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It's hard to understand what you wrote there, but my guess is that you meant "When I send commands to the device they get interpreted as text and displayed, rather than being interpreted as commands and executed."
So based on the code you have showed us so far (i.e. none at all) I'm going to guess that you are sending those commands as text (i.e. using a String) which causes the non-text parts of them to be mangled when you encode that text to bytes. The solution would be to send the command from an array of bytes, or something like that.
Of course my guess could be wrong; you could post some code which exhibits the problem.