def prowl(message) {
   def params = [
     uri: "https://api.prowlapp.com",
     path: "/publicapi/add",
     query: [
       event: message,
       application: "Smartthings",
       url: "",
       description: "Power Outage Notification",
       apikey: "xxxxxxxxxxxxxxxxxxxxxxx"
     ]
   ]

   try {
     httpGet(params) { resp ->
       log.debug "Prowl message sent";
     }
   } catch(e) {
     log.error "Can't send Prowl message: $e"
   }
 }