Read data from Data object type Array

By KostaG, 18 July, 2024
Forums
General discussion

Hi,

I am having trouble trying to decode, from client-side, a Data object with Array type. I managed to read the Data object but I don't know how to retrieve it's values. Can you help me with this problem?

Thank you,
BR.

Kurumi

9 months ago

Hi,

You didn't tell what programming language you are using, but it's already converted from bytes to variant values.

You can loop the array something like this:

GXDLMSData data = new GXDLMSData();
//Read the value.
foreach(var it in (GXArray) data.Value)
{
//Print value.
}

BR,
Mikko

KostaG

9 months ago

Sorry, I forgot about the language. I'm programming in ANSI C. I do the following in server-side to store the data in the GXArray in the preRead method:

e->value.vt = DLMS_DATA_TYPE_OCTET_STRING;
e->byteArray = 1;
e->handled = 1;
e->skipMaxPduSize = 1;

bb_setUInt8(e->value.byteArr, DLMS_DATA_TYPE_ARRAY);
hlp_setObjectCount(25 * 2, e->value.byteArr);
for (uint16_t i = 0; i < 25; i++) {
bb_setUInt8(e->value.byteArr, DLMS_DATA_TYPE_FLOAT32);
bb_setFloat(e->value.byteArr, data_buffer[i]);
}

I checked using GXDLMSDIrector that I'm writing correctly the data values to the Array. I tried what you proposed but it's not working.

Any ideas of what could be the problem here?

BR.