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There is - it’s called the X10 Home Automation system. It’s archaic technology from the 1970s and it doesn’t do power monitoring, but you sure can turn devices

There is - it’s called the X10 Home Automation system. It’s archaic technology from the 1970s and it doesn’t do power monitoring, but you sure can turn devices on and off. EDIT: it seems the KNX standard is a more modern system that supports Powerline as well as other communication methods, although it seems to mostly be for business use.

PaulHoule 3y ago
Both the X10 and powerline are large and expensive devices because they require a big transformer to interface with the power line, any device like that is going to be more expensive than a ZigBee device.