diff --git a/run.py b/run.py
index 6bc6886..ec3fb79 100755
--- a/run.py
+++ b/run.py
@@ -461,7 +461,8 @@ def get_sensors():
     global mbconn
     global sensors
     #print("Reading sensors")
-    mbconn.open()
+    if not mbconn.is_open:
+        mbconn.open()
     """
     port 1: 256
     port 2: 272
@@ -488,7 +489,7 @@ def get_sensors():
         out = [0, 0, 0, 0]
 
     #fprint("Values: " + str(sensors))
-    mbconn.close()
+    #mbconn.close()
     for x in range(len(sensors)):
         if sensors[x] >= 180: # 3 sec
             # cable newly detected on tray