async def discover_characteristics(self, service: CBService) -> NSArray:
future = self._event_loop.create_future()
self._service_characteristic_discovered_futures[
service.startHandle()] = future
self.peripheral.discoverCharacteristics_forService_(None, service)
await future
return service.characteristics()
async def _did_discover_characteristics_for_service(
self, cbservice: CoreBluetooth.CBService,
cbcharacteristics: List[CoreBluetooth.CBCharacteristic],
error: Foundation.NSError):
service_identifier = cbservice.UUID().UUIDString()
service = self._services_by_identifier.get(service_identifier)
if service is not None:
service._did_discover_characteristics(cbcharacteristics, error)
def did_discover_characteristics_for_service(self,
peripheral: CBPeripheral,
service: CBService,
error: Optional[NSError]):
future = self._service_characteristic_discovered_futures.get(
service.startHandle())
if not future:
logger.debug(
f"Unexpected event didDiscoverCharacteristicsForService for {service.startHandle()}"
)
return
if error is not None:
exception = BleakError(
f"Failed to discover characteristics for service {service.startHandle()}: {error}"
)
future.set_exception(exception)
else:
logger.debug("Characteristics discovered")
future.set_result(None)