diff --git a/lppinstru/dlp_temp.py b/lppinstru/dlp_temp.py
old mode 100644
new mode 100755
--- a/lppinstru/dlp_temp.py
+++ b/lppinstru/dlp_temp.py
@@ -8,6 +8,7 @@ import os
 import matplotlib.pyplot as plt
 import numpy as np
 import serial
+import struct
 
 __author__ = "Alexis Jeandet"
 __copyright__ = "Copyright 2015, Laboratory of Plasma Physics"
@@ -43,12 +44,6 @@ class dlp_temp(object):
         self.i=0
         self.__port=serial.Serial(port,timeout=0.5)
 
-    def _byte_to_int(self,byte):
-        if byte >= 128:
-            return byte-256
-        else:
-            return byte
-
     def ping(self):
         self.__port.write(b"P")
         return b'Q' == self.__port.read(1)
@@ -57,8 +52,7 @@ class dlp_temp(object):
         if index < 3:
             self.__port.write(self.sensors.get(index))
             dat=self.__port.read(9)
-            test=( self._byte_to_int(dat[0]) + (self._byte_to_int(dat[1])*256) )
-            temp=float(test)*0.0625
+            temp=float(struct.unpack( "h", dat[:2])[0])*0.0625
             return temp #(temp-32.0)/1.8
         raise UserWarning("Parameter out of bound")
 
@@ -66,8 +60,7 @@ class dlp_temp(object):
         if index < 3:
             self.__port.write(self.aninputs.get(index))
             dat=self.__port.read(2)
-            test=( self._byte_to_int(dat[0]) + (self._byte_to_int(dat[1])*256) )
-            val=float(test)/512.0
+            val=float(struct.unpack( "h", dat[:2])[0])/512.0
             return val
         raise UserWarning("Parameter out of bound")
 
@@ -129,5 +122,18 @@ class dlp_temp(object):
     def GP4(self,value):
         return self.digit_out(2,value)
 
+
+def main(argv):
+    if len(argv)==4:
+        print(argv[3])
+    if len(argv)>=3:
+        dlp=dlp_temp(argv[0])
+        while(True):
+            readout=[dlp.read_sensor(i) for i in range(int(argv[1]))]
+            print("{date}\t{values}".format(date=time.strftime("%Y-%m-%dT%H:%M:%S"),values="\t".join([str(x) for x in readout] )))
+            time.sleep(float(argv[2]))
+
+
 if __name__ == '__main__':
-    print("")
+    print(sys.argv)
+    main(sys.argv[1:])