Using Nextion displays with Arduino

@PerryBebbington et. all. I posted this in another section but not sure it will get attention there.

I have not yet been successful in understanding the communication from the Nextion. I have a few pages that are set up and I only need to capture the string that is sent when pages changes. from this I will create a CASE statement and execute accordingly .

For instance, when I am viewing the debug, and I am moving from page0 to page1, I get an simulator output (I am assuming I will see this as a serial string?) of "65 00 02 01 FF FF FF"
So I have recorded all of these strings associated with the page movements and created a table of string, pulse and direction. This will not be a high frequency event. (it is a shifter for a car)

Can I just use a simple serial program to read the string and then act upon the string in a CASE Statement?
Thank you for any assistance you may be able to render. I have some pictures but dont know how to or if I can post them