diff --git a/src/controllerSoftware/app.py b/src/controllerSoftware/app.py
index 0fb368bf..fd85e8fe 100644
--- a/src/controllerSoftware/app.py
+++ b/src/controllerSoftware/app.py
@@ -14,7 +14,7 @@ import os
 
 # Set to True to run without a physical BLE device for testing purposes.
 # Set to False to connect to the actual lamp matrix.
-DEBUG_MODE = False
+DEBUG_MODE = True
 
 # --- BLE Device Configuration (Ignored in DEBUG_MODE) ---
 DEVICE_NAME = "Pupilometer LED Billboard"