diff --git a/ps_simulator.rb b/ps_simulator.rb
new file mode 100755
index 0000000..11b102b
--- /dev/null
+++ b/ps_simulator.rb
@@ -0,0 +1,35 @@
+#!/usr/bin/env ruby
+# encoding: utf-8
+# ruby: 1.9
+require 'serialport'
+require './telegram'
+
+pc_serial = SerialPort.open("/dev/ttyUSB0",{ baud: 57600, databits: 8, parity: SerialPort::ODD, stop_bit: 1, flow_control: SerialPort::NONE})
+
+# ensure serial settings (weird bug)
+pc_serial.baud = 57600
+pc_serial.parity = SerialPort::ODD
+
+while true
+  activities = IO.select([pc_serial])
+  activities[0].each do |activity|
+    data = activity.readpartial(16+1+5)
+    line = data.unpack("C*").collect { |b| sprintf("%02X ",b) }.join
+    if activity==pc_serial then
+      puts "> "+line
+      begin
+        telegram = Telegram.parse(data)
+        if telegram then
+          puts "> "+telegram.to_s[2..-1]
+        else
+		  raise "could not parse message"
+		end
+      rescue Exception => e
+        puts e.to_s
+      end
+    else
+      raise "unknown source"
+    end
+  end
+end
+