#!/usr/bin/env python

import sys, os, serial, time

def main():
   # open the port and send the commands to receive data
   ser2=serial.Serial('/dev/ttyS2', 9600, timeout=5)
   ser2.write('R')
   line=ser2.read(100)
   ser2.write('S')
   line=ser2.read(100)

   file = "/root/databuoy/SPN1/%s_SPN1.dat" % (time.strftime("%Y%m%d", time.gmtime()))
   # open the file - append if already exists
   FILE = open(file,"a")
   # obtain the time from the PC 
   FILE.write("%s %s\n" % (time.strftime("%d/%m/%Y, %H:%M:%S,", time.gmtime()), line))
   FILE.close()
   
   sys.exit(0)
   
if __name__ == '__main__':
   main()