@Solla-topee 

This is a brand new plug, so no need to reset.

The instantaneous wattage shown (1.75W) made sense for what I was measuring at the time. I am trying to measure standby/idle power for a lot of devices at home.

It looks like the issue is that the app reports today, past 7 days and past 30 days separately, but today is not part of total consumption.

I was using HomeAssistant to extract the data and look at it on my computer in a GUI. It reports "total consumption". But the data is incorrect. It is not an ever-increasing total. It appears to reset, either daily, or when the smartplug is unplugged and move to another outlet. It looks like a bug in HomeAssistant, and not an issue with the Kasa app, and probably not with firmware either.

Looks like I'm not the only one to have run into this with HomeAssistant . See : https://community.home-assistant.io/t/tp-link-kasa-kp115-total-energy-kwh-values-incorrect/319506

Re: the wording in the Kasa app, to me, the wording "past 7 days" and "past 30 days" in the English language do not clearly indicate that the current day is excluded. In fact, my reading was that they refer to the 7 (or 30) days that have elapsed, up to the current moment. But I'm not a grammar professor, or a native English speaker. If anything, the wording is ambiguous, because there is no adjective, and the words are not part of a sentence, which could help resolve the ambiguity. In the sentence, "For the past seven days, my smartplug has been monitoring energy", for example, today is explicitly included in the time period. I couldn't come up with a sentence including the words "past 7 days" that unambiguously excluded today. I think the wording "Previous 7 days" and "Previous 30 days" would unambigously exclude today. I believe the wording should be changed in the Kasa app.