It drives me crazy! The oldest part of the house pre-dates 1650 and was built to last. I have 4 wifi points hard-wired in as wifi will only reach the next room.

On the plus side, it's cool in summer and warm in winter ;)

I've got a few of these with 2xAAA, Arduino pro + radio + DS18b20 crammed into them

Vented Box

@mvdarend has my vote though... much cheaper and fun