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接收數據我有以下特點(如何使用Node.js和Bleno庫)咂舌:我的BLE裝置沒有從Android的
PrinterCharacteristic.prototype.onWriteRequest = function(data, offset, withoutResponse, callback) {
this._value = data
console.log('onWriteRequest working with "'+ this._value + '"')
}
另外,我有我的Android設備應該與設備綁定併發送數據給它。
這裏是我的Android代碼:
BluetoothGatt mBluetoothGatt = device.connectGatt(getActivity(), false, new BluetoothGattCallback() {
@Override
public void onConnectionStateChange(BluetoothGatt gatt, int status, int newState) {
super.onConnectionStateChange(gatt, status, newState);
if (status == BluetoothGatt.GATT_SUCCESS) {
Log.d("BLE", "start discover");
gatt.discoverServices();
}
}
@Override
public void onServicesDiscovered(BluetoothGatt gatt, int status) {
Log.d("BLE", "onServicesDiscovered");
if (status == BluetoothGatt.GATT_SUCCESS) {
BluetoothGattService mService = gatt.getServices().get(0);
for (BluetoothGattCharacteristic bgc : mService.getCharacteristics()) {
Log.d("BLE", "characteristic " + bgc.getUuid() + " " + bgc.toString());
bgc.setValue("Hello World");
Log.d("BLE", "writing characteristc");
gatt.writeCharacteristic(bgc);
}
} else {
Log.d("BLE", "onServicesDiscovered error");
}
}
});
這裏是我的日誌:
09-16 13:03:46.769 18585-18585/us.inevent.apps.whiteLabel D/BluetoothGatt: connect() - device: B8:27:EB:98:BE:9D, auto: false
09-16 13:03:46.769 18585-18585/us.inevent.apps.whiteLabel D/BluetoothGatt: registerApp()
09-16 13:03:46.770 18585-18585/us.inevent.apps.whiteLabel D/BluetoothGatt: registerApp() - UUID=9a602983-99db-45fd-a3a3-2eb3ed72989a
09-16 13:03:46.772 18585-18987/us.inevent.apps.whiteLabel D/BluetoothGatt: onClientRegistered() - status=0 clientIf=6
09-16 13:03:47.192 18585-18602/us.inevent.apps.whiteLabel D/BluetoothGatt: onClientConnectionState() - status=0 clientIf=6 device=B8:27:EB:98:BE:9D
09-16 13:03:47.193 18585-18602/us.inevent.apps.whiteLabel D/BLE: start discover
09-16 13:03:47.193 18585-18602/us.inevent.apps.whiteLabel D/BluetoothGatt: discoverServices() - device: B8:27:EB:98:BE:9D
09-16 13:03:47.249 18585-18601/us.inevent.apps.whiteLabel D/BluetoothGatt: onSearchComplete() = Device=B8:27:EB:98:BE:9D Status=0
09-16 13:03:47.249 18585-18601/us.inevent.apps.whiteLabel D/BLE: onServicesDiscovered
09-16 13:03:47.250 18585-18601/us.inevent.apps.whiteLabel D/BLE: characteristic 00002a00-0000-1000-8000-00805f9b34fb [email protected]
09-16 13:03:47.250 18585-18601/us.inevent.apps.whiteLabel D/BLE: writing characteristc
09-16 13:03:47.250 18585-18601/us.inevent.apps.whiteLabel D/BLE: characteristic 00002a01-0000-1000-8000-00805f9b34fb [email protected]
09-16 13:03:47.250 18585-18601/us.inevent.apps.whiteLabel D/BLE: writing characteristc
09-16 13:03:47.533 18585-18585/us.inevent.apps.whiteLabel D/BluetoothAdapter: stopLeScan()
它發現兩個特徵(如預期,WRITE和NOTIFY),並試圖將數據發送到每個他們,但我的樹莓沒有收到任何數據。
如果我使用nRF Connect
應用程序,它按預期工作。
我在做什麼錯?我不確定我是否確切瞭解BLE的工作原理。
謝謝。