diff --git a/CHANGELOG.md b/CHANGELOG.md
index 98e4f2b..5f32892 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # ChangeLog for pymycobot
 
+## v2.9.5(2022-9-13)
+
+- release v2.9.5
+- Add MyBuddy serial open(),is_open() function
+- Add MyBuddy example
+
 ## v2.9.4 (2022-9-8)
 
 - release v2.9.4
diff --git a/pymycobot/Interface.py b/pymycobot/Interface.py
index cc33793..9565e2e 100644
--- a/pymycobot/Interface.py
+++ b/pymycobot/Interface.py
@@ -1125,4 +1125,4 @@ def set_encoders_drag(self, id, encoders, speeds):
     
     # def init_iic(self):
     #     from smbus2 import SMBus
-    #     i2c = SMBus(1)   # 1 代表 /dev/i2c-1
+    #     i2c = SMBus(1)   # 1 代表 /dev/i2c-1
\ No newline at end of file
diff --git a/pymycobot/__init__.py b/pymycobot/__init__.py
index a8536e5..e593895 100644
--- a/pymycobot/__init__.py
+++ b/pymycobot/__init__.py
@@ -30,7 +30,7 @@
     "Mira"
 ]
 
-__version__ = "2.9.4-beta-0.2"
+__version__ = "2.9.5"
 __author__ = "Elephantrobotics"
 __email__ = "weiquan.xu@elephantrobotics.com"
 __git_url__ = "https://github.com/elephantrobotics/pymycobot"
diff --git a/pymycobot/mybuddy.py b/pymycobot/mybuddy.py
index 6332fa4..598319f 100644
--- a/pymycobot/mybuddy.py
+++ b/pymycobot/mybuddy.py
@@ -375,4 +375,10 @@ def wait(self, t):
         return self
 
     def close(self):
-        self._serial_port.close()
+        self._serial_port.close()   
+            
+    def open(self):
+        self._serial_port.open()
+        
+    def is_open(self):
+        return self._serial_port.isOpen()