)
15. When is the callback registered ? public BluetoothGatt connectGatt ( Context context, boolean autoConnect, BluetoothGattCallback callback )
16. When is the callback registered ? public BluetoothGatt connectGatt ( Context context, boolean autoConnect, BluetoothGattCallback callback ) We can register only 1 instance...
17. Handle callback public void onCharacteristicWrite ( BluetoothGatt gatt, BluetoothGattCharacteristic characteristic, int status) { if (status == BluetoothGatt.GATT_SUCCESS) { // check characteristic instance, handling... } else { // error handling... } }
18. Handle callback public void onCharacteristicWrite ( BluetoothGatt gatt, BluetoothGattCharacteristic characteristic, int status) { if (status == BluetoothGatt.GATT_SUCCESS) { // check characteristic instance, handling... } else { // error handling... } }
19. if BG has promise like api ... gatt.writeCharacteristic(characteristic) .then( // call when the operation successfully ) .fail( // call when the operation failure )
20. Bletia https://github.com/izumin5210/Bletia
21. Download dependencies { compile 'info.izumin.android:bletia:1.2.2' }
22. Instantiate / Connect // Pass application context to constructor. Bletia bletia = new Bletia(context); // BluetoothDevice device bletia.connect(device);
23. Instantiate / Connect bletia.writeCharacteristic(characteristic);
24. Write characteristic bletia.writeCharacteristic(characteristic) .then(new DoneCallback<BluetoothGattCharacteristic>() { @Override public void onDone(BluetoothGattCharacteristic result) { // Call when the request was successfully. } });
25. Write characteristic bletia.writeCharacteristic(characteristic) .then(new DoneCallback<BluetoothGattCharacteristic>() { @Override public void onDone(BluetoothGattCharacteristic result) { // Call when the request was successfully. } });
26. Write characteristic bletia.writeCharacteristic(characteristic) .then(new DoneCallback<BluetoothGattCharacteristic>() { @Override public void onDone(BluetoothGattCharacteristic result) { // Call when the request was successfully. } });
27. Write characteristic bletia.writeCharacteristic(characteristic) .fail(new FailCallback<BletiaException>() { @OVerride public void onFail(BletiaException result) { // Call when the request was failure. } });
28. Write characteristic bletia.writeCharacteristic(characteristic) .fail(new FailCallback<BletiaException>() { @OVerride public void onFail(BletiaException result) { // Call when the request was failure. } });
29. Write characteristic bletia.writeCharacteristic(characteristic) .fail(new FailCallback<BletiaException>() { @OVerride public void onFail(BletiaException result) { // Call when the request was failure. } });
30. Support promisified operations (v1.2.2) * readCharacteristic() / writeCharacteristic() * readDescriptor() / writeDescriptor() * enableNotification() * readRemoteRssi()
31. Conclusion Saiko no Experiense with Promise