Hi,

yes, I have found a solution. The developer helped me out.
It is very simple. Just keep the “” away from the page number. (Somehow it is %22 in my post above.)
Just open a browser and enter

http://ip:8080/remote?action=NOTIFICATION& notification=PAGE_CHANGED&payload=1

Please remove the space between NOTIFICATION& and notification. The text is written wrong if I put it together.

0 is page one. 1 page two and so on.

As an alternative you can try

http://ip:8080/remote?action=NOTIFICATION& notification=PAGE_DECREMENT

or PAGE_INCREMENT

I use these commands to control the mirror using my smart home gesture control.
Thats why I had no need to modify the remote control module.

Hope it helps you anyway.
In my case, it works like a charm.