lib/sonos/discovery.rb
def discover
      result = SSDP::Consumer.new.search(service: 'urn:schemas-upnp-org:device:ZonePlayer:1', first_only: true, timeout: @timeout, filter: lambda {|r| r[:params]["ST"].match(/ZonePlayer/) })
      @first_device_ip = result[:address]
    end
def discover
      result = SSDP::Consumer.new.search(service: 'urn:schemas-upnp-org:device:ZonePlayer:1', first_only: true, timeout: @timeout, filter: lambda {|r| r[:params]["ST"].match(/ZonePlayer/) })
      @first_device_ip = result[:address]
    end
Look for Sonos devices on the network and return the first IP address found
 @return [String] the IP address of the first Sonos device found