The goal of this thread is to take the OpenSource FishTank project and modernize it so that it can fit on an Uno. Perhaps by taking advantage of the newer features in the Nextion Editor, it can be accomplished. So take a shot at building smarTank2.0
The Orginal OpenSource FishTank project is located here.
Which model of Nextion are you using for the project.?
Is it an Enhanced Model with an RTC?
The first thing that I noted is that everything from the HMI it is doing a Send Component ID over to the MCU for processing by the MCU exclusively. This means that if some of that processing is conducted on the Nextion side,, this frees up space on the Uno.
4.3" settings screen redesign so the 2.8" and the 4.3" are more alike.