I'm using ITEADLIB_Arduino_Nextion-master. I want to change from Arduino the background image of the current page (I know the page id). How can it do?
What battery is needed to preserve RTC settings to a enhanced 4.3"? (battery code)
This can be found by visiting https://www.itead.cc/wiki/Nextion_HMI_Solution
Look for your model and review its datasheets
I am almost certain all use the CR1220 cell
Many questions are addressed in the above link and pages linked from it