diff --git a/smarttv.py b/smarttv.py
index a46091a..9b16b91 100644
--- a/smarttv.py
+++ b/smarttv.py
@@ -2,12 +2,30 @@ import serial
 import time
 import sys
 
-# Define the serial port
+# Serial configurations
 SERIAL_PORT = '/dev/ttyUSB0'
-
-# Define the baud rate
 BAUD_RATE = 19200
 
+USAGE_INFO = "Usage: python3 smarttv.py [power_on|power_off|get_state|get_volume|set_volume=volume|get_mute|mute|unmute|get_input|set_input_hdmi|set_input_ops]"
+
+USAGE_INF = """
+Usage: python3 smarttv.py [command]
+
+Commands:
+  power_on            - Turn the smart TV on
+  power_off           - Turn the smart TV off
+  get_state           - Get the power state of the smart TV
+  get_volume          - Get the current volume level of the smart TV
+  set_volume=volume   - Set the volume level of the smart TV (0-100)
+  get_mute            - Check if the smart TV is muted
+  mute                - Mute the smart TV
+  unmute              - Unmute the smart TV
+  get_input           - Get the current input source of the smart TV
+  set_input_hdmi      - Set the input source to HDMI
+  set_input_ops       - Set the input source to OPS/HDMI2
+  help                - Display help information
+"""
+
 # Define commands
 SMARTTV_HELP = b'?\r'
 SMARTTV_ON = b'on\r'
@@ -23,6 +41,14 @@ SMARTTV_GET_INPUT = b'get input\r'
 SMARTTV_SET_INPUT_HDMI = b'set input=hdmi1\r'
 SMARTTV_SET_INPUT_OPS= b'set input=ops/hdmi2\r'
 
+## MQTT
+MQTT_IP = "locahost"
+MQTT_PORT = 1883
+MQTT_USERNAME = "username"
+MQTT_PASSWORD = "password"
+MQTT_TOPIC_CMD = "smarttv/cmd"
+MQTT_TOPIC_STATUS = "smarttv/status"
+
 # Function to send command to TV
 def send_command(command):
     with serial.Serial(SERIAL_PORT, BAUD_RATE, timeout=1) as ser:
@@ -33,7 +59,7 @@ def send_command(command):
 
 if __name__ == "__main__":
     if len(sys.argv) != 2:
-        print("Usage: python3 smarttv.py [power_on|power_off|get_volume|set_volume=volume]")
+        print(USAGE_INFO)
         sys.exit(1)
 
     command = sys.argv[1]
@@ -47,7 +73,10 @@ if __name__ == "__main__":
             print("Volume must be between 0 and 100")
             sys.exit(1)
         volume_command = SMARTTV_SET_VOLUME % volume
-        print(send_command(volume_command))
+        response = send_command(volume_command)
+        if "olume=" in response:
+            volume_level = response.split('=')[1].rstrip('>').strip()
+            print('{"volume":' + volume_level + '}')
         sys.exit(0)
 
     if command == "help":
@@ -73,7 +102,12 @@ if __name__ == "__main__":
         print(send_command(SMARTTV_GET_STATE))
 
     elif command == "get_volume":
-        print(send_command(SMARTTV_GET_VOLUME))
+        response = send_command(SMARTTV_GET_VOLUME)
+        if "olume=" in response:
+            volume_level = response.split('=')[1].rstrip('>').strip()
+            print('{"volume":' + volume_level + '}')
+        else:
+            print(response)
 
     elif command == "get_mute":
         response = send_command(SMARTTV_GET_MUTE)
@@ -94,6 +128,7 @@ if __name__ == "__main__":
             print(response)
         
     elif command == "unmute":
+        response = send_command(SMARTTV_UNMUTE)
         if "ute=off" in response:
             print('{"mute":"off"}')
         elif "ute=on" in response:
@@ -117,7 +152,6 @@ if __name__ == "__main__":
         if "nput=ops/hdmi2" in response:
             print("OPS")
         elif "nput=hdmi1" in response:
-            # print("HDMI")
             print('{"input":"HDMI"}')
         else:
             print(send_command(SMARTTV_GET_INPUT))
@@ -137,5 +171,5 @@ if __name__ == "__main__":
             print(send_command(SMARTTV_SET_INPUT_OPS))
 
     else:
-        print("Invalid command. Usage: python3 smarttv.py [power_on|power_off|get_volume|set_volume=volume]")
+        print("Invalid command.", USAGE_INFO)
         sys.exit(1)
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