'Serial communication reverse enginnering

I am attempting to reverse engineer a device which utilises a serial line to communicate.

I have not currently been able to determine the baud rate of the serial line as of yet. Upon reading the data at a certain baud rate and converting it over to hex, I can see that some of the digits change each time I take a reading.

I am certain that each time I take a reading the device is performing the same action, and should therefore be outputting the same signal.

If I receive different digits each time I take a measurement, would this potentially be a trait of selecting an incorrect baud rate?



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