Read a set of meters from a unique RS-485 communication bus

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By Diego2911 , 15 April, 2021
Forums
Gurux.DLMS

Hi

I'm working on a smart metering project. I want to be able to read one specific meter from a set of meters, all of this meters are conected by RS-485 to a unique RS-485 bus communication. I'm able to connect to one meter alone by RS-485 and read it, but I don't know how identify a specific meter from a set of them all of them connected to a unique RS-485 bus and read it. What process or what object can I use for this purpose?? The net is something like the picture. Thanks.

Kurumi

5 years 5 months ago

Hi,

This depends on the meter. Some metes are using serial numbers as device addresses. Some meters are expecting that one of the meters is working as a master and other meters are added to the SAP table of the master meter.

BR,

Mikko

Diego2911

5 years 5 months ago

Thanks for the response. In that case, how can I set the serial number as device address with gurux libraries for python ??

Best regards.

Kurumi

5 years 5 months ago

Hi,

You can try with client example. Add -n parameter. Like this:
-n METER_SERIAL_NUMER.
Function is GXDLMSClient.getServerAddressFromSerialNumber

Note! Some meters might use a different formula to count the server address from the serial number.

BR,
Mikko