Remote display solutions experiences

[tobiasdroessler]

Looking for a solution to present the outside temperature from the same device kind in my flat without additional Infrastructure involved. Device are in Range.

Hardware could be the same or something else if existing.

solution with that same hardware.

"paring"could be done via firmware/ programming with no dedicated procedure

Should be possible by a software modification, right?
Anyone likes to help/mentoring me doing the first steps for that mod?

[tobiasdroessler]

Someone able to estimate the battery lifetime when the display device needs to listen on the radio interface all the time. That could be a problem ...