As there is no app anymore for Wemo switches , i made 2 simple flows with an http request to switch it on or off. You first need to get the ip-address of the wemo by installing it via the wemo app.
Switch on the Wemo:
Method= POST
URL= http://xxx.xxx.x.xx:49153/upnp/control/basicevent1
Headers = Host: xxx.xxx.x.xx
Content-Type: text/xml; charset=“utf-8”
SOAPACTION: “urn:Belkin:service:basicevent:1#SetBinaryState”
Body=<?xml version="1.0" encoding="utf-8"?>
<s:Envelope xmlns:s=“http://schemas.xmlsoap.org/soap/envelope/” s:encodingStyle=“http://schemas.xmlsoap.org/soap/encoding/”>
<s:Body>
<u:SetBinaryState xmlns:u=“urn:Belkin:service:basicevent:1”>
1
</u:SetBinaryState>
</s:Body>
</s:Envelope>
xxx.xxx.x.xx = ip-address of the wemo
To switch it off put the SetBinaryState to 0 in the body
Maybe someone can use it 
