Feature request: remote display

[mek]

It would be cool if

• two sensors can be paired with each other to show the remote value.
  like place one display outside (showing its own temperature) but also have an other one inside to show the outside temperature

and / or

• use it as a remote display
  being able to remote control what is shown on the display.
  like being able to use some script to show whatever should be shown on the display,
  one usecase could be to use some home automation software like domoticz, home assistant, ...
  and show some value there, if its the outside or whatever measured temperature or other numerical / hex value.