HS110 emulation software would go along great with an esp8266/esp32 and an inexpensive current monitoring device such as a PZEM-004T. Even if it’s not possible to run it off an esp device, one could create an power monitoring plug with an esp device running esphome connected to a PZEM-004T, report to HA and have your software send the data to sense. Awesome. I’ll have to look into your code tomorrow. I have a PZEM-004T and just received more esp8266 NodeMCUs to play with.