Hello Nextion hackers,
With the help of the forum members and Itead I have designed a demo for the 320x240 display. In the zip file you find a read me to the programming part (for the ATmega328 with Atmel Studio 6). In appendix -> nextion the HMI design. In appendix -> povray the layout design. It's far from complete, but after 2 days of hacking, I am going to do something else (square eyes).
I like comments!!!