They support WPA2 personal.

Tough to say from the description, but one thing to check is that the neutral wire (usually white) that you're using for the smart switch is from the output side of the GFIC - if you've used a...

@SDFrey The case here was for a fixture with a fan + light so there were two load wires, red & black, and neutral, plus the incoming (and sometimes outgoing power wires). If yours is the same and you...

@Solcany Development efforts on this kind of thing can take a long time for big companies, and that's assuming it'll ever hit the top of thier list... I do agree it's a bit silly but there's really...

@SimonC. Good job sticking with this, it must be frustrating! I have the older HS100 & HS110 and neither seem to have the issue, so it's not a general problem. Seems like it really can only be a few...

@WhiteRedHat Ok, that makes more sense. If you can unplug the KP303 and your network comes back up after a few minutes, then it's certainly a bug in the KP303 firmware - probably ARP flooding. If the...