118
IKEA's new smart plug to track power consumption could launch soon
(www.notebookcheck.net)
Home Assistant is open source home automation that puts local control and privacy first. Powered by a worldwide community of tinkerers and DIY enthusiasts. Perfect to run on a Raspberry Pi or a local server. Available for free at home-assistant.io
I'm not the person who you're responding to, but at least in my case I am just not comfortable with having the ability to switch, since I would like to connect devices which could be seriously damaged if the switch toggled for any reason. I have modified a couple of switchable power monitoring plugs already, but I would rather pay slightly less and not have a hassle.
With Tasmota on the S31, you can disable the ability to turn it off. I have a few set up that way to prevent them from being turned off.