Some refactoring

main.py

@@ -1,4 +1,4 @@
-from fastapi import FastAPI, HTTPException, Query, Form, Depends
+from fastapi import FastAPI, HTTPException, Form
 from fastapi.staticfiles import StaticFiles
 from fastapi.responses import HTMLResponse, RedirectResponse, JSONResponse
 import logging
@@ -11,7 +11,7 @@ from starlette.exceptions import HTTPException as StarletteHTTPException
 from starlette.status import HTTP_302_FOUND
 import json
 from pathlib import Path
-from typing import Optional, Dict, Any
+from typing import Dict, Any
 from fastapi import Query
 import asyncio
 import datetime
@@ -19,9 +19,7 @@ import csv
 from collections import deque
 import numpy as np
 import aiohttp
-import httpx
-import time
-from patient_skid_functions import handle_patient_skid_for_idle, set_patient_skid_users
+from hardware.patient_skid import handle_patient_skid_for_idle, set_patient_skid_users
 
 from serial_manager import SerialConfig, SerialStore, SerialReader
 from protocol_decoder import decode_frames
@@ -31,7 +29,7 @@ if platform.system() in ["Darwin"]:  # macOS or Windows
     from MockCAN import CANBackend
     logging.basicConfig(level=logging.INFO)
 else:
-    from classCAN import CANBackend  # Your real backend
+    from hardware.classCAN import CANBackend  # Your real backend
     logging.basicConfig(level=logging.INFO)
 
 logging.getLogger("uvicorn.access").setLevel(logging.WARNING)
@@ -289,7 +287,6 @@ def expand_pu_number(pu_number: int) -> list[int]:
     return [pu_number] if pu_number != 3 else [1, 2]
 
 
-
 def send_command_to_pu(
     pu: int, state: str, ploop_setpoint: float, qperm_setpoint: float
 ) -> dict:
@@ -493,7 +490,6 @@ async def set_patients_with_delay(count: int, delay_s: int):
     logging.info(f"[AUTO TEST] Sending {count} patients to patient skid after {delay_s}s")
     set_patient_skid_users(count)
 
-from fastapi import Query, Path
 
 @router.post("/test/auto/{pu_number}")
 async def auto_test(pu_number: int ):