HDLC 4 byte server address error with C library

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By Zappa , 17 March, 2022
Forums
Gurux.DLMS

Hello,

I´m connecting with AC6000 meter. Client address:0x01 Phy server:0x11 Logical address:0x01

Those are the frames:

Sending SNRM...
TX: 7E A0 08 02 23 03 93 3E 74 7E
RX: 7E A0 23 03 00 02 00 23 73 C0 48 81 80 14 05 02 00 80 06 02 00 80 07 04 00 00 00 01 08 04 00 00 00 01 CE 6A 7E

Server address bytes are: 00 02 00 23 ,is a 4 byte HDLC address.

Gurux Director is working properly, but when I try with C library I get DLMS_ERROR_CODE_FALSE with server address.

Any clue about how to solve this in C library?

Thank you.

Kurumi

4 years 2 months ago

Hi,

The meter's server address can be expressed in two bytes, but the AC6000 requires four bytes.

You can count it like this:

settings.serverAddress = cl_getServerAddress(1, 17, 4);

BR,
Mikko

fon Luck

4 years 1 month ago

Hello!
In file dlms.c function dlms_check Hdlc Address() save target address into setting->server Address.
But, target address converted to uint16_t, therefore hi address is lost and is Target() can't check it.
I find this closed issue: http://www.gurux.fi/node/15797

Kurumi

4 years 1 month ago

Hello fon Luck,

Please, create a new topic if you have a new question. It's impossible to keep track what was the original question.

I believe that you are right. I need to verify why this is cast to uint16_t. I'll get back to this as soon as I have more info.

BR,
Mikko