diff --git a/README.md b/README.md
index 251bdb3..21d2686 100644
--- a/README.md
+++ b/README.md
@@ -40,6 +40,7 @@ Provide the target IP using `-t` and a command to send using either `-c` or `-j`
 | antitheft | Lists configured antitheft rules     |
 | reboot    | Reboot the device                    |
 | reset     | Reset the device to factory settings |
+| energy    | Return realtime voltage/current/power|
 
 More advanced commands such as creating or editing rules can be issued using the `-j` flag by providing the full JSON string for the command. Please consult [tplink-smarthome-commands.txt](tplink-smarthome-commands.txt) for a comprehensive list of commands.
 
diff --git a/tplink-smartplug.py b/tplink-smartplug.py
index 3a2fde8..b42c232 100644
--- a/tplink-smartplug.py
+++ b/tplink-smartplug.py
@@ -21,6 +21,7 @@
 #
 import socket
 import argparse
+from struct import pack
 
 version = 0.1
 
@@ -44,14 +45,15 @@ commands = {'info'     : '{"system":{"get_sysinfo":{}}}',
 			'countdown': '{"count_down":{"get_rules":{}}}',
 			'antitheft': '{"anti_theft":{"get_rules":{}}}',
 			'reboot'   : '{"system":{"reboot":{"delay":1}}}',
-			'reset'    : '{"system":{"reset":{"delay":1}}}'
+			'reset'    : '{"system":{"reset":{"delay":1}}}',
+			'energy'   : '{"emeter":{"get_realtime":{}}}'
 }
 
 # Encryption and Decryption of TP-Link Smart Home Protocol
 # XOR Autokey Cipher with starting key = 171
 def encrypt(string):
 	key = 171
-	result = "\0\0\0\0"
+	result = pack('>I', len(string))
 	for i in string: 
 		a = key ^ ord(i)
 		key = a