UPDATE: TP-Link have provided me updated firmware that significantly reduces the extraneous messages when the switch is OFF but does not remove them when the switch is ON. They are still working on it.

  @BrianMal 

Just installed a couple of these switches and I'm seeing the same issue.  Did they give you the impression that this was something they could fix?

  @Amuzing 

When I first installed these switches, they would blink and send messages several times a minute when OFF and every hour or so when ON. I contacted TP-Link and, a couple od days later, they provided new firmware that fixed 99% of the OFF messages but did not address the rarer ON messages. I just received a second update in the last hour which I have just finished installing but since the ON messages are rarer, I will not know until tomorrow morning if they are fixed. However, if you use the Tapo App to update the firmware, this newer version is the one you should get. The version is 1.0.4 Build 250124 Rel.181840

FYI: My Home Assistant did not find the switch after I installed the new firmware and I had to delete it and re-add it.

Brian

  @BrianMal 

Sounds good.  I filed a ticket for this issue as well. If/when they send me a fw update to try, I'll run the same test with Home Assistant and report back.

  @Amuzing 

No luck. The new firmware did not help the issue. I have notified them. 

FYI. It looks like TP-link is located in Hong Kong area and will probably be off for a few days for Chinese New Year.

Brian