async def readCharacteristic_(self,
characteristic: CBCharacteristic,
use_cached=True) -> NSData:
if characteristic.value() is not None and use_cached is True:
return characteristic.value()
cUUID = characteristic.UUID().UUIDString()
event = self._characteristic_read_events.get_cleared(cUUID)
self.peripheral.readValueForCharacteristic_(characteristic)
await event.wait()
return characteristic.value()
async def readCharacteristic_(self,
characteristic: CBCharacteristic,
use_cached=True) -> NSData:
if characteristic.value() is not None and use_cached is True:
return characteristic.value()
cUUID = characteristic.UUID().UUIDString()
self._characteristic_value_log[cUUID] = False
self.peripheral.readValueForCharacteristic_(characteristic)
while not self._characteristic_value_log[cUUID]:
await asyncio.sleep(0.01)
return characteristic.value()
def peripheral_didUpdateValueForCharacteristic_error_(
self, peripheral: CBPeripheral, characteristic: CBCharacteristic, error: NSError
):
logger.debug("peripheral_didUpdateValueForCharacteristic_error_")
self._event_loop.call_soon_threadsafe(
self.did_update_value_for_characteristic,
peripheral,
characteristic,
characteristic.value(),
error,
)
def peripheral_didUpdateValueForCharacteristic_error_(
self, peripheral: CBPeripheral, characteristic: CBCharacteristic,
error: NSError):
cUUID = characteristic.UUID().UUIDString()
if error is not None:
raise BleakError("Failed to read characteristic {}: {}".format(
cUUID, error))
if (cUUID in self._characteristic_notify_status
and self._characteristic_notify_status[cUUID]):
self._characteristic_notify_callbacks[cUUID](
cUUID, characteristic.value())
logger.debug("Read characteristic value")
self._characteristic_value_log[cUUID] = True
def did_update_value_for_characteristic(self, peripheral: CBPeripheral,
characteristic: CBCharacteristic,
error: NSError):
cUUID = characteristic.UUID().UUIDString()
if error is not None:
raise BleakError("Failed to read characteristic {}: {}".format(
cUUID, error))
notify_callback = self._characteristic_notify_callbacks.get(cUUID)
if notify_callback:
notify_callback(cUUID, characteristic.value())
logger.debug("Read characteristic value")
event = self._characteristic_read_events.get(cUUID)
if event:
event.set()
else:
# only expected on read
pass