diff --git a/localTest/local_mqtt_sub_without_ros.py b/localTest/local_mqtt_sub_without_ros.py
index 041526b..c9f393f 100644
--- a/localTest/local_mqtt_sub_without_ros.py
+++ b/localTest/local_mqtt_sub_without_ros.py
@@ -1,55 +1,36 @@
-#!/usr/bin/env python3
-#coding:utf-8
-# license removed for brevity
 import ssl
-import rospy
-from std_msgs.msg import String
+
 import paho.mqtt.client as mqtt
-import json
 
-mqtt_config = {"host": "192.168.0.48", "port": 1883, "topic": "data/pub"}
-# Ros
-def ros_pub(dataJson):
-    global publisher, rate
-    # data = json.loads(dataJson)
-    publisher.publish(dataJson)     #將date字串發布到topic
-    rate.sleep()
-    # print(f"publish data {data}")
+
+def on_connect(self, userdata, flags, rc):
+    print("Connected with result code " + str(rc))
+    client.subscribe(topic)
+
+
+def on_message(self, userdata, msg):
+    print(f"msg.topic {msg.payload.decode('utf-8')}")
 
 
-# MQTT
-def initialise_clients(clientname):
+def initialise_clients(cname):
     # callback assignment
-    initialise_client = mqtt.Client(clientname, False) 
-    initialise_client.topic_ack = []
+    initialise_client = mqtt.Client(cname, True)  # don't use clean session
     return initialise_client
 
-def on_connect(client, userdata, flags, rc):
-    print("Connected with result code " + str(rc))
-    client.subscribe(mqtt_config["topic"])
-
-
-def on_message(client, userdata, msg):
-    print(msg.payload.decode('utf-8'))
-    ros_pub(msg.payload.decode('utf-8'))
-
-if __name__ == '__main__':
-    # Mqtt
-    client = initialise_clients("nano")
-    client.on_connect = on_connect
-    client.on_message = on_message
-    client.connect(mqtt_config["host"], mqtt_config["port"], 60)
-    # client.loop_start()
-
-    # Ros
-    Mqtt_Node = 'publisher_py'
-    rospy.init_node(Mqtt_Node)
-    # initialize Ros node
-    topicName = 'mqtt_msg'
-    publisher = rospy.Publisher(topicName,String,queue_size=10)
-    rate = rospy.Rate(10)
-
-    client.loop_forever()
+
+host = "192.168.0.48"
+port = 1883
+topic = "data/pub"
+
+client = initialise_clients("python_sub")
+
+client.on_connect = on_connect
+
+client.on_message = on_message
+
+client.connect(host, port, 60)
+
+client.loop_forever()
 
 # mqtt connect code list
 # 0: Connection successful