diff --git a/mypalletizer_260/mypalletizer_260_pi/launch/detect_marker_with_topic.launch b/mypalletizer_260/mypalletizer_260_pi/launch/detect_marker_with_topic.launch
index 75c61b8..c9470d0 100644
--- a/mypalletizer_260/mypalletizer_260_pi/launch/detect_marker_with_topic.launch
+++ b/mypalletizer_260/mypalletizer_260_pi/launch/detect_marker_with_topic.launch
@@ -1,6 +1,6 @@
 <launch>
 	<!-- Select connecting device and serial port ，选择连接设备及串口-->
-	<arg name="port" default="/dev/ttyUSB0" />
+	<arg name="port" default="/dev/ttyAMA0" />
 	<arg name="baud" default="115200" />
 	
 	<!-- Load file model ，加载文件模型-->
diff --git a/mypalletizer_260/mypalletizer_260_pi/launch/simple_gui.launch b/mypalletizer_260/mypalletizer_260_pi/launch/simple_gui.launch
index 09ea24b..b45e0eb 100644
--- a/mypalletizer_260/mypalletizer_260_pi/launch/simple_gui.launch
+++ b/mypalletizer_260/mypalletizer_260_pi/launch/simple_gui.launch
@@ -1,7 +1,7 @@
 <launch>
 	<!-- Select connecting device and serial port ，选择连接设备及串口-->
-	<arg name="port" default="/dev/ttyUSB0" />
-	<arg name="baud" default="115200" />
+	<arg name="port" default="/dev/ttyAMA0" />
+	<arg name="baud" default="1000000" />
 	<!-- Load file model ，加载文件模型-->
 	<arg name="model" default="$(find mycobot_description)/urdf/260_pi/mypal_260_pi.urdf"/>
 	<arg name="rvizconfig" default="$(find mypalletizer_260_pi)/config/mypal_260_pi.rviz" />
diff --git a/mypalletizer_260/mypalletizer_260_pi/launch/slider_control.launch b/mypalletizer_260/mypalletizer_260_pi/launch/slider_control.launch
index 3390174..62e061c 100644
--- a/mypalletizer_260/mypalletizer_260_pi/launch/slider_control.launch
+++ b/mypalletizer_260/mypalletizer_260_pi/launch/slider_control.launch
@@ -1,6 +1,6 @@
 <launch>
-	<!-- <arg name="port" default="/dev/ttyUSB0" />
-	<arg name="baud" default="115200" /> -->
+	<!-- <arg name="port" default="/dev/ttyAMA0" />
+	<arg name="baud" default="1000000" /> -->
 	
 	<!-- Load file model ，加载文件模型-->
 	<arg name="model" default="$(find mycobot_description)/urdf/260_pi/mypal_260_pi.urdf"/>
diff --git a/mypalletizer_260/mypalletizer_260_pi/launch/teleop_keyboard.launch b/mypalletizer_260/mypalletizer_260_pi/launch/teleop_keyboard.launch
index fcc918c..7bbd539 100644
--- a/mypalletizer_260/mypalletizer_260_pi/launch/teleop_keyboard.launch
+++ b/mypalletizer_260/mypalletizer_260_pi/launch/teleop_keyboard.launch
@@ -1,7 +1,7 @@
 <launch>
 	<!-- Select connecting device and serial port ，选择连接设备及串口-->
-	<arg name="port" default="/dev/ttyUSB0" />
-	<arg name="baud" default="115200" />
+	<arg name="port" default="/dev/ttyAMA0" />
+	<arg name="baud" default="1000000" />
 
 	<!-- Load file model ，加载文件模型-->
 	<!-- <arg name="model" default="$(find mycobot_description)/urdf/260_urdf/mycobot_urdf.urdf"/>