Hi Sorry for what it seems a basic question (I am an amateur in bytes and stuff). I read some info from an instrument through a TCP Visa connection. Data is read either as Ascii or Bin as follows To distinguish between ASCII command and binary data from the instrument each data block is transmitted in the following format:0 1 2 3 4…Len+4TypeHi TypeLo LenHi LenLo DataLenHi, LenLo contain length of the Data part of the message, TypeHi, TypeLo determine the type:• TypeHi = 55h, TypeLo = AAh – ASCII command, Data part of the message contains the ASCII string(transferred string is not terminated by CR!).• TypeHi = 66h, TypeLo = BBh – binary command, Data part of the message contains the binarystream data. I have difficulties in reading these. an exemple of what I tryin (without success) is attached here (not of much use but it gives an exemple of what the instrumet sends back). Thanks for help

Here's my version of Tim's above. I definitely would not make 55AA the default case, of course. As I mentioned: if the "PRESNC:" header can vary, use another case structure. If the number of values can vary, create an array instead of a cluster (using spreadsheet string to array" with comma as delimiter). ...

What you should do is read 4 bytes. You can use the Unflatten From String to get the data type and the data length from those 4 bytes. You then read the number of bytes stated in the data length. You can then parse the data based on the data type.

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convert a hex string to bytes/values

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What is the dataype of the "binary stream data"??? (SGL array? I16 array? Byte order? etc.)

It is not stated (I copied above all the info I got from the instruction manual)... I think it is integer (I will check tomorrow when I go to the lab).

thanks

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convert a hex string to bytes/values

Re: convert a hex string to bytes/values