I wanted a wireless display to tell me my speed and battery remaining, so I built one using an Arduino, an HC-05 bluetooth module, and an LCD display from Ebay. I also show the condition of the battery in the remote. It would be easy to add additional fields and add a button to see multiple pages.
This communicates with one of my two VESC controllers on my homemade electric mountain board.
If anyone is interested I’d be happy to share all the details.