diff --git a/run_test.py b/run_test.py
index cc28374..0f4f10c 100644
--- a/run_test.py
+++ b/run_test.py
@@ -3,8 +3,14 @@ import time
 from hil_lib import SCD30_HIL_Lib
 
 # Device paths from your environment
-EMULATOR = 'COM11'#'/dev/i2c_emulator'
-TARGET = 'COM10'#'/dev/esp_sensor_test'
+Device = 'HIL'
+
+if Device == 'PC':
+    EMULATOR = 'COM11'#'/dev/i2c_emulator'
+    TARGET = 'COM10'#'/dev/esp_sensor_test'
+elif Device == 'HIL':
+    EMULATOR = '/dev/i2c_emulator'
+    TARGET = '/dev/esp_sensor_test'
 LOG_FILE = 'hil_validation_results.csv'
 
 # Initialize HIL