public static AndroidScanMode ToNative(this ScanMode scanMode)
{
if (Build.VERSION.SdkInt < BuildVersionCodes.Lollipop)
{
throw new InvalidOperationException("Scan modes are not implemented in API lvl < 21.");
}
switch (scanMode)
{
case ScanMode.Passive:
if (Build.VERSION.SdkInt < BuildVersionCodes.M)
{
Trace.Message("Scanmode Passive is not supported on API lvl < 23. Falling back to LowPower.");
return(AndroidScanMode.LowPower);
}
return(AndroidScanMode.Opportunistic);
case ScanMode.LowPower:
return(AndroidScanMode.LowPower);
case ScanMode.Balanced:
return(AndroidScanMode.Balanced);
case ScanMode.LowLatency:
return(AndroidScanMode.LowLatency);
default:
throw new ArgumentOutOfRangeException(nameof(scanMode), scanMode, null);
}
}
protected Task StopUpdatesNativeAsync()
{
var exception = new Exception($"Device {Service.Device.Id} disconnected while stopping updates for characteristic with {Id}.");
_parentDevice.UpdatedCharacterteristicValue -= UpdatedNotify;
return(TaskBuilder.FromEvent <bool, EventHandler <CBCharacteristicEventArgs>, EventHandler <CBPeripheralErrorEventArgs> >(
execute: () =>
{
if (_parentDevice.State != CBPeripheralState.Connected)
{
throw exception;
}
_parentDevice.SetNotifyValue(false, NativeCharacteristic);
},
getCompleteHandler: (complete, reject) => (sender, args) =>
{
if (args.Characteristic.UUID != NativeCharacteristic.UUID)
{
return;
}
if (args.Error != null)
{
reject(new Exception($"Stop Notifications: Error {args.Error.Description}"));
}
else
{
Trace.Message($"StopUpdates IsNotifying: {args.Characteristic.IsNotifying}");
complete(args.Characteristic.IsNotifying);
}
},
subscribeComplete: handler => _parentDevice.UpdatedNotificationState += handler,
unsubscribeComplete: handler => _parentDevice.UpdatedNotificationState -= handler,
getRejectHandler: reject => ((sender, args) =>
{
if (args.Peripheral.Identifier == _parentDevice.Identifier)
{
reject(exception);
}
}),
subscribeReject: handler => _bleCentralManagerDelegate.DisconnectedPeripheral += handler,
unsubscribeReject: handler => _bleCentralManagerDelegate.DisconnectedPeripheral -= handler));
}
protected Task StartScanningForDevicesNativeAsync(Guid[] serviceUuids, bool allowDuplicatesKey, CancellationToken scanCancellationToken)
{
_serviceUuids = serviceUuids;
_bleWatcher = new BluetoothLEAdvertisementWatcher {
ScanningMode = ScanMode.ToNative()
};
Trace.Message("Starting a scan for devices.");
_foundIds = new List <Guid>();
_bleWatcher.Received -= DeviceFoundAsync;
_bleWatcher.Received += DeviceFoundAsync;
_bleWatcher.Start();
return(Task.FromResult(true));
}
protected Task <byte[]> ReadNativeAsync()
{
var exception = new Exception($"Device '{Service.Device.Id}' disconnected while reading characteristic with {Id}.");
return(TaskBuilder.FromEvent <byte[], EventHandler <CBCharacteristicEventArgs>, EventHandler <CBPeripheralErrorEventArgs> >(
execute: () =>
{
if (_parentDevice.State != CBPeripheralState.Connected)
{
throw exception;
}
_parentDevice.ReadValue(NativeCharacteristic);
},
getCompleteHandler: (complete, reject) => (sender, args) =>
{
if (args.Characteristic.UUID != NativeCharacteristic.UUID)
{
return;
}
if (args.Error != null)
{
reject(new CharacteristicReadException($"Read async error: {args.Error.Description}"));
}
else
{
Trace.Message($"Read characterteristic value: {Value?.ToHexString()}");
complete(Value);
}
},
subscribeComplete: handler => _parentDevice.UpdatedCharacterteristicValue += handler,
unsubscribeComplete: handler => _parentDevice.UpdatedCharacterteristicValue -= handler,
getRejectHandler: reject => ((sender, args) =>
{
if (args.Peripheral.Identifier == _parentDevice.Identifier)
{
reject(exception);
}
}),
subscribeReject: handler => _bleCentralManagerDelegate.DisconnectedPeripheral += handler,
unsubscribeReject: handler => _bleCentralManagerDelegate.DisconnectedPeripheral -= handler));
}
public void ClearServices()
{
this.CancelEverythingAndReInitialize();
lock (KnownServices)
{
foreach (var service in KnownServices)
{
try
{
service.Dispose();
}
catch (Exception ex)
{
Trace.Message("Exception while cleanup of service: {0}", ex.Message);
}
}
KnownServices.Clear();
}
}
protected Task ConnectToDeviceNativeAsync(Device device, ConnectParameters connectParameters, CancellationToken cancellationToken)
{
if (connectParameters.AutoConnect)
{
Trace.Message("Warning: Autoconnect is not supported in iOS");
}
_deviceOperationRegistry[device.Id.ToString()] = device;
_centralManager.ConnectPeripheral(device.NativeDevice as CBPeripheral,
new PeripheralConnectionOptions());
// this is dirty: We should not assume, AdapterBase is doing the cleanup for us...
// move ConnectToDeviceAsync() code to native implementations.
cancellationToken.Register(() =>
{
Trace.Message("Canceling the connect attempt");
_centralManager.CancelPeripheralConnection(device.NativeDevice as CBPeripheral);
});
return(Task.FromResult(true));
}
protected async Task StartScanningForDevicesNativeAsync(Guid[] serviceUuids, bool allowDuplicatesKey, CancellationToken scanCancellationToken)
{
// Wait for the PoweredOn state
await WaitForState(CBCentralManagerState.PoweredOn, scanCancellationToken).ConfigureAwait(false);
if (scanCancellationToken.IsCancellationRequested)
{
throw new TaskCanceledException("StartScanningForDevicesNativeAsync cancelled");
}
Trace.Message("Adapter: Starting a scan for devices.");
CBUUID[] serviceCbuuids = null;
if (serviceUuids != null && serviceUuids.Any())
{
serviceCbuuids = serviceUuids.Select(u => CBUUID.FromString(u.ToString())).ToArray();
Trace.Message("Adapter: Scanning for " + serviceCbuuids.First());
}
_centralManager.ScanForPeripherals(serviceCbuuids, new PeripheralScanningOptions {
AllowDuplicatesKey = allowDuplicatesKey
});
}
private void OnNameUpdated(object sender, System.EventArgs e)
{
Name = ((CBPeripheral)sender).Name;
Trace.Message("Device changed name: {0}", Name);
}
private bool UpdateConnectionIntervalNative(ConnectionInterval interval)
{
Trace.Message("Cannot update connection inteval on iOS.");
return(false);
}
private async Task <int> RequestMtuNativeAsync(int requestValue)
{
Trace.Message($"Request MTU is not supported on iOS.");
return(await Task.FromResult((int)NativeDevice.GetMaximumWriteValueLength(CBCharacteristicWriteType.WithoutResponse)));
}
public static List <AdvertisementRecord> ParseAdvertismentData(NSDictionary advertisementData)
{
var records = new List <AdvertisementRecord>();
/*var keys = new List<NSString>
* {
* CBAdvertisement.DataLocalNameKey,
* CBAdvertisement.DataManufacturerDataKey,
* CBAdvertisement.DataOverflowServiceUUIDsKey, //ToDo ??which one is this according to ble spec
* CBAdvertisement.DataServiceDataKey,
* CBAdvertisement.DataServiceUUIDsKey,
* CBAdvertisement.DataSolicitedServiceUUIDsKey,
* CBAdvertisement.DataTxPowerLevelKey
* };*/
foreach (var o in advertisementData.Keys)
{
var key = (NSString)o;
if (key == CBAdvertisement.DataLocalNameKey)
{
records.Add(new AdvertisementRecord(AdvertisementRecordType.CompleteLocalName,
NSData.FromString(advertisementData.ObjectForKey(key) as NSString).ToArray()));
}
else if (key == CBAdvertisement.DataManufacturerDataKey)
{
var arr = ((NSData)advertisementData.ObjectForKey(key)).ToArray();
records.Add(new AdvertisementRecord(AdvertisementRecordType.ManufacturerSpecificData, arr));
}
else if (key == CBAdvertisement.DataServiceUUIDsKey || key == CBAdvertisement.DataOverflowServiceUUIDsKey)
{
var array = (NSArray)advertisementData.ObjectForKey(key);
for (nuint i = 0; i < array.Count; i++)
{
var cbuuid = array.GetItem <CBUUID>(i);
switch (cbuuid.Data.Length)
{
case 16:
// 128-bit UUID
records.Add(new AdvertisementRecord(AdvertisementRecordType.UuidsComplete128Bit, cbuuid.Data.ToArray()));
break;
case 8:
// 32-bit UUID
records.Add(new AdvertisementRecord(AdvertisementRecordType.UuidCom32Bit, cbuuid.Data.ToArray()));
break;
case 2:
// 16-bit UUID
records.Add(new AdvertisementRecord(AdvertisementRecordType.UuidsComplete16Bit, cbuuid.Data.ToArray()));
break;
default:
// Invalid data length for UUID
break;
}
}
}
else if (key == CBAdvertisement.DataTxPowerLevelKey)
{
//iOS stores TxPower as NSNumber. Get int value of number and convert it into a signed Byte
//TxPower has a range from -100 to 20 which can fit into a single signed byte (-128 to 127)
sbyte byteValue = Convert.ToSByte(((NSNumber)advertisementData.ObjectForKey(key)).Int32Value);
//add our signed byte to a new byte array and return it (same parsed value as android returns)
byte[] arr = { (byte)byteValue };
records.Add(new AdvertisementRecord(AdvertisementRecordType.TxPowerLevel, arr));
}
else if (key == CBAdvertisement.DataServiceDataKey)
{
//Service data from CoreBluetooth is returned as a key/value dictionary with the key being
//the service uuid (CBUUID) and the value being the NSData (bytes) of the service
//This is where you'll find eddystone and other service specific data
NSDictionary serviceDict = (NSDictionary)advertisementData.ObjectForKey(key);
//There can be multiple services returned in the dictionary, so loop through them
foreach (CBUUID dKey in serviceDict.Keys)
{
//Get the service key in bytes (from NSData)
byte[] keyAsData = dKey.Data.ToArray();
//Service UUID's are read backwards (little endian) according to specs,
//CoreBluetooth returns the service UUIDs as Big Endian
//but to match the raw service data returned from Android we need to reverse it back
//Note haven't tested it yet on 128bit service UUID's, but should work
Array.Reverse(keyAsData);
//The service data under this key can just be turned into an arra
var data = (NSData)serviceDict.ObjectForKey(dKey);
byte[] valueAsData = data.Length > 0 ? data.ToArray() : new byte[0];
//Now we append the key and value data and return that so that our parsing matches the raw
//byte value returned from the Android library (which matches the raw bytes from the device)
byte[] arr = new byte[keyAsData.Length + valueAsData.Length];
Buffer.BlockCopy(keyAsData, 0, arr, 0, keyAsData.Length);
Buffer.BlockCopy(valueAsData, 0, arr, keyAsData.Length, valueAsData.Length);
records.Add(new AdvertisementRecord(AdvertisementRecordType.ServiceData, arr));
}
}
else if (key == CBAdvertisement.IsConnectable)
{
// A Boolean value that indicates whether the advertising event type is connectable.
// The value for this key is an NSNumber object. You can use this value to determine whether a peripheral is connectable at a particular moment.
records.Add(new AdvertisementRecord(AdvertisementRecordType.IsConnectable,
new byte[] { ((NSNumber)advertisementData.ObjectForKey(key)).ByteValue }));
}
else
{
Trace.Message($"Parsing Advertisement: Ignoring Advertisement entry for key {key}, since we don't know how to parse it yet. Maybe you can open a Pull Request and implement it ;)");
}
}
return(records);
}
internal Adapter(CBCentralManager centralManager, IBleCentralManagerDelegate bleCentralManagerDelegate)
{
_centralManager = centralManager;
_bleCentralManagerDelegate = bleCentralManagerDelegate;
_bleCentralManagerDelegate.DiscoveredPeripheral += (sender, e) =>
{
Trace.Message("DiscoveredPeripheral: {0}, Id: {1}", e.Peripheral.Name, e.Peripheral.Identifier);
var name = e.Peripheral.Name;
if (e.AdvertisementData.ContainsKey(CBAdvertisement.DataLocalNameKey))
{
// iOS caches the peripheral name, so it can become stale (if changing)
// keep track of the local name key manually
name = ((NSString)e.AdvertisementData.ValueForKey(CBAdvertisement.DataLocalNameKey)).ToString();
}
var device = new Device(this, e.Peripheral, _bleCentralManagerDelegate, name, e.RSSI.Int32Value,
ParseAdvertismentData(e.AdvertisementData));
HandleDiscoveredDevice(device);
};
_bleCentralManagerDelegate.UpdatedState += (sender, e) =>
{
Trace.Message("UpdatedState: {0}", _centralManager.State);
_stateChanged.Set();
//handle PoweredOff state
//notify subscribers about disconnection
if (_centralManager.State == CBCentralManagerState.PoweredOff)
{
foreach (var device in ConnectedDeviceRegistry.Values.ToList())
{
((Device)device).ClearServices();
HandleDisconnectedDevice(false, device);
}
ConnectedDeviceRegistry.Clear();
}
};
_bleCentralManagerDelegate.ConnectedPeripheral += (sender, e) =>
{
Trace.Message("ConnectedPeripherial: {0}", e.Peripheral.Name);
// when a peripheral gets connected, add that peripheral to our running list of connected peripherals
var guid = ParseDeviceGuid(e.Peripheral).ToString();
Device device;
if (_deviceOperationRegistry.TryGetValue(guid, out device))
{
_deviceOperationRegistry.Remove(guid);
((Device)device).Update(e.Peripheral);
}
else
{
Trace.Message("Device not found in operation registry. Creating a new one.");
device = new Device(this, e.Peripheral, _bleCentralManagerDelegate);
}
ConnectedDeviceRegistry[guid] = device;
HandleConnectedDevice(device);
};
_bleCentralManagerDelegate.DisconnectedPeripheral += (sender, e) =>
{
if (e.Error != null)
{
Trace.Message("Disconnect error {0} {1} {2}", e.Error.Code, e.Error.Description, e.Error.Domain);
}
// when a peripheral disconnects, remove it from our running list.
var id = ParseDeviceGuid(e.Peripheral);
var stringId = id.ToString();
// normal disconnect (requested by user)
var isNormalDisconnect = _deviceOperationRegistry.TryGetValue(stringId, out var foundDevice);
if (isNormalDisconnect)
{
_deviceOperationRegistry.Remove(stringId);
}
// check if it is a peripheral disconnection, which would be treated as normal
if (e.Error != null && e.Error.Code == 7 && e.Error.Domain == "CBErrorDomain")
{
isNormalDisconnect = true;
}
// remove from connected devices
if (!ConnectedDeviceRegistry.TryRemove(stringId, out foundDevice))
{
Trace.Message($"Device with id '{stringId}' was not found in the connected device registry. Nothing to remove.");
}
foundDevice = foundDevice ?? new Device(this, e.Peripheral, _bleCentralManagerDelegate);
//make sure all cached services are cleared this will also clear characteristics and descriptors implicitly
((Device)foundDevice).ClearServices();
HandleDisconnectedDevice(isNormalDisconnect, foundDevice);
};
_bleCentralManagerDelegate.FailedToConnectPeripheral +=
(sender, e) =>
{
var id = ParseDeviceGuid(e.Peripheral);
var stringId = id.ToString();
// remove instance from registry
if (_deviceOperationRegistry.TryGetValue(stringId, out var foundDevice))
{
_deviceOperationRegistry.Remove(stringId);
}
foundDevice = foundDevice ?? new Device(this, e.Peripheral, _bleCentralManagerDelegate);
HandleConnectionFail(foundDevice, e.Error.Description);
};
}
private Task <int> RequestMtuNativeAsync(int requestValue)
{
Trace.Message("Request MTU not supported in UWP");
return(Task.FromResult(-1));
}
private bool UpdateConnectionIntervalNative(ConnectionInterval interval)
{
Trace.Message("Update Connection Interval not supported in UWP");
return(false);
}
public override void OnConnectionStateChange(BluetoothGatt gatt, GattStatus status, ProfileState newState)
{
base.OnConnectionStateChange(gatt, status, newState);
if (!gatt.Device.Address.Equals(_device.NativeDevice.Address))
{
Trace.Message($"Gatt callback for device {_device.NativeDevice.Address} was called for device with address {gatt.Device.Address}. This shoud not happen. Please log an issue.");
return;
}
//ToDo ignore just for me
Trace.Message($"References of parent device and gatt callback device equal? {ReferenceEquals(_device.NativeDevice, gatt.Device).ToString().ToUpper()}");
Trace.Message($"OnConnectionStateChange: GattStatus: {status}");
switch (newState)
{
// disconnected
case ProfileState.Disconnected:
// Close GATT regardless, else we can accumulate zombie gatts.
CloseGattInstances(gatt);
// If status == 19, then connection was closed by the peripheral device (clean disconnect), consider this as a DeviceDisconnected
if (_device.IsOperationRequested || (int)status == 19)
{
Trace.Message("Disconnected by user");
//Found so we can remove it
_device.IsOperationRequested = false;
_adapter.ConnectedDeviceRegistry.TryRemove(gatt.Device.Address, out _);
if (status != GattStatus.Success && (int)status != 19)
{
// The above error event handles the case where the error happened during a Connect call, which will close out any waiting asyncs.
// Android > 5.0 uses this switch branch when an error occurs during connect
Trace.Message($"Error while connecting '{_device.Name}'. Not raising disconnect event.");
_adapter.HandleConnectionFail(_device, $"GattCallback error: {status}");
}
else
{
//we already hadled device error so no need th raise disconnect event(happens when device not in range)
_adapter.HandleDisconnectedDevice(true, _device);
}
break;
}
//connection must have been lost, because the callback was not triggered by calling disconnect
Trace.Message($"Disconnected '{_device.Name}' by lost connection");
_adapter.ConnectedDeviceRegistry.TryRemove(gatt.Device.Address, out _);
_adapter.HandleDisconnectedDevice(false, _device);
// inform pending tasks
ConnectionInterrupted?.Invoke(this, System.EventArgs.Empty);
break;
// connecting
case ProfileState.Connecting:
Trace.Message("Connecting");
break;
// connected
case ProfileState.Connected:
Trace.Message("Connected");
//Check if the operation was requested by the user
if (_device.IsOperationRequested)
{
_device.Update(gatt.Device, gatt);
//Found so we can remove it
_device.IsOperationRequested = false;
}
else
{
//ToDo explore this
//only for on auto-reconnect (device is not in operation registry)
_device.Update(gatt.Device, gatt);
}
if (status != GattStatus.Success)
{
// The above error event handles the case where the error happened during a Connect call, which will close out any waiting asyncs.
// Android <= 4.4 uses this switch branch when an error occurs during connect
Trace.Message($"Error while connecting '{_device.Name}'. GattStatus: {status}. ");
_adapter.HandleConnectionFail(_device, $"GattCallback error: {status}");
CloseGattInstances(gatt);
}
else
{
_adapter.ConnectedDeviceRegistry[gatt.Device.Address] = _device;
_adapter.HandleConnectedDevice(_device);
}
break;
// disconnecting
case ProfileState.Disconnecting:
Trace.Message("Disconnecting");
break;
}
}
public override void OnReliableWriteCompleted(BluetoothGatt gatt, GattStatus status)
{
base.OnReliableWriteCompleted(gatt, status);
Trace.Message("OnReliableWriteCompleted: {0}", status);
}