こわくないBLE / BLE is afraid

第48回 情報科学若手の会 LT資料
Bletia: https://github.com/izumin5210/Bletia

Transcript

1. こわくない BLE （Bluetooth Low Energy） Masayuki IZUMI - @izumin5210 第 48 回情報科学若手の会 https://www.flickr.com/photos/36571434@N03/8524872002
2.  > Masayuki IZUMI a.k.a. @izumin5210 > Rekimoto Lab. at the University of Tokyo > Wantedly, Inc. > Rubyist / Androider / {Java,Type}Scripter
3. 2 Ruby JavaScript Android Design pry(main) > izumin.skill_ratio
4. Outline What is BLE ? BLE on Android 雑談
5. BLE
6. Bluetooth Low Energy
7. BLE とは
8. Bluetooth® Smart is the intelligent, power-friendly version of Bluetooth wireless technology. While the power-efficiency of Bluetooth Smart makes it perfect for devices needing to run off a tiny battery for long periods, the magic of Bluetooth Smart is its ability to work with an application on the smartphone or tablet you already own. Bluetooth Smart makes it easy for developers and OEMs to create solutions that will work with the billions of Bluetooth enabled products already in the market today. - Bluetooth Technology Website
9. せやな
10. BLE とは  Bluetooth 3.0 の次世代規格
11. BLE とは  Bluetooth 3.0 の次世代規格  省電力
12. BLE とは  Bluetooth 3.0 の次世代規格  省電力  後方互換性なし ※ 周波数帯は共通
13. BLE とは  Bluetooth 3.0 の次世代規格  省電力  後方互換性なし ※ 周波数帯は共通  GATT というプロファイルを利用
14. GATT ？
15. Generic Attribute Profile
16. Attribute | Bluetooth GATT Attribute: 最小単位
17. Service | Bluetooth GATT Service 関連する Attribute のあつまり GATT Server Service Service
18. Characteristic | Bluetooth GATT Characteristic データを格納する GATT Server Service Service Characteristic
19. BLE on Android Central wants data Peripheral has data
20. BLE on Android Central wants data Peripheral has data write value read value
21. Write charcteristic | BLE on Android Central wants data Peripheral has data write value
22. Write charcteristic | BLE on Android Central wants data Peripheral has data write value BluetoothGatt#writeCharacteristic()
23. Write charcteristic | BLE on Android Central wants data Peripheral has data write value BluetoothGatt#writeCharacteristic() (async)
24. Write charcteristic | BLE on Android Central wants data Peripheral has data write value BluetoothGatt#writeCharacteristic() BluetoothGattCallback#onCharacteristicWrite() (async)
25. Handle callback public void onCharacteristicWrite ( BluetoothGatt gatt, BluetoothGattCharacteristic characteristic, int status) { if (status == BluetoothGatt.GATT_SUCCESS) { // check characteristic instance, handling... } else { // error handling... } }
26. Handle callback public void onCharacteristicWrite ( BluetoothGatt gatt, BluetoothGattCharacteristic characteristic, int status) { if (status == BluetoothGatt.GATT_SUCCESS) { // check characteristic instance, handling... } else { // error handling... } }
27. When is the callback registered ? class final BluetoothDevice { public BluetoothGatt connectGatt ( Context context, boolean autoConnect, BluetoothGattCallback callback ) { // ... } }
28. When is the callback registered ? class final BluetoothDevice { public BluetoothGatt connectGatt ( Context context, boolean autoConnect, BluetoothGattCallback callback ) { // ... } } We can register only 1 instance...
29. はい
30. つらい
31. Bletia https://github.com/izumin5210/Bletia Android で BLE つかいやすくするやつ
32. bletia.writeCharacteristic(characteristic) .then( // call when the operation successfully ) .fail( // call when the operation failure )
33. bletia.writeCharacteristic(characteristic) .then( // call when the operation successfully ) .fail( // call when the operation failure )
34. ちなみに… CI （on Docker Container with Wercker） CD (with Wercker) みたいな一人 DevOps してます
35. ちなみに… Flux（JS քで流行ってるアーキテクチャ） Promise（JS） みたいな 異文化交流（？） 意識してます
36. ちなみに… Bletia: ラン科 花言葉 : あなたを忘れない
37. ちなみに… Bletia: ラン科 花言葉 : あなたを忘れない 特徴 : Promise ベースの API
38. Conclusion  BLE: GATT というプロファイルを利用  Characteristic を読み書きする  Android で BLE つらい  Bletia つかえばつらくない
39. Bletia https://github.com/izumin5210/Bletia つかってみてね