As mentioned by upon_drumhead (<a href="https://news.ycombinator.com/item?id=36841141">https://news.ycombinator.com/item?id=36841141</a>) there are much better devices for this job.<p>I'd recommend anyone looking for this sort of device to check out the devices on this list here (just the Energy Meters section) <a href="https://sigrok.org/wiki/Supported_hardware#Energy_meters" rel="nofollow noreferrer">https://sigrok.org/wiki/Supported_hardware#Energy_meters</a><p>Sigrok support will ensure you have a well supported open specification device that already has alternative software available in case whatever software is bundled with the device turns out to be substandard or eventually unsupported.