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