diff --git a/mecharm/mecharm_communication/launch/communication_topic.launch b/mecharm/mecharm_communication/launch/communication_topic.launch
index 45226f6..2c6d8b6 100644
--- a/mecharm/mecharm_communication/launch/communication_topic.launch
+++ b/mecharm/mecharm_communication/launch/communication_topic.launch
@@ -1,7 +1,9 @@
 <launch>
 	<!-- Select connecting device and serial port ，选择连接设备及串口-->
-	<arg name="port" default="/dev/ttyAMA0" />
-	<arg name="baud" default="1000000" />
+	<!-- <arg name="port" default="/dev/ttyAMA0" />
+	<arg name="baud" default="1000000" /> -->
+	<arg name="port" default="/dev/ttyUSB0" />
+	<arg name="baud" default="115200" />
 
 	<!-- Open communication service，开启通讯服务 -->
 	<node name="mecharm_services" pkg="mecharm_communication" type="mecharm_topics.py" output="screen">