Trying to get arduino to react to data other than tag serial number

Grumpy_Mike:
It would have been good to know that before reply #12.

Simply change your code to read all the bits of the UID. It is your code you can change what it does.

My apologies, I'm quite new at all of this.
Any idea what I need to change?
You make it sound obviously simple but somehow I just can't figure out what to change to get it to look for anything beyond 88 04 08 7A.

What code do I need to change/add to have it look beyond that?