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How to deal with corrupted characters in RS-232 communication

Hello,
I'm using LabWindows to read information about products' weight of a weighbridge.
The TextBox shows corrputed characters with the numbers of weight in it,
Maybe the hexadecimal cause this problem,but I dont know how to deal with it.
And how could I show the weight information using floating point numbers?
 
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Before thinking about problems in serial communications, do you know if your weighbridge transmits measures in plain text or in binary or other format? What you interpret as corrupted characters could be control characters or binary data that must be converted into actual measures. Instrument documentation should detail transmission protocol including control characters and so on.


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