def get_request() -> xdlms.GetRequestNormal:
# invocation counter
return xdlms.GetRequestNormal(cosem_attribute=cosem.CosemAttribute(
interface=enumerations.CosemInterface.DATA,
instance=cosem.Obis(0, 0, 0x2B, 1, 0),
attribute=2,
))
def get(
self,
cosem_attribute: cosem.CosemAttribute,
access_descriptor: Optional[RangeDescriptor] = None,
) -> bytes:
self.send(
xdlms.GetRequestNormal(
cosem_attribute=cosem_attribute, access_selection=access_descriptor
)
)
all_data_received = False
data = bytearray()
while not all_data_received:
get_response = self.next_event()
if isinstance(get_response, xdlms.GetResponseNormal):
data.extend(get_response.data)
all_data_received = True
continue
if isinstance(get_response, xdlms.GetResponseWithBlock):
data.extend(get_response.data)
self.send(
xdlms.GetRequestNext(
invoke_id_and_priority=get_response.invoke_id_and_priority,
block_number=get_response.block_number,
)
)
continue
if isinstance(get_response, xdlms.GetResponseLastBlock):
data.extend(get_response.data)
all_data_received = True
continue
if isinstance(get_response, xdlms.GetResponseLastBlockWithError):
raise DataResultError(
f"Error in blocktransfer of GET response: {get_response.error!r}"
)
if isinstance(get_response, xdlms.GetResponseNormalWithError):
raise DataResultError(
f"Could not perform GET request: {get_response.error!r}"
)
return bytes(data)