diff --git a/cubesatsim/cubesatsim.ino b/cubesatsim/cubesatsim.ino
index fc915953..bbecd40e 100644
--- a/cubesatsim/cubesatsim.ino
+++ b/cubesatsim/cubesatsim.ino
@@ -3071,6 +3071,8 @@ void payload_OK_only()
     } 
    }    
   }
+	
+  Serial2.print("b");	
 
   if (Serial2.available() > 0) {