command.rb in milight-v6-0.1.1

- old
+ new

@@ -1,12 +1,13 @@
 # frozen_string_literal: true
 
+require "milight/v6/exception"
 require "milight/v6/socket"
 
 module Milight
   module V6
-    # see http://www.limitlessled.com/dev/
+    # see https://github.com/Fantasmos/LimitlessLED-DevAPI
     class Command
       def initialize(host, port = 5987)
         @socket = Milight::V6::Socket.new(host, port)
 
         bridge_session
@@ -80,9 +81,11 @@
                    0xED, 0xA3, 0x01, 0xAE, 0x08, 0x2D, 0x46, 0x61, 0x41,
                    0xA7, 0xF6, 0xDC, 0xAF, 0xD3, 0xE6, 0x00, 0x00, 0x1E]
 
         @socket.send_bytes(request)
         response = @socket.receive_bytes
+
+        raise Exception, "Could not establish session with Wifi bridge." unless response
 
         @session_id1 = response[19]
         @session_id2 = response[20]
       end
 