diff --git a/.env.example b/.env.example
new file mode 100644
index 0000000..ac9658b
--- /dev/null
+++ b/.env.example
@@ -0,0 +1,2 @@
+NTFY_Token=
+device_name=
\ No newline at end of file
diff --git a/main.py b/main.py
index 50da62e..b4fc7de 100644
--- a/main.py
+++ b/main.py
@@ -6,9 +6,10 @@ from dotenv import load_dotenv
 load_dotenv()
 
 ntfy_token = os.environ['NTFY_Token']
+device_name = os.environ['device_name']
 shutdown_timer = 10
 
-with serial.Serial('COM10', 115200, timeout=1) as ser:
+with serial.Serial(device_name, 115200, timeout=1) as ser:
     inverter_offline_counter = 0
     while True:
         if ser.readline().decode().strip() == "0":