added comment block for description at start of file

not nessarily for the style guide, just helps since we probably won't touch it for a long time

Author: JasonElting

scan_rfid.py

@@ -1,4 +1,10 @@
-#!/usr/bin/env python3
+#!/usr/bin/env
+# WSU Team Projects 2
+#scan_rfid.py
+#This script is designed for use on a raspberry pi connected to the WSU_Secure network, and a M6E nano ThingMagic RFID reader
+#This script will read any RFID tags near the antenna and forward the information to the team21.cs.wright.edu under the
+#user drone with the password 36024pAbxHY
+#
 from __future__ import print_function
 import time
 import sys
@@ -29,6 +35,7 @@
 #reader.start_reading(lambda tag: print(tag.epc, tag.antenna, tag.read_count, tag.rssi))
 try:
     reader.start_reading(lambda tag: subprocess.call(['curl','-u',credentials,'-d',"tag="+tag.epc.decode("utf-8"),'-X','POST',post_url]))
+    # starts the reader and forwards info using curl to the server specified in 'post_url'
     time.sleep(runtime)
     reader.stop_reading()
     sys.exit()