I think I figured it out. Instead of: sudo hciconfig hci0 up sudo hcitool -i hci0 cmd 0x08 0x0008 1e 02 01 1a 1a ff 4c 00 02 15 e2 c5 6d b5 df fb 48 d2 b0 60 d0 f5 a7 10 96 e0 00 00 00 00 c5 00 00 00 00 00 … Read more
I’ve already gone through this for at least one week having this same issue. I’ve already asked a question here and I’ve already answered on my own. The main problem is an Android BUG issue. It’s sending a non permitted command on a fixed L2CAP channnel. But when Android is communicating with normal peripheral BLE … Read more
YES This is possible on Android 5+, and you can find open-source code for transmitting as a beacon in the Android Beacon Library. There is also a full-featured version of a beacon transmitter in the Beacon Scope app in the Google Play Store. Here’s an example of transmitting iBeacon with the Android Beacon Library: Beacon … Read more
I think this might be an XY problem. What I have understood is that you want to send a button press from the micro:bit to the RPi via Bluetooth Low Energy (BLE). If that is the case, then there is a more efficient way to do this. In the Bluetooth Profile for the micro:bit there … Read more
You can use C# APIs in C# Desktop applications! I have a sample here in GitHub. In general, to get access to the C# APIS, add two references to your project: C:\Program Files (x86)\Windows Kits\10\UnionMetadata\Windows.winmd C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETCore\v4.5\System.Runtime.WindowsRuntime.dll Note that the #2 version depends on the version of .NET that you’re using. Background tasks … Read more
The documentation lacks information. However you can read the source code to find out the rules, which (currently) are the following: For each BluetoothGatt object, you can only have one outstanding request at a time, including requestMtu, readCharacteristic, writeCharacteristic, readDescriptor, writeDescriptor and executeReliableWrite. So if you issue a read request you need to wait for … Read more
CBPeripheral’s identifier property will serve your purpose, available from a still-unconnected device in CBCentralManager’s didDiscoverPeripheral delegate method: – (void)centralManager:(CBCentralManager *)central didDiscoverPeripheral:(CBPeripheral *)peripheral advertisementData:(NSDictionary *)advertisementData RSSI:(NSNumber *)RSSI CBPeripheral *peripheral … NSUUID* serverId = [peripheral identifier]; I have a half dozen LE devices I’m experimenting with, including multiple sets of identical devices. I just confirmed that across … Read more
“Direct connect” is the opposite to “auto connect”, so if you set the autoConnect parameter to false you get a “direct connect”. Note that doing a “mBluetoothGatt.connect()” will also use auto connect. Beware of https://code.google.com/p/android/issues/detail?id=69834 which is a bug affecting older versions of Android which might make your auto connections to be direct connections instead. … Read more
So, here’s all I found after reading blogs, threads, documentations, SO answers etc. regarding Android’s bluetooth discovery. Thought this might be useful to post my findings here. So before someone starts reading, I want to clarify that, I could not find any way to detect a bluetooth device nearby which is turned on but not … Read more
I have solved this problem. public class BluetoothLeService extends Service { private static final UUID Battery_Service_UUID = UUID.fromString(“0000180F-0000-1000-8000-00805f9b34fb”); private static final UUID Battery_Level_UUID = UUID.fromString(“00002a19-0000-1000-8000-00805f9b34fb”); public void onCharacteristicRead(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic, int status) { if(status == BluetoothGatt.GATT_SUCCESS) { broadcastUpdate(ACTION_DATA_AVAILABLE, characteristic); } } private void broadcastUpdate(final String action, final BluetoothGattCharacteristic characteristic) { final Intent intent = … Read more