Data filtering

[Fredo123Danzel]

Hi, 

I have a device that generates random frames, and I only want to retrieve the last frame that was sent.

Full frame: 0112 FF03 EBDF 0374 E701 12FF 03C8 7D10 BD80 0112 080F 0000 1B58 0200 0004 0E02 0100 0100 00F3 FE

Frame to be sent in the last position: 0112 080F 0000 1B58 0200 0004 0E02 0100 0100 00F3 FE

Does anyone have an idea how to automatically detect and extract this last frame?
Thanks in advance for your help!

[Henrik_Volkers]

Does every frame start with 0112 ? (and is that unique? mean it does not show up in the data again?)

Anything more you know from the format? (frame length encoded? check sum? )

What do you mean by last frame?  Last complete frame at request time? 

[Fredo123Danzel]

All frames start with 0112.

0112 FF03 EBDF 0374 E7

0112 FF03 C8 7D10 BD80

0112 080F 0000 1B58 0200 0004 0E02 0100 0100 00F3 FE

The difference lies in the frame size and in the second packet. The last frame is the third one, but sometimes it can appear in the fourth position because it’s random. However, the largest frame always comes in the last position.

[aeastet]

What is the delimiter for this data? Is there a delimiter or is it one big string?

[aeastet]

Here is an example that should get you started:

[billko · Accepted solution]

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@Fredo123Danzel wrote:

Hi, 

I have a device that generates random frames, and I only want to retrieve the last frame that was sent.

Full frame: 0112 FF03 EBDF 0374 E701 12FF 03C8 7D10 BD80 0112 080F 0000 1B58 0200 0004 0E02 0100 0100 00F3 FE

Frame to be sent in the last position: 0112 080F 0000 1B58 0200 0004 0E02 0100 0100 00F3 FE

Does anyone have an idea how to automatically detect and extract this last frame?
Thanks in advance for your help!

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They are NOT "random" frames; each one means something.  I would suggest that, instead of asking a zillion of questions about these messages, you should look up the definitions of the messages themselves.  Your knowledge will then leap forward and you may no longer even need us to answer your questions.

[billko]

Also, just FYI, this appears to be directly related to https://forums.ni.com/t5/LabVIEW/Hexadecimal-to-Decimal-Conversion/td-p/4442655 but not enough to be in the same topic.