Toggle all WeMo switches. If it is on, it will turn off. If it is off, it will turn on. Just a quick little thing.

wemo.go

package main

import (
	"fmt"
	"github.com/huin/goupnp"
	"github.com/huin/goupnp/soap"
)

func main() {
	devices, err := goupnp.DiscoverDevices("urn:Belkin:device:controllee")
	if err != nil {
		fmt.Println("Error while discovering devices: ", err)
		return
	}
	fmt.Println("Devices: ", len(devices))
	if len(devices) > 0 {
		for _, device := range devices {
			services := device.Root.Device.FindService("urn:Belkin:service:basicevent:1")
			fmt.Println("Services: ", len(services))
			if len(services) > 0 {
				for _, service := range services {
					soapClient := service.NewSOAPClient()
					stateObj := &struct {
						BinaryState string
					}{}
					if err := soapClient.PerformAction("urn:Belkin:service:basicevent:1", "GetBinaryState", stateObj, stateObj); err != nil {
						fmt.Println("Error while performing action: ", err)
						return
					}
					CurrentState, err := soap.UnmarshalBoolean(stateObj.BinaryState)
					if err != nil {
						fmt.Println("Error while unmarshaling BinaryState: ", err)
						return
					}
					fmt.Println("CurrentState: ", stateObj.BinaryState)
					NewState, err := soap.MarshalBoolean(!CurrentState)
					if err != nil {
						fmt.Println("Error while marshaling BinaryState: ", err)
						return
					}
					fmt.Println("NewState: ", NewState)
					stateObj.BinaryState = NewState
					if err := soapClient.PerformAction("urn:Belkin:service:basicevent:1", "SetBinaryState", stateObj, stateObj); err != nil {
						fmt.Println("Error while performing action: ", err)
						return
					}
				}
			}
		}
	} else {
		fmt.Println("No WeMo Switch Devices Found!")
		return
	}
}