Wk30

Connection~

Vcc - 3.3V
TX - RX
RX - TX
GND - GND
GPIO0 - GND

Additional Information~

This device is available on Amazon as "Smart WiFi Plug Outlet Mini with Energy Monitoring." The product number, WK30 appears nowhere on the page on Amazon, so here's its ASIN: B07C326VKR

It remains to be seen if this device actually features energy monitoring as in the title on Amazon.

Nicely labeled holes for a header exist. The pictures below are with a header soldered on. All that was needed was to jumper GPIO0 to ground in addition to the usual connections. Once tasmota is up, configure the device as generic.

Device Images~

GPIO Config~

This has the LEDs, GPIO4 and GPIO5 separated out as different relays so they can be controlled independently of the switch.