Client-server communication

Forum Rules

Before commenting read Forum rules

Don't comment the topic if you have a new question.

You can create a new topic selecting correct category from Gurux Forum and then create a new topic selecting "New Topic" from the top left.

By fernando , 24 August, 2020
Forums
Gurux.DLMS

Hi,

I would like to understand how the client-server connection works.

I am using ANSI C via RS-232 serial port. How does the client initiate communication with the server? What is the address you need to connect to a specific server, a MAC address?
In the command:
// Initialize settings using Logical Name referencing and HDLC.
cl_init (& con.settings, 1, 16, 1, DLMS_AUTHENTICATION_NONE, NULL, DLMS_INTERFACE_TYPE_HDLC);

16 is the client ID, 1 is the server ID, what are those IDs? If I change the server ID it still connects.

If I had more than one meter, how could I connect to one or the other?

Thank you

Kurumi

5 years 11 months ago

Hi,

You can read basics from the addressing:
https://www.gurux.fi/dlmsaddress

If you have several meters in RS-485 bus you can (usually) use meter serial number to count the address for each meter

BR,
Mikko