I've had this for years and it's been working fine, except for occasional times where "Device unreachable". It's been on for five hours, and just went off as scheduled. I went to turn it back on for a few minutes, and the "Device is unreachable". It's in the same place it's always been - eight feet from the router. I ended up deleteing it, hoping I could reinstall it (I got a new router - I thought that might have something to do with it). I tried adding it back, and "Unable to connect to your Smart Plug Wi-Fi. I checked for a firmware update, and "No updates available".

Same thing on my other smart plug, although it does turn on and off as sheduled.