My project is a bore pump controller with flow rate, pressure etc and touch screen to control the pump and change parameters. I had a 2 line LCD and upgraded to Nextion 3.2" touch.
I have been using a basic 3.2" Nextion display for some time and it has been working well. I needed another one to continue developing (as I left my prototype unit attached to the bore pump on the farm) so decided to purchase an enhanced 3.5" directly from Itead. From what I can find online, it should behave exactly the same, however it refuses to respond to any commands I send it from my (Microchip PIC) controller.
Is there some difference between the two of which I am unaware?
I connected to a PC and successfully uploaded my design, so I know at a basic level the display is functional. It powers up and shows my main page ok.
I hook up putty and I can see the commands coming from my controller on the Putty screen. I don’t see any response back on the Tx line (scope) at all if I touch the screen. I even modified my code just to send screen reset every 2 seconds but it doesn’t even reset. Baud rate is default at 9600.
I hesitate to try to log a support call given all the negative comments here about that process, so hopefully somebody can give me a clue as to what to try.