yup that one is rather vital…along with a lot of other things, like valves, pumps, heating system…
For the past 12 years they’ve all broken down at least once, but a router is much easier and quickly replaced than an internal valve or distribution pump! And the wifi has never failed longer than a hard reset. My ISP though did have some screw ups which is one of the reasons I want this running local. So ‘no wifi’ is literally the least of my worries.
Its wise though to have ‘spare parts’ lying around. Which include a couple of wemos units, an additional rpi and router.
And its also the reason I have this running in the summer, so I can test, test and test.