def __call__(self, characteristic, event_args):
if isinstance(event_args, ReadCompleteEventArgs):
if event_args.status == GattStatusCode.success:
decoded_value = self.decode(event_args.value)
else:
decoded_value = None
decoded_event_args = DecodedReadCompleteEventArgs.from_read_complete_event_args(
event_args, decoded_value)
elif isinstance(event_args, NotificationReceivedEventArgs):
decoded_value = self.decode(event_args.value)
decoded_event_args = DecodedReadCompleteEventArgs.from_notification_complete_event_args(
event_args, decoded_value)
elif isinstance(event_args, WriteEventArgs):
decoded_value = self.decode(event_args.value)
decoded_event_args = DecodedWriteEventArgs(decoded_value,
event_args.value)
else:
if self.logger:
self.logger.error(
"Unable to handle unknown event args {}".format(
event_args))
return
self.event_to_raise.notify(self.owner, decoded_event_args)
def _on_battery_level_notification(self, characteristic, event_args):
"""
:param characteristic:
:type event_args: blatann.event_args.NotificationReceivedEventArgs
:return:
"""
decoded_value = None
try:
stream = ble_data_types.BleDataStream(event_args.value)
decoded_value = BatteryLevel.decode(stream)
except Exception as e: # TODO not so generic
logger.error("Failed to decode Battery Level, stream: [{}]".format(event_args.value.encode("hex")))
logger.exception(e)
decoded_event_args = DecodedReadCompleteEventArgs.from_notification_complete_event_args(event_args, decoded_value)
self._on_battery_level_updated_event.notify(self, decoded_event_args)
def _on_read_complete(self, characteristic, event_args):
"""
:param characteristic:
:type event_args: blatann.event_args.ReadCompleteEventArgs
"""
decoded_value = None
if event_args.status == GattStatusCode.success:
try:
stream = ble_data_types.BleDataStream(event_args.value)
decoded_value = BatteryLevel.decode(stream)
except Exception as e: # TODO not so generic
logger.error("Failed to decode Battery Level, stream: [{}]".format(binascii.hexlify(event_args.value)))
logger.exception(e)
decoded_event_args = DecodedReadCompleteEventArgs.from_read_complete_event_args(event_args, decoded_value)
self._on_battery_level_updated_event.notify(self, decoded_event_args)
def _read_complete(self, characteristic, event_args):
"""
:param characteristic:
:type event_args: blatann.event_args.ReadCompleteEventArgs
"""
decoded_value = None
if event_args.status == GattStatusCode.success:
try:
stream = ble_data_types.BleDataStream(event_args.value)
decoded_value = self.data_class.decode(stream)
except Exception as e: # TODO not so generic
logger.error("Service {}, Characteristic {} failed to decode value on read. "
"Stream: [{}]".format(self.service.uuid, self.uuid, binascii.hexlify(event_args.value)))
logger.exception(e)
decoded_event_args = DecodedReadCompleteEventArgs.from_read_complete_event_args(event_args, decoded_value)
self._on_read_complete_event.notify(characteristic, decoded_event_args)