Add nanopb (https://github.com/metormote/nanopb) and generate example protocol buffer for beerduino (https://github.com/ilyevsky/beerduino)

server.py

@@ -0,0 +1,35 @@
+#!/usr/bin/python
+
+import serial
+import sys
+
+import beerduino_pb2
+
+def main(argv):
+  if len(argv) < 2:
+    print 'Usage: server.py /dev/serial'
+    return
+
+  ard_serial = serial.Serial(argv[1], 9600)
+  print ard_serial.readline()
+
+  ping_msg = beerduino_pb2.Ping()
+  ping_msg.id = 123
+
+  data = ping_msg.SerializeToString()
+  ard_serial.write('' + chr(len(data)))
+  print 'Writing %d bytes to serial.' % len(data)
+  ard_serial.write(data)
+
+  echo_msg = beerduino_pb2.Echo()
+  msg_len = ard_serial.read(size=1)
+  print 'Reading %d bytes from serial.' % ord(msg_len)
+  echo_msg.ParseFromString(ard_serial.read(ord(msg_len)))
+
+  str = 'Received Echo with id: %d.' % echo_msg.id
+  if echo_msg.HasField('message'):
+    print str + ' Message: %s' % echo_msg.message
+
+
+if __name__ == '__main__':
+  main(sys.argv)