Simple Digital Signage mode pi4 setup that shows an external web page on the TV attached. OLDER SETUP RECOMMNED TO USE THE WAYLAND using pagepi > Wayland-pagepi
Remote setup on ssh server enabled new install of Raspberry Pi OS: https://youtu.be/mfGwRGGV6Yw
By default the page refreshes every 15 minutes by keyboard simulation refresh. It does not use Wayland it changes back to X Server since some of the older tools used in the script like xdotool and unclutter don't work in Wayland.
Pagepi setup showing a popular financial charts website:
3UP portait mode PagePi
Do the Pagepi install following the youtube above. Then download and run the 3up script in this repo. https://github.com/ugotapi/pagepi/blob/main/mods/3up-portrait.sh
Reboot to get a three page portait setting Digital Signage. Change specific web pages displayed afterwards by editing 3up-portrait.sh file or the myscript.sh file under the user profile on the Raspberry Pi.