HS300s No Longer Responding

[kevin1]

I rolled two topics together because they are discussing the same thing - HS300s that are visible in Kasa but not in Sense-land. Three possible issues affecting you:

1. Sometimes it can take a while (a day or so) for smart-plug discovery.
2. Mesh networks that reconfigure themselves and networks that repress subnet broadcasts can prevent Sense from seeing the smart plugs
3. You’re also probably close to or over the Sense limit of 20 smart outlets per Sense if you have 4 HS300s (6 outlets x 4 HS400s = 24 - over the limit). That can cause issues.

If you know your networking, this might be helpful. Kasa uses a different approach to talk to the HS300s.

Smart plug power data glitches

TPLink and Wemo work differently on the network. Wemo uses a separate HTTP transaction to fetch the current wattage. This is slow and generally an extremely inefficient way to get the ~16 bytes of information which we actually need. Having to do this every few seconds contributes to the overall latency of your network and can definitely saturate Sense’s wifi connection with enough plugs. TPLink has two ways to fetch the current wattage: TCP, UDP unicast and UDP broadcast. UDP broadcast is t…