Displaying changing data on multiple screen

How-to
1

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Description

I have data coming over the serial port in the loop function. I want to display some of this changing data on one screen and the other changing data on the other screen.
I jump between screens using a button on the main screen for each screen. Main screen selecting tow other screens…

What MCU/Processor/Board and compiler are you using?

ESP32-S3 custom 5 inch 16bit RGB display. Arduino IDE

What LVGL version are you using?

LVGL 8.4

What do you want to achieve?

Display live changing data from the serial port on both screens when I select them.

What have you tried so far?

Getting the active screen and sending data to a label on the screen. I need to find out how to get the active screen and write to the label on this screen when I move to the screen via a button press to open this screen…
An example would be very helpful.

Code to reproduce

My current code is very long and just looking for a simple example on how to do what I need.
Add a code snippet which can run in the simulator. It should contain only the relevant code that compiles without errors when separated from your main code base.

The code block(s) should be formatted like:

/*You code here*/

Screenshot and/or video

If possible, add screenshots and/or videos about the current state.

2

Primary conditions = both screens and objects must exist and pointer be global. To get the active screen, use lv_scr_act() .

if( lv_scr_act() == pointerSCR1 ) ...

with animated screen switch more special code required to preupdate labels on new screen…

1 Like
3

Marian_M
Thanks very much for your help. Fixed the issue in 2 minutes.
Now I can sleep tonight.
Dave

1 Like
4

Hello. Can you tell me which points need to be updated when switching to another page? I just did the callback processing of the buttons, and when I go to another page via lv_menu_set_page, they work out the callback of the buttons on the previous page. The documentation says that it is necessary to clean up the flags, but there was nothing about the keyboard.

I also tried using lv_group_focus_next and then it tries to do something, but only once. (I switched to the page on enter and switched the focus of the group, as a result, he played the old callback every time). That is, in any case, the old callback is being worked out from the start page.