You can configure text signals even if no text has been received. You will need information about the exact structure of the string.
It is much easier (and more reliable) if you can already receive a text. Then the received text is shown in the preview area of the text modules in the Analog tab. The prerequisite for this is that the connection to the text source is established and the acquisition is running.
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For fixed width texts, the desired sections for the derived text signals can easily be selected with the mouse.
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For texts whose informational units are separated by delimiters, the individual text parts can be detected and selected.
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For texts in the JSON format, the values of the detected objects are listed.
So, any number of text signals can be defined and provided with information from the source text.