diff --git a/script/local.py b/script/local.py
index 997d46a..101a482 100644
--- a/script/local.py
+++ b/script/local.py
@@ -188,3 +188,8 @@ def stop_viewer():
 def on_system_restart():   
     print ("restart")
     stop_pipeline()     
+
+
+def on_ctrl_cmd(cmd):   
+    print ("Control command: ", cmd)
+    pass