One Meter Responds to Association View GET Request in DLMS over BLE with HDLC and LOW Authentication

By vadiraj Revankar, 21 July, 2025
Forums
Gurux DLMS for Android

Hi,

I’m implementing DLMS communication over BLE using HDLC framing and password-based (LOW) authentication.
After sending the AARQ, I successfully receive AARE from all meters. However, only one meter (Single Phase - LGZ) responds to the Association View GET request; the others do not respond.
I’m using client address 32 and HDLC addressing as per specification. BLE settings and timing appear correct.
Could this issue be related to BLE fragmentation, timing delays, or meter-specific restrictions? Also, should client addresses vary depending on the meter?
Any guidance or suggestions would be appreciated.
Thanks!

Kurumi

4 months 2 weeks ago

Hi,

If the meter is returning the AARE the connection is established and you should be able to read the meter objects.

The client address depends on the meter manufacturer or model, but if you can connect to the meter, that is not the issue.

Are you using a BLE dongle or is BLE integrated into the meter? If you are using a dongle, the baud rate might be wrong.

BR,
Mikko

vadiraj Revankar

4 months 2 weeks ago

Hi, thanks for your response.
We are connecting the BLE Optical Probe to the meter. Is there any issue with data transmission since data passes continuously over USB stream, but for BLE we send data packet-wise using MTU 23?

Kurumi

4 months 2 weeks ago

Hi,

There shouldn't be any problems if the baud rate is correct. What Optical Probe model are you using?

BR,
Mikko