websocket doesn't work

app.py

@@ -1,11 +1,10 @@
+import app_obd, app_car, app_account, time, app_events, threading
 from flask import Flask, render_template, make_response, json
-import app_obd, app_car, app_account, time, app_events
 from app_events import socketio
 
-app = Flask(__name__)
-socketio.init_app(app)
-app_obd.obd_connection()
+port_number = 8000
 
+app = Flask(__name__)
 @app.route('/')
 def index():
     print("hello")
@@ -16,20 +15,23 @@ def dtc():
     return render_template('dtc.html')
 
 # not sure if im gonna use this
-@app.route('/api/obd_speed/')
+@app.route('/api/obd_speed')
 def data():
     data = app_obd.speed
     response = make_response(json.dumps(data))
     response.content_type = 'application/json'
     return response
 
-if __name__ == "__main__":
-    parser = argparse.ArgumentParser(
-        description="Run the Flask application with a custom port."
-    )
-    parser.add_argument(
-        "--port", type=int, default=5000, help="Port number (default is 5000)"
-    )
-    args = parser.parse_args()
+if __name__ == '__main__':  
+    socketio.init_app(app)
 
-    app.run(debug=True, port=args.port)
+    p_obd_connection = threading.Thread(target=app_obd.obd_connection)
+    p_obd_connection.start()
+
+    print("allo?")
+    
+    ##
+    ## only debug, remove in prod
+    ##
+    app.run(host='localhost', port=port_number)
+    ##