sane.py

#!/bin/env python
import serial
from socket import socket, AF_INET, SOCK_STREAM

if __name__ == "__main__":
  sock = socket(AF_INET, SOCK_STREAM)
  sock.connect(('localhost',9090))

  sock.send('raw\r\n\r\n');

  port = serial.Serial('/dev/ttyACM0', 9600, timeout=1)
  line = port.readline() #skip the junk
  while True:
    line = port.readline()
    if line:
      usecs = int(line)
      sock.send('\x00{"receiver":"\/echoTime","msg":{"data":%d},"type":"std_msgs\/Int64"}\xff/' % (usecs,))