def __init__(self, *, service=None, secondary=False, **initial_values):
if service is None:
# pylint: disable=no-member
self.bleio_service = _bleio.Service(self.uuid.bleio_uuid,
secondary=secondary)
elif not service.remote:
raise ValueError(
"Can only create services with a remote service or None")
else:
self.bleio_service = service
# This internal dictionary is manipulated by the Characteristic descriptors to store their
# per-Service state. It is NOT managed by the Service itself. It is an attribute of the
# Service so that the lifetime of the objects is the same as the Service.
self.bleio_characteristics = {}
# Set the field name on all of the characteristic objects so they can replace themselves if
# they choose.
# TODO: Replace this with __set_name__ support.
for class_attr in dir(self.__class__):
if class_attr.startswith("__"):
continue
value = getattr(self.__class__, class_attr)
if not isinstance(value, Characteristic) and not isinstance(
value, ComplexCharacteristic):
continue
value.field_name = class_attr
# Get or set every attribute to ensure that they are all bound up front. We could lazily
# init them but the Nordic Soft Device requires characteristics be added immediately
# after the Service. In other words, only characteristics for the most recently added
# service can be added.
if not self.remote:
if class_attr in initial_values:
setattr(self, class_attr, initial_values[class_attr])
else:
getattr(self, class_attr)
adapter = _bleio.adapter
if adapter_name is not None:
adapter.name = adapter_name
else:
adapter.name = ""
# Convert the adapter name into a scan response, so it shows up as something
# other than "N/A".
scan_response = None
if adapter_name is not None:
adapter_name_bytes= adapter_name.encode("utf-8")
scan_response = bytearray([len(adapter_name_bytes) + 1, 8]) + adapter_name_bytes
# Create the BLE service that other devices will connect to in order to discover
# our contact tracing token.
bt_service = _bleio.Service(bluetrace_uuid, secondary=False)
print("Advertising data: ", hexlify(advertising_data))
def bind_to_service(service, uuid, token):
properties = _bleio.Characteristic.READ | _bleio.Characteristic.WRITE
read_perm = _bleio.Attribute.OPEN
write_perm = _bleio.Attribute.OPEN
return _bleio.Characteristic.add_to_service(
service,
uuid,
initial_value = token,
max_length = len(token),
fixed_length = True,
properties = properties,
read_perm = read_perm,
write_perm = write_perm
)