This is a simple project I created because I wanted an inexpensive OBD-II display for my Ford F250 Diesel. Yes, I know the code is not "Optimized" and is "Ugly". So what. It works for me. Feel free to copy and clean-up for your own use. :) This project uses an Arduino (MightyCore Mega1284p), a SparkFun OBD-II adapter and a 2.4" Nextion display. Hope you find it useful. If not, well at least it was free!