diff --git a/test_tube_scanner/.env.example b/test_tube_scanner/.env.example
index a212b9b..f489e44 100644
--- a/test_tube_scanner/.env.example
+++ b/test_tube_scanner/.env.example
@@ -2,6 +2,7 @@
 # django app
 DEBUG=True
 IS_LOGGING=True
+GRBL_SIMULATION = False
 
 # app
 DJANGO_APP=Test Tube Scanner
diff --git a/test_tube_scanner/home/settings.py b/test_tube_scanner/home/settings.py
index 5e96b1e..d0d6626 100644
--- a/test_tube_scanner/home/settings.py
+++ b/test_tube_scanner/home/settings.py
@@ -404,7 +404,7 @@ DATETIME_FORMAT = '%d-%m-%Y-%m %H:%M:%S'
 # rpicam 4056x3040 2028x1080 2028x1520
 #===========================
 
-GRBL_SIMULATION = True
+GRBL_SIMULATION = config('GRBL_SIMULATION', cast=bool)
 
 EXPORTS_LOCAL_PATH = config("EXPORTS_LOCAL_PATH")
 EXPORT_REMOTE_PATH = config("EXPORT_REMOTE_PATH")