TP-Link has a set of interesting WiFi smart plugs -- the HS100 which provides remote access and control for a power plug, and HS110 which is essentially HS100 but with energy monitoring.

tplinkhs110 is a Go library for accessing these smart plugs, based on the information available above. I have tested them out with a HS110 only and it works perfectly fine. An example of how to use this library is:

package main

import (
	"fmt"
	"github.com/shirdonl/tplinkhs110"
)

func main() {
	plug := tplinkhs110.Hs1xxPlug{IPAddress: "192.168.0.196"}
	results, err := plug.MeterInfo()
	if err != nil {
		fmt.Println("err:", err)
	}
	fmt.Println(results)

}

The results printed (after cleaning up):

{
	"emeter": {
		"get_realtime": {
			"current": 0.015135,
			"voltage": 296.213416,
			"power": 1.193017,
			"total": 0.061,
			"err_code": 0
		},
		"get_vgain_igain": {
			"vgain": 16566,
			"igain": 13042,
			"err_code": 0
		}
	}
}

Functions include:

• TurnOn() -- turning on the power on the plug
• TurnOff() -- turning off the power on the plug
• SystemInfo() -- getting information on the plug
• MeterInfo() -- metering info on the plug, including the current, voltage, power and the total power consumption till date, as well as the vgain and igain
• DailyStats(month, year) -- energy consumed per day for the given month and year