class DescriptorDotNet(Descriptor):
"""The Descriptor DotNet Class"""
def __init__(self, characteristic, d_object, loop=None):
super(DescriptorDotNet, self).__init__(characteristic)
self.loop = loop if loop else asyncio.get_event_loop()
self.characteristic = characteristic
self.uuid = d_object.Uuid.ToString()
self.d_object = d_object
self._uwp_bluetooth = UWPBluetooth()
async def read_value(self):
"""Read Characteristic Descriptor"""
# print("Get Characteristics for {0}...".format(self.s_object.Uuid.ToString()))
if not self.characteristic:
raise Exception(
"Characteristic {0} was not found!".format(self.uuid)
)
read_results = await wrap_dotnet_task(
self._uwp_bluetooth.ReadDescriptorValueAsync(
self.characteristic.c_object
),
loop=self.loop,
)
if read_results.Item2:
status, value = read_results.Item1, bytearray(read_results.Item2)
if status == GattCommunicationStatus.Success:
# print("Read Characteristic {0} : {1}".format(uuid, value))
pass
else:
raise Exception(
"Could not read descriptor value for {0}: {1}",
self.characteristic.Uuid.ToString(),
status,
)
else:
return None
return list(value)
class DeviceDotNet(Device):
"""The Device Base Class"""
def __init__(self, address, loop=None):
super(DeviceDotNet, self).__init__(loop)
self.loop = loop if loop else asyncio.get_event_loop()
self.address_hex = hex(address)
self.address = address
self.properties = None
# UWP .NET
self._dotnet_task = None
self._uwp_bluetooth = UWPBluetooth()
self._devices = {}
self.services_resolved = None
self.is_services_resolved = False
self.connect_succeeded = None
self.disconnect_succeeded = None
self.services_resolved = None
@property
def name(self):
raise NotImplementedError()
async def connect(self):
"""Connect to device"""
# Initiate Connection
self._dotnet_task = await wrap_dotnet_task(
self._uwp_bluetooth.FromBluetoothAddressAsync(self.address),
loop=self.loop)
def _ConnectionStatusChanged_Handler(sender, args):
print("_ConnectionStatusChanged_Handler: " + args.ToString())
# Not Working for some reason?
self._dotnet_task.ConnectionStatusChanged += _ConnectionStatusChanged_Handler
# Discover Services
await self.discover_services()
async def disconnect(self):
"""Disconnect to device"""
self._dotnet_task.Dispose()
self._dotnet_task = None
async def is_connected(self):
if self._dotnet_task:
return (self._dotnet_task.ConnectionStatus ==
BluetoothConnectionStatus.Connected)
else:
return False
def _services_resolved(self):
# Notify User that Services have been Discovered
self.is_services_resolved = True
if self.services_resolved != None:
self.services_resolved()
async def get_properties(self):
"""Get Device Properties"""
raise NotImplementedError()
async def discover_services(self):
"""Discover Device Services"""
if self.services:
return self.services
else:
# print("Get Services...")
services = await wrap_dotnet_task(
self._uwp_bluetooth.GetGattServicesAsync(self._dotnet_task),
loop=self.loop,
)
if services.Status == GattCommunicationStatus.Success:
self.services = [
Service(device=s.Device,
uuid=s.Uuid.ToString(),
s_object=s) for s in services.Services
]
else:
raise Exception("Could not get GATT services.")
# Discover Characteristics for Each Service
await asyncio.gather(*[
asyncio.ensure_future(service.discover_characteristics(),
loop=self.loop)
for service in self.services
])
self._services_resolved()
async def read_char(self, uuid):
"""Read Service Char"""
for s in self.services:
for c in s.characteristics:
if str(uuid) == c.uuid:
characteristic = c.c_object
if not characteristic:
raise Exception("Characteristic {0} was not found!".format(uuid))
read_results = await wrap_dotnet_task(
self._uwp_bluetooth.ReadCharacteristicValueAsync(characteristic),
loop=self.loop,
)
status, value = read_results.Item1, bytearray(read_results.Item2)
if status == GattCommunicationStatus.Success:
# print("Read Characteristic {0} : {1}".format(uuid, value))
pass
else:
raise Exception(
"Could not read characteristic value for {0}: {1}",
characteristic.Uuid.ToString(),
status,
)
return list(value)
async def write_char(self, uuid, data, response=False):
"""Write Service Char"""
for s in self.services:
for c in s.characteristics:
if str(uuid) == c.uuid:
characteristic = c.c_object
if not characteristic:
raise Exception("Characteristic {0} was not found!".format(uuid))
write_results = await wrap_dotnet_task(
self._uwp_bluetooth.WriteCharacteristicValueAsync(
characteristic, data, response),
loop=self.loop,
)
if write_results == GattCommunicationStatus.Success:
# print("Write Characteristic {0} : {1}".format(uuid, data))
pass
else:
raise Exception(
"Could not write value {0} to characteristic {1}: {2}",
data,
characteristic.Uuid.ToString(),
write_results,
)
async def start_notify(self, uuid, callback: Callable[[str, Any], Any],
**kwargs):
"""Start Notification Subscription"""
# Find the Characteristic object
for s in self.services:
for c in s.characteristics:
if str(uuid) == c.uuid:
characteristic = c.c_object
if self._notification_callbacks.get(str(uuid)):
await self.stop_notify(uuid)
dotnet_callback = TypedEventHandler[GattCharacteristic, Array[Byte]](
_notification_wrapper(callback))
status = await wrap_dotnet_task(
self._uwp_bluetooth.StartNotify(characteristic, dotnet_callback),
loop=self.loop,
)
if status != GattCommunicationStatus.Success:
raise Exception(
"Could not start notify on {0}: {1}",
characteristic.Uuid.ToString(),
status,
)
async def stop_notify(self, uuid):
"""Stop Notification Subscription"""
# Find the Characteristic object
for s in self.services:
for c in s.characteristics:
if str(uuid) == c.uuid:
characteristic = c.c_object
# THIS IS NOT CURRENTLY STOPPING NOTIFICATION IMMEDIATELY
status = await wrap_dotnet_task(
self._uwp_bluetooth.StopNotify(characteristic), loop=self.loop)
if status != GattCommunicationStatus.Success:
raise Exception(
"Could not start notify on {0}: {1}",
characteristic.Uuid.ToString(),
status,
)
async def read_descriptor(self, uuid):
"""Read Characteristic Descriptor"""
for s in self.services:
for c in s.characteristics:
if str(uuid) == c.uuid:
characteristic = c.c_object
if not characteristic:
raise Exception("Characteristic {0} was not found!".format(uuid))
read_results = await wrap_dotnet_task(
self._uwp_bluetooth.ReadDescriptorValueAsync(characteristic),
loop=self.loop)
if read_results.Item2:
status, value = read_results.Item1, bytearray(read_results.Item2)
if status == GattCommunicationStatus.Success:
# print("Read Characteristic {0} : {1}".format(uuid, value))
pass
else:
raise Exception(
"Could not read descriptor value for {0}: {1}",
characteristic.Uuid.ToString(),
status,
)
else:
return None
return list(value)