diff --git a/cbpi/extension/gpioactor/__init__.py b/cbpi/extension/gpioactor/__init__.py
index 50a15ae..ae8104f 100644
--- a/cbpi/extension/gpioactor/__init__.py
+++ b/cbpi/extension/gpioactor/__init__.py
@@ -20,17 +20,17 @@ except Exception:
     import RPi.GPIO as GPIO
 
 
-@parameters([Property.Select(label="GPIO", options=[0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27]), Property.Select(label="Inverted", options=["Yes", "No"])])
+@parameters([Property.Select(label="GPIO", options=[0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27]), Property.Select(label="Inverted", options=["Yes", "No"],description="No: Active on high; Yes: Active on low")])
 class GPIOActor(CBPiActor):
 
     
     def get_GPIO_state(self, state):
         # ON
         if state == 1:
-            return 0 if self.inverted == False else 1
+            return 1 if self.inverted == False else 0
         # OFF
         if state == 0:
-            return 1 if self.inverted == False else 0
+            return 0 if self.inverted == False else 1
 
     async def start(self):
         await super().start()