Re:Smart homes will turn dumb overnight as Charter kills sec...
by bmgxyz on Saturday January 18, 2020 @10:26AM
(#22084904)
Sonoff devices don't do this out of the box, but with some basic equipment you can flash [open source firmware][1] on them and make them work even better than stock, and no packets leave the LAN.
[1]: https://github.com/arendst/Tasmota