I updated this to be compatible with the latest event machine

.gitignore

@@ -2,3 +2,6 @@
 .bundle
 Gemfile.lock
 pkg/*
+
+.idea/*
+em-serialport.iml

.ruby-gemset

@@ -0,0 +1 @@
+em-serial

.ruby-version

@@ -0,0 +1 @@
+2.1.0

em-serialport.gemspec

@@ -18,6 +18,6 @@ Gem::Specification.new do |s|
   s.executables   = ['serial-monitor']
   s.require_paths = ["lib"]
 
-  s.add_dependency "eventmachine", "0.12.10"
+  s.add_dependency "eventmachine"
   s.add_dependency "serialport"
 end

lib/em-serialport.rb

@@ -1,5 +1,5 @@
-$eventmachine_library = :pure_ruby
 require 'eventmachine'
+require 'em/pure_ruby'
 require 'serialport'
 
 %w(serial_port connection).each do |file|

lib/em-serialport/version.rb

@@ -1,5 +1,5 @@
 module Em
   module Serialport
-    VERSION = "0.0.2"
+    VERSION = "0.0.3"
   end
 end

readme.md

@@ -25,7 +25,7 @@ The gem comes with a simple command line Serial Monitor. Launch it as:
 
     bundle exec serial-monitor /dev/tty.usbserial-xxxxxxxx
 
-Here is a working example, tested with an [https://github.com/railsbob/arduino-examples/tree/master/echo_server](arduino echo server). It simply reads and writes data to serial port from command line.
+Here is a working example, tested with [arduino echo server](https://github.com/railsbob/arduino-examples/tree/master/echo_server). It simply reads and writes data to serial port from command line.
 
     Serial monitor initialized. Enter data followed by a newline character.
     Ctrl-C to stop
@@ -36,4 +36,4 @@ Here is a working example, tested with an [https://github.com/railsbob/arduino-e
     received: ery long
     received:  sentence
 
-
+