Adds read state from PU on the UI

MockCAN.py

@@ -18,7 +18,7 @@ class CANBackend:
 
     def read_current_state(self,pu_number: int):
         # Placeholder for reading mode command
-        return PUs_states[pu_number-1]
+        return PUs_states[pu_number-1]["PU_MODE"]
 
     def send_thermal_loop_cleaning(self, mode: str):
         # Placeholder for thermal loop cleaning

main.py

@@ -1,6 +1,6 @@
 from fastapi import FastAPI, HTTPException, Query, Form, Depends
 from fastapi.staticfiles import StaticFiles
-from fastapi.responses import HTMLResponse, RedirectResponse
+from fastapi.responses import HTMLResponse, RedirectResponse, JSONResponse
 import logging
 import os
 from fastapi import Request, APIRouter
@@ -120,6 +120,19 @@ def send_command(state: str, pu_number: int, ploop_setpoint: float = Query(...))
         raise HTTPException(status_code=500, detail=str(e))
 
 
+@app.get("/api/pu_status")
+def get_pu_status():
+    states = [can_backend.read_current_state(1),can_backend.read_current_state(2),can_backend.read_current_state(3)]
+    logging.info(f"Reading state '{states}' from PUs")
+
+    # Replace this with real machine status
+    return JSONResponse(content={
+        "PU1": states[0],
+        "PU2": states[1],
+        "PU3": states[2]
+    })
+
+
 @app.get("/monitor")
 def get_monitor_data():
     data = can_backend.get_latest_data()

templates/control.html

@@ -278,15 +278,33 @@
                 button.classList.remove('active');
         });
 
+        async function fetchPUStatus() {
+            try {
+                const response = await fetch("/api/pu_status"); // Replace with your actual endpoint
+                const data = await response.json();
+
+                // Assume response is like:
+                // { "PU1": "Online", "PU2": "Offline", "PU3": "Online" }
+
+                document.getElementById("pu1-status").textContent = data.PU1 || "Unknown";
+                document.getElementById("pu2-status").textContent = data.PU2 || "Unknown";
+                document.getElementById("pu3-status").textContent = data.PU3 || "Unknown";
+            } catch (error) {
+                console.error("Failed to fetch PU status:", error);
+            }
+        }
+
+        // Call it on load and then every 5 seconds
+        fetchPUStatus();
+        setInterval(fetchPUStatus, 5000);
+
+
     // Set the clicked button to active
     buttonEl.classList.add('active');
 
-    // Update PU status
-    document.getElementById(`pu${puNumber}-status`).textContent = state;
 }
 
 
-
     async function updateMonitorData() {
       const response = await fetch('/monitor');
       const data = await response.json();  // data = { PU_1: {...}, PU_2: {...}, PU_3: {...} }
@@ -318,7 +336,6 @@
       }
     }
 
-
         function updateMonitorValues(id, values, unit) {
             const container = document.getElementById(id);
             const valueElements = container.querySelectorAll('.monitor-value');