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Fragmented HDLC Packet Parsing

Profile picture for user faizalsrahman
By faizalsrahman , 28 May, 2025
Forums
Gurux.DLMS

I have implemented a Python script to read the Header and scaler values sent from the meter through the Wrapper interface using GXDLMSReader. Similarly, I want to have a function to read a Header and Scaler from a fragmented HDLC frame. Please let me know how I can achieve this.
Note: My current implementation always returns "Invalid HDLC frame," but the frame is being translated correctly in the Gurux online translator.

Profile picture for user Kurumi

Kurumi

1 year 5 months ago

Hi, Have you changed the…

Hi,

Have you changed the interface from WRAPPER to HDLC to GXDLMSClient?

BR,
Mikko

Profile picture for user faizalsrahman

faizalsrahman

1 year 4 months ago

Hi Kurumi, Yes, I have…

Hi Kurumi,
Yes, I have changed the interface to HDLC. I am trying with Low authentication (1), Standard(1) India, with Client Address 16.
After many tries, I failed to translate the HDLC frame. I guess I'm missing something fundamental.

Profile picture for user Kurumi

Kurumi

1 year 4 months ago

Hi, Try with an example…

Hi,

Try with an example client. Are you sending SNRM?
If the meter is not replying anything you need to check the used baud rate.

BR,
Mikko

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