update readme

README.md

@@ -1,3 +1,61 @@
 # pyzk
 
-Unofficial library of zksoftware the fingerprint attendance machine.
+pyzk is unofficial library of zksoftware the fingerprint attendance machine. 
+
+# Ussage
+
+The usage is very simple, just Create new ZK instance and you will ready to call api.
+
+* Basic Ussage
+```
+import zk
+
+zk = zk.ZK(ip='192.168.1.201', port=4370, timeout=5)
+try:
+    zk.connect()
+    # disable (lock) the device, make sure not activity when process run
+    zk.disable_device()
+
+    # Do another task here
+    firmware = zk.get_firmware_version()
+    print 'Firmware Version: : {}'.format(firmware.get('data'))
+
+    # don't forget to re-enable device
+    zk.enable_device()
+except Exception, e:
+    print "Process terminate : {}".format(e)
+finally:
+    if zk.is_connect:
+        zk.disconnect()
+
+```
+
+* Ger Firmware Version
+
+```
+zk.get_firmware_version()
+```
+
+* Create User
+
+```
+zk.set_user(uid=1, name='Fanani M. Ihsan', privilege=const.USER_ADMIN, password='12345678', group_id='', user_id='123')
+```
+
+* Test voice
+
+```
+zk.test_voice()
+```
+
+* Shutdown Device
+
+```
+zk.power_off()
+```
+
+* Restart
+
+```
+zk.restart()
+```