def did_update_value_for_characteristic(
self,
peripheral: CBPeripheral,
characteristic: CBCharacteristic,
value: bytes,
error: NSError,
):
cUUID = characteristic.UUID().UUIDString()
c_handle = characteristic.handle()
if error is not None:
raise BleakError(
"Failed to read characteristic {}: {}".format(cUUID, error)
)
notify_callback = self._characteristic_notify_callbacks.get(c_handle)
if notify_callback:
notify_callback(c_handle, value)
logger.debug("Read characteristic value")
event = self._characteristic_read_events.get(cUUID)
if event:
event.set()
else:
# only expected on read
pass
async def stopNotify_(self, characteristic: CBCharacteristic) -> bool:
c_handle = characteristic.handle()
if c_handle not in self._characteristic_notify_callbacks:
raise ValueError("Characteristic notification never started")
event = self._characteristic_notify_change_events.get_cleared(c_handle)
self.peripheral.setNotifyValue_forCharacteristic_(False, characteristic)
# wait for peripheral_didUpdateNotificationStateForCharacteristic_error_ to set event
# await event.wait()
self._characteristic_notify_callbacks.pop(c_handle)
return True
async def startNotify_cb_(self, characteristic: CBCharacteristic,
callback: Callable[[str, Any], Any]) -> bool:
c_handle = characteristic.handle()
if c_handle in self._characteristic_notify_callbacks:
raise ValueError("Characteristic notifications already started")
self._characteristic_notify_callbacks[c_handle] = callback
event = self._characteristic_notify_change_events.get_cleared(c_handle)
self.peripheral.setNotifyValue_forCharacteristic_(True, characteristic)
# wait for peripheral_didUpdateNotificationStateForCharacteristic_error_ to set event
# await event.wait()
return True
def did_update_notification_for_characteristic(
self, peripheral: CBPeripheral, characteristic: CBCharacteristic,
error: NSError):
cUUID = characteristic.UUID().UUIDString()
c_handle = characteristic.handle()
if error is not None:
raise BleakError(
"Failed to update the notification status for characteristic {}: {}"
.format(cUUID, error))
logger.debug("Character Notify Update")
event = self._characteristic_notify_change_events.get(c_handle)
if event:
event.set()
else:
logger.warning(
"Unexpected event didUpdateNotificationStateForCharacteristic")