def write_characteristic(self, sender: GattLocalCharacteristic,
args: GattWriteRequestedEventArgs):
"""
Called by pythonnet when a write request is submitted
Parameters
----------
sender : GattLocalCharacteristic
The object representation of the gatt characteristic whose value we
should write to
args : GattWriteRequestedEventArgs
The event arguments for the write request
"""
deferral: Deferral = args.GetDeferral()
request: GattWriteRequest = sync_async_wrap(GattWriteRequest,
args.GetRequestAsync)
logger.debug("Request value: {}".format(request.Value))
reader: DataReader = DataReader.FromBuffer(request.Value)
n_bytes: int = reader.UnconsumedBufferLength
value: bytearray = bytearray()
for n in range(0, n_bytes):
next_byte: int = reader.ReadByte()
value.append(next_byte)
logger.debug("Written Value: {}".format(value))
self.write_request(str(sender.Uuid), value)
if request.Option == GattWriteOption.WriteWithResponse:
request.Respond()
logger.debug("Write Complete")
deferral.Complete()
def read_characteristic(self, sender: GattLocalCharacteristic,
args: GattReadRequestedEventArgs):
"""
The is triggered by pythonnet when windows receives a read request for
a given characteristic
Parameters
----------
sender : GattLocalCharacteristic
The characteristic Gatt object whose value was requested
args : GattReadRequestedEventArgs
Arguments for the read request
"""
logger.debug("Reading Characteristic")
deferral: Deferral = args.GetDeferral()
value: bytearray = self.read_request(str(sender.Uuid))
logger.debug(f"Current Characteristic value {value}")
value = value if value is not None else b"\x00"
writer: DataWriter = DataWriter()
writer.WriteBytes(value)
logger.debug("Getting request object {}".format(self))
request: GattReadRequest = sync_async_wrap(GattReadRequest,
args.GetRequestAsync)
logger.debug("Got request object {}".format(request))
request.RespondWithValue(writer.DetachBuffer())
deferral.Complete()
def read(sender: GattLocalCharacteristic,
args: GattReadRequestedEventArgs):
deferral: Deferral = args.GetDeferral()
value = self.val
writer: DataWriter = DataWriter()
writer.WriteBytes(value)
request: GattReadRequest = sync_async_wrap(GattReadRequest,
args.GetRequestAsync)
request.RespondWithValue(writer.DetachBuffer())
deferral.Complete()
def write(sender: GattLocalCharacteristic,
args: GattWriteRequestedEventArgs):
deferral: Deferral = args.GetDeferral()
request: GattWriteRequest = sync_async_wrap(
GattWriteRequest, args.GetRequestAsync)
reader: DataReader = DataReader.FromBuffer(request.Value)
n_bytes: int = reader.UnconsumedBufferLength
value: bytearray = bytearray()
for n in range(0, n_bytes):
next_byte: int = reader.ReadByte()
value.append(next_byte)
self.val = value
if request.Option == GattWriteOption.WriteWithResponse:
request.Respond()
deferral.Complete()