Hey, Not much news this evening but after quite a bit of digging and trying many many combinations of commands from the HS110 API I think I can conclude that the {'error_code': -1} is caused by invalid syntax in the request field of the api call Hope this helped (Sorry if you’d already worked this out)
Power draw by different models of Smart plugs · bramstroker homeassistant-powercalc · Discussion #330 · GitHub
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