def to_bytes(self) -> bytes:
out = bytearray()
out.append(self.ACCESS_DESCRIPTOR)
out.extend(b"\x02\x04") # structure of 4 elements
out.extend(self.restricting_object.to_bytes())
out.extend(
dlms_data.OctetStringData(
time.datetime_to_bytes(self.from_value)
).to_bytes()
)
out.extend(
dlms_data.OctetStringData(time.datetime_to_bytes(self.to_value)).to_bytes()
)
out.extend(b"\x01\x00") # empty array for selected values means all columns
# TODO: implement selected values
return bytes(out)
def send_hls_reply(self) -> Optional[bytes]:
return self.action(
method=cosem.CosemMethod(
enumerations.CosemInterface.ASSOCIATION_LN,
cosem.Obis(0, 0, 40, 0, 0),
1,
),
data=dlms_data.OctetStringData(
self.dlms_connection.get_hls_reply()).to_bytes(),
)
def to_bytes(self) -> bytes:
out = bytearray()
out.extend(b"\x02\x04") # A structure of 4 elements
out.extend(
dlms_data.UnsignedLongData(
self.cosem_attribute.interface.value).to_bytes())
out.extend(
dlms_data.OctetStringData(
self.cosem_attribute.instance.to_bytes()).to_bytes())
out.extend(
dlms_data.IntegerData(self.cosem_attribute.attribute).to_bytes())
out.extend(dlms_data.UnsignedLongData(self.data_index).to_bytes())
return bytes(out)