feat: Add caching for last temperature reading in TemperatureMonitor

Sometimes page loads, sometimes doesn't trying to implement something to figure out why the page isn't loading. In python everything loads in certain order so if something hangs, it could prevent something else from running. (Like web page from loading :()

Scripts/monitors.py

@@ -55,6 +55,8 @@ class TemperatureMonitor(Monitor):
         self.last_report = 0
         self.alert_sent = False
         self.alert_start_time = None  # Track when alert started
+        self.last_temp = None    # Cached Last temperature reading
+        self.last_read_time = 0     # Timestamp of last reading
     
     def should_run(self):
         """Check if it's time to run this monitor."""
@@ -75,6 +77,10 @@ class TemperatureMonitor(Monitor):
         
         temp = list(temps.values())[0]  # Get first temp reading
         
+        # Cache the reading for web server (avoid blocking reads)
+        self.last_temp = temp
+        self.last_read_time = current_time
+        
         # Check for alerts
         alert_condition = False
         alert_message = ""

Scripts/web_server.py

@@ -8,6 +8,7 @@ class TempWebServer:
         self.port = port
         self.socket = None
         self.sensors = {}
+        self.last_page_render = 0  # Track last successful HTML generation
     
     def start(self):
         """Start the web server (non-blocking)."""
@@ -20,34 +21,47 @@ class TempWebServer:
             print("Web server started on port {}".format(self.port))
         except Exception as e:
             print("Failed to start web server: {}".format(e))
-    
+
     def check_requests(self, sensors, ac_monitor=None, heater_monitor=None, schedule_monitor=None):
         """Check for incoming requests (call in main loop)."""
         if not self.socket:
             return
-        
         try:
             conn, addr = self.socket.accept()
             conn.settimeout(3.0)
             request = conn.recv(1024).decode('utf-8')
-            
-            # Check if this is a POST request (form submission)
+
             if 'POST /update' in request:
                 response = self._handle_update(request, sensors, ac_monitor, heater_monitor, schedule_monitor)
+
+            elif 'GET /schedule' in request:
+                response = self._get_schedule_editor_page(sensors, ac_monitor, heater_monitor)
+                conn.send('HTTP/1.1 200 OK\r\nContent-Type: text/html; charset=utf-8\r\nConnection: close\r\n\r\n')
+                conn.sendall(response.encode('utf-8'))
+                conn.close()
+                return
+
             elif 'POST /schedule' in request:
                 response = self._handle_schedule_update(request, sensors, ac_monitor, heater_monitor, schedule_monitor)
+                # If handler returns a redirect response, send it raw and exit
+                if isinstance(response, str) and response.startswith('HTTP/1.1 303'):
+                    conn.sendall(response.encode('utf-8'))
+                    conn.close()
+                    return
+            elif 'GET /ping' in request:
+                # Quick health check endpoint (no processing)
+                conn.send('HTTP/1.1 200 OK\r\nContent-Type: text/plain\r\nConnection: close\r\n\r\n')
+                conn.sendall(b'OK')
+                conn.close()
+                return
+
             else:
-                # Regular GET request
                 response = self._get_status_page(sensors, ac_monitor, heater_monitor)
-            
-            # Make sure we have a valid response
+
             if response is None:
-                print("Error: response is None, generating default page")
                 response = self._get_status_page(sensors, ac_monitor, heater_monitor)
-            
-            conn.send('HTTP/1.1 200 OK\r\n')
-            conn.send('Content-Type: text/html; charset=utf-8\r\n')
-            conn.send('Connection: close\r\n\r\n')
+
+            conn.send('HTTP/1.1 200 OK\r\nContent-Type: text/html; charset=utf-8\r\nConnection: close\r\n\r\n')
             conn.sendall(response.encode('utf-8'))
             conn.close()
         except OSError:
@@ -56,12 +70,24 @@ class TempWebServer:
             print("Web server error: {}".format(e))
             import sys
             sys.print_exception(e)
-    
+
     def _save_config_to_file(self, config):
-        """Save configuration to config.json file."""
+        """Save configuration to config.json file (atomic write)."""
         try:
-            with open('config.json', 'w') as f:
+            import os
+            # Write to temp file first
+            with open('config.tmp', 'w') as f:
                 json.dump(config, f)
+            
+            # Remove old config if exists
+            try:
+                os.remove('config.json')
+            except:
+                pass
+            
+            # Rename temp to config (atomic on most filesystems)
+            os.rename('config.tmp', 'config.json')
+            
             print("Settings saved to config.json")
             return True
         except Exception as e:
@@ -86,6 +112,7 @@ class TempWebServer:
     
     def _handle_schedule_update(self, request, sensors, ac_monitor, heater_monitor, schedule_monitor):
         """Handle schedule form submission."""
+
         try:
             body = request.split('\r\n\r\n')[1] if '\r\n\r\n' in request else ''
             params = {}
@@ -160,7 +187,6 @@ class TempWebServer:
                 
                 # Redirect back to homepage
                 return 'HTTP/1.1 303 See Other\r\nLocation: /\r\n\r\n'
-            # ===== END: Handle mode actions =====
             
             elif mode_action == 'save_schedules':
                 # Just fall through to schedule parsing below
@@ -177,6 +203,20 @@ class TempWebServer:
                 heater_key = 'schedule_{}_heater'.format(i)
                 
                 if time_key in params and params[time_key]:
+                    # Validate time format (HH:MM)
+                    time_val = params[time_key]
+                    if ':' not in time_val or len(time_val.split(':')) != 2:
+                        print("Invalid time format: {}".format(time_val))
+                        return 'HTTP/1.1 303 See Other\r\nLocation: /schedule\r\n\r\n'
+                    
+                    try:
+                        hours, mins = time_val.split(':')
+                        if not (0 <= int(hours) <= 23 and 0 <= int(mins) <= 59):
+                            raise ValueError
+                    except:
+                        print("Invalid time value: {}".format(time_val))
+                        return 'HTTP/1.1 303 See Other\r\nLocation: /schedule\r\n\r\n'
+                    
                     schedule = {
                         'time': params[time_key],
                         'name': params.get(name_key, 'Schedule {}'.format(i+1)),
@@ -223,13 +263,16 @@ class TempWebServer:
             except:
                 pass
             # ===== END: Handle schedule configuration save =====
-                
+            
+            # Redirect back to schedule page
+            return 'HTTP/1.1 303 See Other\r\nLocation: /schedule\r\n\r\n'
+            
         except Exception as e:
             print("Error updating schedule: {}".format(e))
             import sys
             sys.print_exception(e)
-        
-        return self._get_status_page(sensors, ac_monitor, heater_monitor, show_success=True)
+            # Safety: avoid rendering an error page here; just redirect
+            return 'HTTP/1.1 303 See Other\r\nLocation: /schedule\r\n\r\n'
 
     def _handle_update(self, request, sensors, ac_monitor, heater_monitor, schedule_monitor):
         """Handle form submission and update settings."""
@@ -342,12 +385,18 @@ class TempWebServer:
         """Generate HTML status page."""
         print("DEBUG: Generating status page...")
         try:
-            # Get current temperatures
-            inside_temps = sensors['inside'].read_all_temps(unit='F')
-            outside_temps = sensors['outside'].read_all_temps(unit='F')
+            # Get current temperatures (use cached values to avoid blocking)
+            inside_temp = getattr(sensors.get('inside'), 'last_temp', None)
+            outside_temp = getattr(sensors.get('outside'), 'last_temp', None)
             
-            inside_temp = list(inside_temps.values())[0] if inside_temps else "N/A"
-            outside_temp = list(outside_temps.values())[0] if outside_temps else "N/A"
+            # Fallback to sensor read if no cached value (first load only)
+            if inside_temp is None:
+                inside_temps = sensors['inside'].read_all_temps(unit='F')
+                inside_temp = list(inside_temps.values())[0] if inside_temps else "N/A"
+            
+            if outside_temp is None:
+                outside_temps = sensors['outside'].read_all_temps(unit='F')
+                outside_temp = list(outside_temps.values())[0] if outside_temps else "N/A"
             
             # Get AC/Heater status
             ac_status = "ON" if ac_monitor and ac_monitor.ac.get_state() else "OFF"
@@ -386,6 +435,9 @@ class TempWebServer:
             
             # Build schedule cards
             schedule_cards = ""
+            
+            # Build mode buttons for dashboard
+            mode_buttons = self._build_mode_buttons(config)
             if config.get('schedules'):
                 for schedule in config.get('schedules', []):
                     # ===== START: Decode URL-encoded values =====
@@ -416,9 +468,6 @@ class TempWebServer:
                 </div>
                 """
             
-            # Build schedule form
-            schedule_form = self._build_schedule_form(config)
-            
             # Success message
             success_html = """
             <div class="success-message">
@@ -732,7 +781,13 @@ class TempWebServer:
         <div style="display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 15px; margin-bottom: 20px;">
             {schedule_cards}
         </div>
-        {schedule_form}
+        {mode_buttons}
+        
+        <div style="margin-top: 20px; text-align: center;">
+            <a href="/schedule" class="btn" style="text-decoration: none; display: inline-block;">
+                ⚙️ Edit Schedules
+            </a>
+        </div>
     </div>
     
     <div class="footer">
@@ -759,8 +814,9 @@ class TempWebServer:
                 schedule_color=schedule_color,
                 schedule_icon=schedule_icon,
                 schedule_cards=schedule_cards,
-                schedule_form=schedule_form
+                mode_buttons=mode_buttons
             )
+            self.last_page_render = time.time()  # Track successful render
             return html
             
         except Exception as e:
@@ -771,13 +827,11 @@ class TempWebServer:
 
     def _get_error_page(self, error_title, error_message, sensors, ac_monitor, heater_monitor):
         """Generate error page with message."""
-        # Get current temps
-        inside_temps = sensors['inside'].read_all_temps(unit='F')
-        outside_temps = sensors['outside'].read_all_temps(unit='F')
-        
-        inside_temp = list(inside_temps.values())[0] if inside_temps else "N/A"
-        outside_temp = list(outside_temps.values())[0] if outside_temps else "N/A"
+        # Get current temps (cached, fast - no blocking sensor reads)
+        inside_temp = getattr(sensors.get('inside'), 'last_temp', None) or "N/A"
+        outside_temp = getattr(sensors.get('outside'), 'last_temp', None) or "N/A"
         
+        # Format temperature values
         inside_temp_str = "{:.1f}".format(inside_temp) if isinstance(inside_temp, float) else str(inside_temp)
         outside_temp_str = "{:.1f}".format(outside_temp) if isinstance(outside_temp, float) else str(outside_temp)
         
@@ -896,137 +950,197 @@ class TempWebServer:
         )
         
         return html
-    
-    def _build_schedule_form(self, config):
-        """Build the schedule editing form."""
+
+    def _get_schedule_editor_page(self, sensors, ac_monitor, heater_monitor):
+        """Generate schedule editor page (no auto-refresh, schedules only)."""
+        # Get current temps (use cached to avoid blocking)
+        inside_temp = getattr(sensors.get('inside'), 'last_temp', None) or "N/A"
+        outside_temp = getattr(sensors.get('outside'), 'last_temp', None) or "N/A"
+        
+        # Format temperature values
+        inside_temp_str = "{:.1f}".format(inside_temp) if isinstance(inside_temp, float) else str(inside_temp)
+        outside_temp_str = "{:.1f}".format(outside_temp) if isinstance(outside_temp, float) else str(outside_temp)
+        
+        # Load config
+        config = self._load_config()
         schedules = config.get('schedules', [])
         
         # Pad with empty schedules up to 4
         while len(schedules) < 4:
-            schedules.append({'time': '', 'name': '', 'ac_target': 77.0, 'heater_target': 80.0})
-        
-        # ===== START: Determine current mode =====
-        # Check if schedules exist
-        has_schedules = len([s for s in schedules if s.get('time')]) > 0
-        
-        # Determine mode based on config
-        if not has_schedules:
-            current_mode = "no_schedules"  # No schedules configured yet
-        elif config.get('schedule_enabled'):
-            current_mode = "automatic"  # Schedules are running
-        elif config.get('permanent_hold', False):
-            current_mode = "permanent_hold"  # User disabled schedules permanently
-        else:
-            current_mode = "temporary_hold"  # Manual override (HOLD mode)
-        # ===== END: Determine current mode =====
-        
-        # ===== START: Build mode control buttons =====
-        if current_mode == "no_schedules":
-            # No mode buttons if no schedules configured
-            mode_buttons = """
-            <div style="background: #f8f9fa; padding: 15px; border-radius: 8px; text-align: center; color: #7f8c8d; margin-bottom: 20px;">
-                ℹ️ Configure schedules below, then choose a mode
-            </div>
-            """
-        elif current_mode == "automatic":
-            # Automatic mode active
-            mode_buttons = """
-            <div style="background: linear-gradient(135deg, #2ecc71, #27ae60); color: white; padding: 15px; border-radius: 10px; margin-bottom: 20px; box-shadow: 0 4px 8px rgba(0,0,0,0.2);">
-                <div style="font-weight: bold; font-size: 18px; margin-bottom: 10px;">
-                    ✅ Automatic Mode Active
-                </div>
-                <div style="font-size: 14px; margin-bottom: 15px;">
-                    Temperatures automatically adjust based on schedule
-                </div>
-                <div style="display: flex; gap: 10px; justify-content: center;">
-                    <button type="submit" name="mode_action" value="temporary_hold" style="padding: 8px 16px; background: #f39c12; color: white; border: none; border-radius: 6px; cursor: pointer; font-weight: bold;">
-                        ⏸️ Temporary Hold
-                    </button>
-                    <button type="submit" name="mode_action" value="permanent_hold" style="padding: 8px 16px; background: #e74c3c; color: white; border: none; border-radius: 6px; cursor: pointer; font-weight: bold;">
-                        🛑 Permanent Hold
-                    </button>
-                </div>
-            </div>
-            """
-        elif current_mode == "temporary_hold":
-            # Temporary hold (manual override)
-            mode_buttons = """
-            <div style="background: linear-gradient(135deg, #f39c12, #e67e22); color: white; padding: 15px; border-radius: 10px; margin-bottom: 20px; box-shadow: 0 4px 8px rgba(0,0,0,0.2);">
-                <div style="font-weight: bold; font-size: 18px; margin-bottom: 10px;">
-                    ⏸️ Temporary Hold Active
-                </div>
-                <div style="font-size: 14px; margin-bottom: 15px;">
-                    Manual settings in use - Schedule paused
-                </div>
-                <div style="display: flex; gap: 10px; justify-content: center;">
-                    <button type="submit" name="mode_action" value="resume" style="padding: 8px 16px; background: #2ecc71; color: white; border: none; border-radius: 6px; cursor: pointer; font-weight: bold;">
-                        ▶️ Resume Schedule
-                    </button>
-                    <button type="submit" name="mode_action" value="permanent_hold" style="padding: 8px 16px; background: #e74c3c; color: white; border: none; border-radius: 6px; cursor: pointer; font-weight: bold;">
-                        🛑 Make Permanent
-                    </button>
-                </div>
-            </div>
-            """
-        else:  # permanent_hold
-            # Permanent hold (schedules disabled by user)
-            mode_buttons = """
-            <div style="background: linear-gradient(135deg, #e74c3c, #c0392b); color: white; padding: 15px; border-radius: 10px; margin-bottom: 20px; box-shadow: 0 4px 8px rgba(0,0,0,0.2);">
-                <div style="font-weight: bold; font-size: 18px; margin-bottom: 10px;">
-                    🛑 Permanent Hold Active
-                </div>
-                <div style="font-size: 14px; margin-bottom: 15px;">
-                    Schedules disabled - Manual control only
-                </div>
-                <div style="display: flex; gap: 10px; justify-content: center;">
-                    <button type="submit" name="mode_action" value="resume" style="padding: 8px 16px; background: #2ecc71; color: white; border: none; border-radius: 6px; cursor: pointer; font-weight: bold;">
-                        ▶️ Enable Schedules
-                    </button>
-                </div>
-            </div>
-            """
-        # ===== END: Build mode control buttons =====
-        
-        form = """
-        <form method="POST" action="/schedule" class="controls" style="margin-top: 20px;">
-            <h3 style="color: #34495e; margin-bottom: 15px;">⚙️ Schedule Configuration</h3>
-            
-            {mode_buttons}
-        """.format(mode_buttons=mode_buttons)
+            schedules.append({'time': '', 'name': '', 'ac_target': 75.0, 'heater_target': 72.0})
         
+        # Build schedule inputs
+        schedule_inputs = ""
         for i, schedule in enumerate(schedules[:4]):
-            form += """
-            <div class="schedule-row">
-                <div class="control-group" style="margin: 0;">
-                    <label class="control-label" style="font-size: 14px;">Time</label>
-                    <input type="time" name="schedule_{i}_time" value="{time}">
+            schedule_inputs += """
+            <div style="display: grid; grid-template-columns: 1fr 2fr 1fr 1fr; gap: 10px; margin-bottom: 10px; padding: 15px; background: #f8f9fa; border-radius: 8px;">
+                <div>
+                    <label style="font-size: 14px; font-weight: bold; color: #34495e; display: block; margin-bottom: 5px;">Time</label>
+                    <input type="time" name="schedule_{i}_time" value="{time}" style="width: 100%; padding: 10px; border: 2px solid #ddd; border-radius: 5px;">
                 </div>
-                <div class="control-group" style="margin: 0;">
-                    <label class="control-label" style="font-size: 14px;">Name</label>
-                    <input type="text" name="schedule_{i}_name" value="{name}" placeholder="e.g. Morning">
+                <div>
+                    <label style="font-size: 14px; font-weight: bold; color: #34495e; display: block; margin-bottom: 5px;">Name</label>
+                    <input type="text" name="schedule_{i}_name" value="{name}" placeholder="e.g. Morning" style="width: 100%; padding: 10px; border: 2px solid #ddd; border-radius: 5px;">
                 </div>
-                <div class="control-group" style="margin: 0;">
-                    <label class="control-label" style="font-size: 14px;">Heater (°F)</label>
-                    <input type="number" name="schedule_{i}_heater" value="{heater}" step="0.5" min="60" max="85">
+                <div>
+                    <label style="font-size: 14px; font-weight: bold; color: #34495e; display: block; margin-bottom: 5px;">🔥 Heater (°F)</label>
+                    <input type="number" name="schedule_{i}_heater" value="{heater}" step="0.5" min="60" max="85" style="width: 100%; padding: 10px; border: 2px solid #ddd; border-radius: 5px;">
                 </div>
-                <div class="control-group" style="margin: 0;">
-                    <label class="control-label" style="font-size: 14px;">AC (°F)</label>
-                    <input type="number" name="schedule_{i}_ac" value="{ac}" step="0.5" min="60" max="85">
+                <div>
+                    <label style="font-size: 14px; font-weight: bold; color: #34495e; display: block; margin-bottom: 5px;">❄️ AC (°F)</label>
+                    <input type="number" name="schedule_{i}_ac" value="{ac}" step="0.5" min="60" max="85" style="width: 100%; padding: 10px; border: 2px solid #ddd; border-radius: 5px;">
                 </div>
             </div>
             """.format(
                 i=i,
                 time=schedule.get('time', ''),
                 name=schedule.get('name', ''),
-                ac=schedule.get('ac_target', 77.0),
-                heater=schedule.get('heater_target', 80.0)
+                heater=schedule.get('heater_target', 72.0),
+                ac=schedule.get('ac_target', 75.0)
             )
         
-        form += """
-            <div class="control-group" style="margin-top: 20px;">
-                <button type="submit" name="mode_action" value="save_schedules" class="btn">💾 Save Schedule Changes</button>
+        html = """
+    <!DOCTYPE html>
+    <html>
+    <head>
+        <title>Schedule Editor - Climate Control</title>
+        <meta name="viewport" content="width=device-width, initial-scale=1">
+        <meta charset="utf-8">
+        <style>
+            body {{
+                font-family: Arial, sans-serif;
+                max-width: 1000px;
+                margin: 0 auto;
+                padding: 20px;
+                background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
+                min-height: 100vh;
+            }}
+            .container {{
+                background: white;
+                border-radius: 15px;
+                padding: 30px;
+                box-shadow: 0 10px 30px rgba(0,0,0,0.3);
+            }}
+            h1 {{
+                color: #2c3e50;
+                text-align: center;
+                margin-bottom: 20px;
+            }}
+            .header-info {{
+                display: flex;
+                justify-content: center;
+                gap: 30px;
+                margin-bottom: 30px;
+                padding: 15px;
+                background: #f8f9fa;
+                border-radius: 10px;
+            }}
+            .btn {{
+                padding: 12px 24px;
+                background: linear-gradient(135deg, #667eea, #764ba2);
+                color: white;
+                border: none;
+                border-radius: 8px;
+                font-weight: bold;
+                cursor: pointer;
+                font-size: 16px;
+                text-decoration: none;
+                display: inline-block;
+            }}
+            .btn:hover {{ transform: translateY(-2px); }}
+        </style>
+    </head>
+    <body>
+        <div class="container">
+            <h1>📅 Schedule Configuration</h1>
+            
+            <div class="header-info">
+                <div>🏠 Inside: <strong>{inside_temp}°F</strong></div>
+                <div>🌡️ Outside: <strong>{outside_temp}°F</strong></div>
             </div>
-        </form>
-        """
+            
+            <form method="POST" action="/schedule">
+                <h3 style="color: #34495e; margin-bottom: 15px;">⏰ Configure Schedule Times & Temperatures</h3>
+                <p style="color: #7f8c8d; margin-bottom: 20px;">
+                    Set up to 4 time-based schedules. Leave time blank to disable a schedule.
+                </p>
+                
+                {schedule_inputs}
+                
+                <div style="margin-top: 20px;">
+                    <button type="submit" name="mode_action" value="save_schedules" class="btn" style="width: 100%;">
+                        💾 Save Schedule Configuration
+                    </button>
+                </div>
+            </form>
+            
+            <div style="text-align: center; margin-top: 20px;">
+                <a href="/" class="btn" style="background: linear-gradient(135deg, #95a5a6, #7f8c8d);">
+                    ⬅️ Back to Dashboard
+                </a>
+            </div>
+            
+            <div style="text-align: center; color: #7f8c8d; margin-top: 20px; padding-top: 20px; border-top: 2px solid #ecf0f1;">
+                💡 This page does not auto-refresh<br>
+                To change modes (Automatic/Hold), return to the dashboard
+            </div>
+        </div>
+    </body>
+    </html>
+        """.format(
+            inside_temp=inside_temp_str,
+            outside_temp=outside_temp_str,
+            schedule_inputs=schedule_inputs
+        )
         
-        return form
+        return html
+    
+    def _build_mode_buttons(self, config):
+        """Build mode control buttons for dashboard only."""
+        schedules = config.get('schedules', [])
+        has_schedules = len([s for s in schedules if s.get('time')]) > 0
+        
+        if not has_schedules:
+            return """
+            <div style="background: #f8f9fa; padding: 15px; border-radius: 8px; text-align: center; color: #7f8c8d; margin: 20px 0;">
+                ℹ️ No schedules configured - <a href="/schedule" style="color: #667eea; font-weight: bold;">Configure schedules</a>
+            </div>
+            """
+        
+        # Build mode buttons based on current state
+        if config.get('schedule_enabled'):
+            return """
+            <form method="POST" action="/schedule" style="margin: 20px 0;">
+                <div style="background: linear-gradient(135deg, #2ecc71, #27ae60); color: white; padding: 15px; border-radius: 10px; box-shadow: 0 4px 8px rgba(0,0,0,0.2);">
+                    <div style="font-weight: bold; font-size: 18px; margin-bottom: 10px;">✅ Automatic Mode</div>
+                    <div style="font-size: 14px; margin-bottom: 15px;">Temperatures adjust based on schedule</div>
+                    <div style="display: flex; gap: 10px; justify-content: center;">
+                        <button type="submit" name="mode_action" value="temporary_hold" style="padding: 10px 20px; background: #f39c12; color: white; border: none; border-radius: 6px; cursor: pointer; font-weight: bold;">⏸️ Pause</button>
+                        <button type="submit" name="mode_action" value="permanent_hold" style="padding: 10px 20px; background: #e74c3c; color: white; border: none; border-radius: 6px; cursor: pointer; font-weight: bold;">🛑 Disable</button>
+                    </div>
+                </div>
+            </form>
+            """
+        elif config.get('permanent_hold', False):
+            return """
+            <form method="POST" action="/schedule" style="margin: 20px 0;">
+                <div style="background: linear-gradient(135deg, #e74c3c, #c0392b); color: white; padding: 15px; border-radius: 10px; box-shadow: 0 4px 8px rgba(0,0,0,0.2);">
+                    <div style="font-weight: bold; font-size: 18px; margin-bottom: 10px;">🛑 Permanent Hold</div>
+                    <div style="font-size: 14px; margin-bottom: 15px;">Manual control only - Schedules disabled</div>
+                    <button type="submit" name="mode_action" value="resume" style="padding: 10px 20px; background: #2ecc71; color: white; border: none; border-radius: 6px; cursor: pointer; font-weight: bold;">▶️ Enable Schedules</button>
+                </div>
+            </form>
+            """
+        else:
+            return """
+            <form method="POST" action="/schedule" style="margin: 20px 0;">
+                <div style="background: linear-gradient(135deg, #f39c12, #e67e22); color: white; padding: 15px; border-radius: 10px; box-shadow: 0 4px 8px rgba(0,0,0,0.2);">
+                    <div style="font-weight: bold; font-size: 18px; margin-bottom: 10px;">⏸️ Temporary Hold</div>
+                    <div style="font-size: 14px; margin-bottom: 15px;">Manual override active</div>
+                    <div style="display: flex; gap: 10px; justify-content: center;">
+                        <button type="submit" name="mode_action" value="resume" style="padding: 10px 20px; background: #2ecc71; color: white; border: none; border-radius: 6px; cursor: pointer; font-weight: bold;">▶️ Resume</button>
+                        <button type="submit" name="mode_action" value="permanent_hold" style="padding: 10px 20px; background: #e74c3c; color: white; border: none; border-radius: 6px; cursor: pointer; font-weight: bold;">🛑 Disable</button>
+                    </div>
+                </div>
+            </form>
+            """

main.py

@@ -1,9 +1,13 @@
-from machine import Pin
+from machine import Pin, WDT
 import time
 import network
 import json
 import gc  # ADD THIS - for garbage collection
 
+# Enable watchdog (8 seconds timeout - auto-reboot if frozen)
+wdt = WDT(timeout=60000)
+print("Watchdog enabled (60s timeout)")
+
 # Initialize pins (LED light onboard)
 led = Pin("LED", Pin.OUT)
 led.low()
@@ -124,16 +128,20 @@ if wifi and wifi.isconnected():
     # Send startup notification to Discord
     send_discord_message(f"Pico W online at http://{ifconfig[0]} ✅")
     
-    # ===== START: NTP Time Sync =====
-    # Sync time with internet time server (required for schedules to work correctly)
-    # Without this, the Pico's clock starts at 2021 on every reboot
+    # Start web server early so page can load even if time sync is slow
+    web_server = TempWebServer(port=80)
+    web_server.start()
+
+    # Attempt time sync non-blocking (short timeout + retry flag)
+    ntp_synced = False
     try:
         import ntptime
-        ntptime.settime()  # Downloads current time from pool.ntp.org
+        ntptime.settime()
+        ntp_synced = True
         print("Time synced with NTP server")
     except Exception as e:
-        print("Failed to sync time: {}".format(e))
-    # ===== END: NTP Time Sync =====
+        print("Initial NTP sync failed: {}".format(e))
+        # Will retry later in loop
     
 else:
     # WiFi connection failed
@@ -142,12 +150,6 @@ else:
     print("="*50 + "\n")
 # ===== END: WiFi Connection =====
 
-# ===== START: Web Server Setup =====
-# Start web server for monitoring and control (accessible at http://192.168.86.43)
-web_server = TempWebServer(port=80)
-web_server.start()
-# ===== END: Web Server Setup =====
-
 # ===== START: Sensor Configuration =====
 # Define all temperature sensors and their alert thresholds
 SENSOR_CONFIG = {
@@ -285,21 +287,36 @@ monitors = [
 print("Starting monitoring loop...")
 print("Press Ctrl+C to stop\n")
 
+# Add NTP retry flags (before main loop)
+retry_ntp_attempts = 0
+max_ntp_attempts = 5  # Try up to 5 times after initial failure
+
+
 # ===== START: Main Loop =====
 # Main monitoring loop (runs forever until Ctrl+C)
 while True:
     # Run all monitors (each checks if it's time to run via should_run())
     run_monitors(monitors)
-    
-    # Check for incoming web requests (non-blocking)
-    # Pass schedule_monitor so web interface can reload config when schedules change
+
+    # Web requests
     web_server.check_requests(sensors, ac_monitor, heater_monitor, schedule_monitor)
-    
-    # ===== START: Garbage Collection =====
-    # Free up unused memory to prevent fragmentation
+
+    # Retry NTP sync every ~10s if not yet synced
+    if not ntp_synced and retry_ntp_attempts < max_ntp_attempts:
+        # Try once immediately, then whenever (time.time() % 10) < 1 (rough 10s window)
+        try:
+            import ntptime
+            if retry_ntp_attempts == 0 or (time.time() % 10) < 1:
+                ntptime.settime()
+                ntp_synced = True
+                print("NTP sync succeeded on retry #{}".format(retry_ntp_attempts + 1))
+        except Exception as e:
+            # Increment only when an actual attempt was made
+            if retry_ntp_attempts == 0 or (time.time() % 10) < 1:
+                retry_ntp_attempts += 1
+                print("NTP retry {} failed: {}".format(retry_ntp_attempts, e))
+
     gc.collect()
-    # ===== END: Garbage Collection =====
-    
-    # Small delay to prevent CPU overload (0.1 seconds = 10 loops per second)
+    wdt.feed()  # Reset watchdog timer (prevent auto-reboot)
     time.sleep(0.1)
 # ===== END: Main Loop =====