I'm using PSU Control to turn my printer on and off using a tasmota-flashed smart plug and the "System Command" option in PSU Control with a couple of curl commands. Works much better than the relay I had tried to implement previously.
The plug has built-in monitoring for voltage, current and other calculated and aggregate values, and that can be fetched with a simple web request:
curl http://<ip address>/cm?cmnd=Status%208
I was just wondering if there's an existing plugin that can interrogate the plug and display the sensor values. It would be interesting to know how much current I'm drawing during a print, among other things. A cursory search didn't turn up anything obvious ...