import serial
import time
import string
ser = serial.Serial('COM5', 9600)
ser.write('1')
ser.write('\r\n')
time.sleep(10);
k = ""
l = open("SpectrometerData1.dat","a+b")
open('SpectrometerData1.dat', 'w').close()
l.write('$\r\n')
while (k) != "$\r\n" :
    if (string.find(k, "$") == -1):
        #print string.find(k, '$')
        l.write(k);
    #else:
        #print string.find(k, "$")
        #print k
    k = ser.readline()
#print("k=$!")