lib/arduino_firmata/main.rb in arduino_firmata-0.2.7 vs lib/arduino_firmata/main.rb in arduino_firmata-0.2.8

@@ -4,10 +4,10 @@
     Dir.entries('/dev').grep(/tty\.?(usb|acm)/i).map{|fname| "/dev/#{fname}"}
   end
 
   def self.connect(serial_name=nil, params={}, &block)
     serial_name = self.list[0] unless serial_name
-
+    raise Error.new 'Arduino not found' unless serial_name
     Params.default.each do |k,v|
       params[k] = v unless params[k]
     end
 
     arduino = Arduino.new serial_name, params