Connection problems via Bluetooth

By manuel , 27 December, 2021

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Hi Mikko,

could you please help me? I have problems with the connection establishment when I am using Bluetooth. I use the Bluetooth probe KN01(Bluetooth infrared adapter 2515).

At the beginning I am set up the parameter of the IR-Probe in the Bluetooth Adapter to:
Baudrate: 9600
Paritity: None
Data: 8
Stop: 1

When connecting to a Landis+Gyr meter (E450) I always get the following answer:

Authentication: Authentication.LOW
ClientAddress: 0x1
ServerAddress: 0x1
Default: Default.DLMS
TX: 19:01:20 7E A0 07 03 93 8C 11 7E
RX: 19:01:20 7E A0 1E 03 03 73 40 CC 81 80 12 05 01 80 06 01 CA 07 04 00 00 01 08 04 00 00 01 30 7E 7E
TX: 19:01:20 7E A0 44 03 10 65 94 E6 E6 00 60 36 A1 09 06 07 60 85 74 05 08 01 02 8A 02 07 80 8B 07 60 85 74 05 08 02 01 AC 0A 80 08 31 32 33 34 35 36 37 38 BE 10 04 0E 01 00 00 06 5F 1F 04 00 1C 03 20 FF 88 81 7E

There is no error message but the connection is interrupted and the software waits for a response which it never gets.

Establishing a connection using a normal IR-USB adapter works without any problems. (Basically the same message except the response)

Do you have any idea where the problem could be? Maybe its caused by changing baudrate or it is a time issue?

Thanks in advance!

Best regards,
Manuel

Hi,

I believe that there is not all the data. It seems like some bytes are missing from the first two messages.

BR,
Miko

Hi Mikko,

happy new year!

Thanks a lot for your help!
I took another look at the problem and found that the adapter cuts away the hex values 0xFF during transmission. The reason is that 0xFF is used for internal commands. So I had to replace the values 0xFF with 0xFF 0xFF (double), then a simple 0xFF is forwarded. So the problem is solved.

Thanks a lot!

BR,
Manuel

Hi Manuel,

Happy new year to you also. Thanks for letting me know that everything is working as expected.

BR,
Mikko

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Hi,

Hi Mikko,

Hi Manuel,