Problem with setValue/addCaptureObject in GXDLMSProfileGeneric

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By flok , 9 January, 2019
Forums
Gurux DLMS for Java

Hi!
I have a problem with setValue/addCaptureObject in GXDLMSProfileGeneric: I get an exception that the attributeIndex is not valid because it is < 1. I think that the conversion from byte to integer for attributeIndex in setValue is wrong. In blue book 12.2 5.4.2 profile generic the attributeIndex of capture objects is defined as unsigned. The conversion in GXDLMSProfileGeneric seems to be signed. SO if I use the following line I get the expcted positive value:

addCaptureObject(obj, (((Byte)tmp[2]) & 0xFF), ((Number) tmp[3]).intValue());

Kind regards
flo

flok

7 years 4 months ago

Hi,

the meter is returning i.e. 254 but in Java byte is signed. So if you use ((Number) tmp[2]).intValue() for int conversion you get a negative value. If you use ((Byte)tmp[2]) & 0xFF) you get the real value because it handles the byte value as unsigned.
For most meters it is not relevant because they don't use such high attributeIndex but my Kamstrup Omnipower does use them for placeholders.
Kind regards
flo