fix: Remove test_send.py script to clean up unused code

This isn't quite the fix though just want to save my position till tomorrow and see what changes come up before and after

.gitignore

@@ -1,5 +1,6 @@
 /__pycache__/
 secrets.py
+config.json
 /pymakr-test/
 .gitignore
 .vscode/

README.md

@@ -1,22 +1,73 @@
 # 🌱 Auto Garden
 
-> Automated garden monitoring and control system using Raspberry Pi Pico W
+> Automated climate control system using Raspberry Pi Pico W with web interface and scheduling
 
-## Overview
+## Recent Updates
 
-This project automates garden monitoring using a Raspberry Pi Pico W with temperature sensors, Discord notifications, and planned expansion for humidity, soil moisture, and environmental controls.
+- 🆕 **Immediate schedule application:** When resuming scheduling from hold mode, the system now instantly applies the current schedule targets (no delay).
+- 🆕 **Aggressive memory management:** Garbage collection runs every 5 seconds for improved reliability.
+- 🆕 **Manual hold settings:** `ac_target` and `heater_target` in `config.json` now only store your last manual hold settings, not schedule targets.
+- 🆕 **NTP sync optimization:** NTP modules are loaded only when needed, saving RAM.
+- 🆕 **Temperature validation:** Impossible sensor readings are ignored for safety.
+- 🆕 **Improved config persistence:** All changes are saved and reloaded immediately.
 
 ## Features
 
-- ✅ WiFi connectivity with auto-reconnect
+- **Core Features**
+  - ✅ WiFi connectivity with auto-reconnect and static IP
   - ✅ Inside/Outside temperature monitoring (DS18B20 sensors)
-- ✅ Discord notifications for temperature readings
+  - ✅ Web interface for monitoring and configuration <http://192.168.x.x>
-- ✅ Separate alert channel for critical temperatures
+  - ✅ Discord notifications for all system events
   - ✅ Temperature logging to CSV file
   - ✅ Configurable alert thresholds
-- 🚧 Humidity monitoring (planned)
+  - ✅ Exception recovery (system won't crash permanently)
-- 🚧 Soil moisture monitoring (planned)
+  - ✅ Graceful shutdown with Ctrl+C
-- 🚧 Relay control for fans, AC, heaters (planned)
+  - ✅ **Aggressive garbage collection for stability**
+
+- **Climate Control**
+  - ✅ Automated AC control with temperature swing logic
+  - ✅ Automated heater control with separate swing settings
+  - ✅ Short-cycle protection for both AC and heater
+  - ✅ Dual relay control via opto-coupler for 110V AC
+  - ✅ Mutual exclusion (AC and heater never run simultaneously)
+  - ✅ **Manual hold settings are preserved and not overwritten by schedules**
+
+- **Scheduling System**
+  - ✅ 4 configurable time-based schedules per day
+  - ✅ Each schedule sets different AC/heater targets
+  - ✅ Automatic mode with schedule following
+  - ✅ Temporary hold mode (auto-resumes after configurable time)
+  - ✅ Permanent hold mode (manual control until restart)
+  - ✅ Schedule configuration persists through reboots
+  - ✅ Hold modes reset to Automatic on restart (safety feature)
+  - ✅ **Immediate schedule application after resuming from hold**
+
+- **Web Interface**
+  - ✅ Real-time temperature display
+  - ✅ AC/Heater status indicators
+  - ✅ Manual temperature override
+  - ✅ Schedule editor (4 time slots)
+  - ✅ Mode control buttons (Automatic/Temp Hold/Perm Hold)
+  - ✅ Countdown timer for temporary holds
+  - ✅ Mobile-responsive design
+  - ✅ Auto-refresh dashboard (30 seconds)
+  - ✅ **Settings and schedule changes are reflected instantly**
+
+## Configuration Notes
+
+- **AC/Heater target settings:**  
+  - `ac_target` and `heater_target` in `config.json` are updated whenever you use Temp Hold, Perm Hold, or when a schedule is applied.
+  - When schedules are active, these values are updated to match the current schedule’s targets.
+  - This ensures the config file always reflects the current operating temperatures, whether in hold mode or schedule mode.
+
+- **Immediate schedule application:**  
+  - When you click "Resume Scheduling," the system applies the current schedule targets instantly, so the dashboard updates without delay.
+
+- **Memory management:**  
+  - Garbage collection runs every 5 seconds to prevent memory fragmentation and crashes.
+
+- **Sensor validation:**  
+  - Temperatures outside the range -50°F to 150°F are ignored to prevent false readings.
 
 ## Quick Start
 
@@ -25,8 +76,9 @@ This project automates garden monitoring using a Raspberry Pi Pico W with temper
 **Required Components:**
 
 - Raspberry Pi Pico W
-- DS18B20 temperature sensors (waterproof recommended)
+- 2x DS18B20 temperature sensors (waterproof recommended)
 - 4.7kΩ resistor (pull-up for 1-Wire bus)
+- 2-channel opto-coupler relay module (3.3V logic, 110V AC rated)
 - Momentary button (optional, for easy reset)
 
 See the [Items Needed Wiki](https://gitea.rcs1.top/sickprodigy/Auto-Garden/wiki/Items-Needed-for-the-Project) for full parts list.
@@ -46,14 +98,39 @@ Yellow (Data)  →  GP10 (Inside) - Pin 14
 Add 4.7kΩ resistor between Data line and 3.3V
 ```
 
+**⚠️ Important:** The 4.7kΩ pull-up resistor is **required** for reliable 1-Wire communication.
+
+**2-Channel Opto-Coupler Relay Module:**
+
+```text
+Low Voltage Side (Pico):
+GP15 (Pin 20)  →  IN1 (AC Control Signal)
+GP14 (Pin 19)  →  IN2 (Heater Control Signal)
+3.3V (Pin 36)  →  VCC
+GND            →  GND
+
+High Voltage Side - Relay 1 (AC Unit):
+NO (Normally Open)  →  AC Control Wire 1
+COM (Common)        →  AC Control Wire 2
+
+High Voltage Side - Relay 2 (Heater):
+NO (Normally Open)  →  Heater Control Wire 1
+COM (Common)        →  Heater Control Wire 2
+```
+
+**Note:** Most opto-coupler modules work with standard logic:
+
+- `relay.on()` = relay energized (NO closes) = Device ON
+- `relay.off()` = relay de-energized (NC closes) = Device OFF
+
+If behavior is inverted, your module may be active LOW—see troubleshooting.
+
 **Optional Reset Button:**
 
 ```text
 RUN pin  →  Button  →  GND
 ```
 
-Pressing button grounds RUN and resets the Pico.
-
 ### 3. Software Setup
 
 **Install MicroPython:**
@@ -64,7 +141,7 @@ Pressing button grounds RUN and resets the Pico.
 
 **IDE Setup:**
 
-- Recommended: VS Code with [MicroPico extension](https://marketplace.visualstudio.com/items?itemName=paulober.pico-w-go) by paulober
+- Recommended: VS Code with [MicroPico extension](https://marketplace.visualstudio.com/items?itemName=paulober.pico-w-go)
 - Alternative: Thonny IDE
 
 ### 4. Configuration
@@ -80,25 +157,51 @@ secrets = {
 }
 ```
 
-**Configure sensors in `scripts/temperature_sensor.py`:**
+**Sensor Configuration in `main.py`:**
 
 ```python
+# Sensor configuration
 SENSOR_CONFIG = {
     'inside': {
         'pin': 10,
         'label': 'Inside',
-        'alert_high': 85.0,
+        'alert_high': 80.0,
-        'alert_low': 32.0
+        'alert_low': 70.0
     },
     'outside': {
         'pin': 11,
         'label': 'Outside',
-        'alert_high': 100.0,
+        'alert_high': 85.0,
-        'alert_low': 20.0
+        'alert_low': 68.0
     }
 }
 ```
 
+**Default Climate Settings (auto-saved to config.json):**
+
+```python
+# Default config (created on first boot)
+{
+    "ac_target": 77.0,           # AC target temperature (°F)
+    "ac_swing": 1.0,             # AC turns on at 78°F, off at 76°F
+    "heater_target": 72.0,       # Heater target temperature (°F)
+    "heater_swing": 2.0,         # Heater turns on at 70°F, off at 74°F
+    "temp_hold_duration": 3600,  # Temporary hold lasts 1 hour (3600 seconds)
+    "schedule_enabled": true,    # Schedules active by default
+    "schedules": [               # 4 time-based schedules
+        {
+            "time": "06:00",
+            "name": "Morning",
+            "ac_target": 75.0,
+            "heater_target": 72.0
+        },
+        # ... 3 more schedules
+    ]
+}
+```
+
+All settings can be changed via the web interface and persist through reboots.
+
 ### 5. Upload & Run
 
 Upload all files to your Pico:
@@ -107,88 +210,296 @@ Upload all files to your Pico:
 /
 ├── main.py
 ├── secrets.py
+├── config.json              # Auto-generated on first boot
 └── scripts/
+    ├── air_conditioning.py   # AC/Heater controller classes
     ├── discord_webhook.py
     ├── monitors.py
     ├── networking.py
-    └── temperature_sensor.py
+    ├── scheduler.py          # Schedule system with hold timer
+    ├── temperature_sensor.py
+    └── web_server.py         # Web interface
 ```
 
-The Pico will auto-start `main.py` on boot.
+The Pico will auto-start `main.py` on boot and be accessible at **<http://192.168.x.x>**
 
 ## Project Structure
 
 ```text
 Auto-Garden/
-├── main.py                      # Entry point, sets up monitors
+├── main.py                      # Entry point, configuration, system initialization
 ├── secrets.py                   # WiFi & Discord credentials (gitignored)
 ├── secrets.example.py           # Template for secrets.py
+├── config.json                  # Persistent configuration (auto-generated)
 └── scripts/
+    ├── air_conditioning.py      # AC & Heater controllers with short-cycle protection
     ├── discord_webhook.py       # Discord notification handling
     ├── monitors.py              # Monitor base class & implementations
     ├── networking.py            # WiFi connection management
-    └── temperature_sensor.py    # DS18B20 sensor interface & config
+    ├── scheduler.py             # Schedule system with temporary/permanent hold modes
+    ├── temperature_sensor.py    # DS18B20 sensor interface
+    └── web_server.py            # Web interface for monitoring and control
 ```
 
-## Monitoring Behavior
+## How It Works
 
-- **Every 10 seconds:** Check temperatures, send alerts if out of range
+### Temperature Monitoring
-- **Every 30 seconds:** Regular temperature reports to Discord + log to file
-- **Every 5 seconds:** WiFi connection check with auto-reconnect
 
-**Discord Channels:**
+- **Every 10 seconds:** Check temperatures
+- **Every 30 seconds:** Send temperature reports to Discord + log to CSV
+- **Instant alerts:** High/low temperature warnings to separate Discord channel
 
-- `discord_webhook_url`: Regular temperature updates, connection status
+**Discord Notifications:**
+
+- `discord_webhook_url`: Regular updates, status changes, system events
 - `discord_alert_webhook_url`: Critical temperature alerts (Inside sensor only)
 
+**Example Discord Messages:**
+
+```text
+📊 Inside: 75.2°F | AC: OFF | Heater: OFF
+📊 Outside: 68.5°F | AC: OFF | Heater: OFF
+🔥 Inside temp HIGH: 81.0°F
+Schedule 'Morning' applied - AC: 75°F, Heater: 72°F
+⏸️ HOLD Mode - Manual override: AC: 77F +/- 1F | Heater: 72F +/- 2F
+⏰ Temporary hold expired - Automatic mode resumed
+```
+
+### Climate Control Logic
+
+**AC Control:**
+
+- Target: 77°F with 1°F swing
+- AC turns **ON** when temp > 78°F (77 + 1)
+- AC turns **OFF** when temp < 76°F (77 - 1)
+- Between 76-78°F: maintains current state (dead band prevents cycling)
+
+**Heater Control:**
+
+- Target: 72°F with 2°F swing
+- Heater turns **ON** when temp < 70°F (72 - 2)
+- Heater turns **OFF** when temp > 74°F (72 + 2)
+- Between 70-74°F: maintains current state
+
+**Short-Cycle Protection:**
+
+- Minimum run time: 30 seconds (prevents rapid off)
+- Minimum off time: 5 seconds (protects compressor/heater elements)
+- AC and heater never run simultaneously (mutual exclusion)
+
+### Scheduling System
+
+**Automatic Mode (Default):**
+
+- Schedules apply at configured times (e.g., 06:00, 12:00, 18:00, 22:00)
+- AC and heater targets update automatically
+- System follows the most recent schedule until next one applies
+
+**Temporary Hold Mode:**
+
+- Activated by manual temperature changes or "⏸️ Temp Hold" button
+- Pauses schedules for configurable duration (default: 1 hour)
+- Web UI shows countdown timer: "45 min remaining"
+- Auto-resumes to Automatic mode when timer expires
+- Can be manually resumed with "▶️ Resume" button
+
+**Permanent Hold Mode:**
+
+- Activated by "🛑 Perm Hold" button
+- Completely disables schedules (manual control only)
+- Stays disabled until "▶️ Enable Schedules" clicked or Pico reboots
+- No countdown timer
+
+**Hold Reset on Boot:**
+
+- All hold modes reset to Automatic on Pico restart/power cycle
+- Safety feature ensures schedules always resume after power loss
+- Temperature targets, swing values, and schedules persist
+
+### Web Interface
+
+Access at **<http://192.168.x.x>**
+
+**Dashboard (auto-refreshes every 30s):**
+
+- Current inside/outside temperatures
+- AC/Heater status indicators
+- Next scheduled temperature change
+- Current mode banner with countdown (if in Temporary Hold)
+- Manual temperature override form
+- Mode control buttons
+
+**Schedule Editor:**
+
+- Configure 4 time-based schedules
+- Set time (HH:MM format), name, AC target, heater target for each
+- Form validation (prevents heater > AC, invalid times)
+- No auto-refresh (prevents losing edits)
+
+**Mode Control:**
+
+- **✅ Automatic Mode:** Schedules active, temps adjust based on time
+  - Buttons: [⏸️ Temp Hold] [🛑 Perm Hold]
+- **⏸️ Temporary Hold:** Manual override with countdown timer
+  - Buttons: [▶️ Resume] [🛑 Perm Hold]
+- **🛑 Permanent Hold:** Manual control only, schedules disabled
+  - Button: [▶️ Enable Schedules]
+
+### WiFi Monitoring
+
+- **Every 5 seconds:** Check WiFi connection
+- **LED Indicator:**
+  - Solid ON: Connected
+  - Blinking: Reconnecting
+- **Auto-reconnect:** Attempts every 60 seconds if disconnected
+- **Static IP:** Always accessible at <http://192.168.x.x>
+
 ## Temperature Logs
 
 Logs are saved to `/temp_logs.csv` on the Pico:
 
 ```csv
-2025-11-05 14:30:00,Inside,28000012,72.50
+2025-11-08 14:30:00,Inside,28000012,72.50
-2025-11-05 14:30:00,Outside,28000034,45.30
+2025-11-08 14:30:00,Outside,28000034,45.30
 ```
 
 Format: `timestamp,location,sensor_id,temperature_f`
 
-## Future Expansion
+## Customization
 
-### Planned Features
+### Via Web Interface (Recommended)
 
-- **Humidity Sensors:** DHT22 or SHT31 for air humidity monitoring
+- Navigate to <http://192.168.x.x>
-- **Soil Moisture:** Capacitive sensors for plant watering automation
+- Adjust AC/Heater targets and swing values
-- **Relay Control:** 3V-32VDC SSR relays for switching AC, fans, heaters
+- Edit schedules (times, names, targets)
-- **Smart Ventilation:** Auto-open windows when outside air is optimal
+- Settings persist through reboots
-- **Light Monitoring:** LDR or BH1750 for grow light automation
 
-### Relay Wiring (Future)
+### Via config.json
 
-```text
+```json
-Pico 3.3V output → SSR relay input → High voltage device (120V/240V)
+{
+    "ac_target": 77.0,
+    "ac_swing": 1.5,              // Change swing range
+    "heater_target": 72.0,
+    "heater_swing": 2.5,
+    "temp_hold_duration": 7200,   // 2 hours (in seconds)
+    "schedules": [ /* ... */ ]
+}
 ```
 
-Use solid-state relays (SSR) rated for your voltage/current needs.
+### Via main.py (Advanced)
+
+```python
+# Relay pins
+ac_relay_pin = 15
+heater_relay_pin = 14
+
+# Sensor pins
+SENSOR_CONFIG = {
+    'inside': {'pin': 10, ...},
+    'outside': {'pin': 11, ...}
+}
+
+# Monitor intervals
+check_interval=10      # Temperature check frequency
+report_interval=30     # Discord report frequency
+```
+
+## Safety Notes
+
+⚠️ **High Voltage Warning:**
+
+- Opto-couplers isolate Pico from AC voltage
+- Never connect GPIO directly to 110V AC
+- Ensure relay module is rated for your voltage
+- Test with multimeter before connecting AC loads
+- Consider hiring licensed electrician if uncomfortable
+
+**Compressor/Heater Protection:**
+
+- Always use minimum run/off times
+- Minimum 5s off time protects compressor bearings
+- Minimum 30s run time prevents short cycling
+- AC and heater mutual exclusion prevents simultaneous operation
+
+**System Reliability:**
+
+- Exception recovery prevents permanent crashes
+- Graceful shutdown (Ctrl+C) safely turns off AC/heater
+- Hold modes reset on reboot (schedules always resume)
+- Static IP ensures web interface always accessible
 
 ## Troubleshooting
 
+**Web interface not loading:**
+
+- Verify Pico is connected to WiFi (LED should be solid)
+- Check static IP is <http://192.168.x.x>
+- Look for "Web Interface: <http://192.168.x.x>" in serial console
+- Try accessing from same WiFi network
+
 **No temperature readings:**
 
-- Check 4.7kΩ pull-up resistor is connected
+- Check 4.7kΩ pull-up resistor between data line and 3.3V
 - Verify sensor wiring (VDD to 3.3V, not 5V)
 - Check GPIO pin numbers in `SENSOR_CONFIG`
+- Run `sensor.scan_sensors()` in REPL to detect sensors
 
 **WiFi not connecting:**
 
 - Verify SSID/password in `secrets.py`
 - Check 2.4GHz WiFi (Pico W doesn't support 5GHz)
-- Look for connection messages in serial console
+- LED should be solid when connected
+- Check serial console for connection status
 
 **Discord messages not sending:**
 
-- Verify webhook URLs are correct
+- Verify webhook URLs in `secrets.py`
 - Test webhooks with curl/Postman first
 - Check Pico has internet access (ping test)
+- Look for error messages in serial console
+
+**AC/Heater not switching:**
+
+- Verify relay pin numbers (default GP15/GP14)
+- Test relay manually in REPL: `Pin(15, Pin.OUT).on()`
+- Check if module is active LOW or active HIGH
+- Ensure opto-coupler has 3.3V power
+- Look for LED on relay module (should light when active)
+- Check minimum run/off times haven't locked out switching
+
+**AC/Heater behavior inverted:**
+
+- Your opto-coupler is active LOW
+- In `air_conditioning.py`, swap `relay.on()` and `relay.off()` calls in both ACController and HeaterController classes
+
+**Schedules not applying:**
+
+- Check NTP time sync: "Time synced with NTP server" in serial
+- Verify schedule times in HH:MM format (24-hour)
+- Ensure "✅ Automatic Mode" is active (not in hold)
+- Check serial console for "Schedule Applied: [name]" messages
+
+**Temporary hold not auto-resuming:**
+
+- Check `temp_hold_duration` in config.json (in seconds)
+- Look for "⏰ Temporary hold expired" in serial console
+- ScheduleMonitor runs every 60 seconds, may take up to 1 min extra
+- Verify timer countdown appears in web UI banner
+
+**System keeps crashing:**
+
+- Check for recent code changes
+- Look for exception messages in serial console
+- System should auto-recover from most errors (5s pause, then retry)
+- If persistent, check memory usage with `gc.mem_free()`
+
+**Config changes not saving:**
+
+- Verify web form submissions redirect to dashboard/schedule page
+- Check for "Settings persisted to disk" in serial console
+- Ensure config.json has write permissions
+- Try manual edit of config.json and reboot
 
 ## Contributing
 
@@ -204,7 +515,8 @@ MIT License - See LICENSE file for details
 - [MicroPython Documentation](https://docs.micropython.org/)
 - [DS18B20 Datasheet](https://www.analog.com/media/en/technical-documentation/data-sheets/DS18B20.pdf)
 - [Discord Webhooks Guide](https://discord.com/developers/docs/resources/webhook)
+- [1-Wire Protocol Guide](https://www.analog.com/en/technical-articles/guide-to-1wire-communication.html)
 
 ---
 
-**Note:** Always ensure proper electrical safety when working with high-voltage relays and AC power. Consult a licensed electrician if unsure.
+**Note:** Always ensure proper electrical safety when working with high-voltage relays and AC power. Test thoroughly before leaving unattended.

Scripts/air_conditioning.py

@@ -1,5 +1,5 @@
-from machine import Pin
+from machine import Pin # type: ignore
-import time
+import time # type: ignore
 
 class ACController:
     """Control AC unit via opto-coupler relay."""

Scripts/discord_webhook.py

@@ -1,8 +1,25 @@
-import urequests as requests
+# Minimal module-level state (only what we need)
-from secrets import secrets
+_CONFIG = {"discord_webhook_url": None, "discord_alert_webhook_url": None}
+# Cooldown after low-memory failures (epoch seconds)
+_NEXT_ALLOWED_SEND_TS = 0
+
+def set_config(cfg: dict):
+    """Initialize module with minimal values from loaded config (call from main)."""
+    global _CONFIG
+    if not cfg:
+        _CONFIG = {"discord_webhook_url": None, "discord_alert_webhook_url": None}
+        return
+    _CONFIG = {
+        "discord_webhook_url": cfg.get("discord_webhook_url"),
+        "discord_alert_webhook_url": cfg.get("discord_alert_webhook_url"),
+    }
+
+def _get_webhook_url(is_alert: bool = False):
+    if is_alert:
+        return _CONFIG.get("discord_alert_webhook_url") or _CONFIG.get("discord_webhook_url")
+    return _CONFIG.get("discord_webhook_url")
 
 def _escape_json_str(s: str) -> str:
-    # minimal JSON string escaper for quotes/backslashes and control chars
     s = s.replace("\\", "\\\\")
     s = s.replace('"', '\\"')
     s = s.replace("\n", "\\n")
@@ -10,46 +27,110 @@ def _escape_json_str(s: str) -> str:
     s = s.replace("\t", "\\t")
     return s
 
-def send_discord_message(message, username="Auto Garden Bot", is_alert=False):
+def send_discord_message(message, username="Auto Garden Bot", is_alert=False, debug: bool = False):
+    """
+    Send Discord message with aggressive GC and low-memory guard to avoid ENOMEM.
+    When debug=True prints mem_free at important steps so you can see peak usage.
+    Returns True on success, False otherwise.
+    """
+    global _NEXT_ALLOWED_SEND_TS
     resp = None
-    
+    url = _get_webhook_url(is_alert=is_alert)
-    # Use alert webhook if specified, otherwise normal webhook
-    if is_alert:
-        url = secrets.get('discord_alert_webhook_url') or secrets.get('discord_webhook_url')
-    else:
-        url = secrets.get('discord_webhook_url')
-    
-    try:
     if not url:
-            # print("DEBUG: no webhook URL in secrets")
+        if debug: print("DBG: no webhook URL configured")
         return False
 
-        url = url.strip().strip('\'"')
+    # Respect cooldown if we recently saw ENOMEM
+    try:
+        import time  # type: ignore
+        now = time.time()
+        if _NEXT_ALLOWED_SEND_TS and now < _NEXT_ALLOWED_SEND_TS:
+            if debug: print("DBG: backing off until", _NEXT_ALLOWED_SEND_TS)
+            return False
+    except:
+        pass
 
-        # build JSON by hand so emoji (and other unicode) are preserved as UTF-8 bytes
+    try:
-        content = _escape_json_str(message)
+        # Lightweight local imports and GC
-        user = _escape_json_str(username)
+        import gc  # type: ignore
+        import time  # type: ignore
+
+        gc.collect()
+
+        # Quick mem check before importing urequests/SSL
+        mem = getattr(gc, "mem_free", lambda: None)()
+        # Require larger headroom based on device testing (adjust if you re-test)
+        if mem is not None and mem < 95000:
+            print("Discord send skipped: ENOMEM ({} bytes free)".format(mem))
+            return False
+
+        # Import urequests only when we plan to send
+        try:
+            import urequests as requests  # type: ignore
+        except Exception as e:
+            print("Discord send failed: urequests import error:", e)
+            try:
+                _NEXT_ALLOWED_SEND_TS = time.time() + 60
+            except:
+                pass
+            return False
+
+        gc.collect()
+        if debug:
+            try: print("DBG: mem after import:", gc.mem_free() // 1024, "KB")
+            except: pass
+
+        # Build tiny payload
+        url = str(url).strip().strip('\'"')
+        content = _escape_json_str(str(message)[:140])
+        user = _escape_json_str(str(username)[:32])
         body_bytes = ('{"content":"%s","username":"%s"}' % (content, user)).encode("utf-8")
-
+        headers = {"Content-Type": "application/json"}
-        headers = {"Content-Type": "application/json; charset=utf-8"}
 
         resp = requests.post(url, data=body_bytes, headers=headers)
 
         status = getattr(resp, "status", getattr(resp, "status_code", None))
-
+        return bool(status and 200 <= status < 300)
-        if status and 200 <= status < 300:
-            # print("Discord message sent")
-            return True
-        else:
-            # print(f"Discord webhook failed with status {status}")
-            return False
 
     except Exception as e:
-        # print("Failed to send Discord message:", e)
+        print("Discord send failed:", e)
-        return False
-    finally:
-        if resp:
         try:
+            if ("ENOMEM" in str(e)) or isinstance(e, MemoryError):
+                import time  # type: ignore
+                _NEXT_ALLOWED_SEND_TS = time.time() + 60
+        except:
+            pass
+        return False
+
+    finally:
+        try:
+            if resp:
                 resp.close()
         except:
             pass
+        # remove local refs and unload heavy modules to free peak RAM (urequests, ussl/ssl)
+        try:
+            if 'resp' in locals(): del resp
+            if 'body_bytes' in locals(): del body_bytes
+            if 'content' in locals(): del content
+            if 'user' in locals(): del user
+            if 'headers' in locals(): del headers
+            if 'requests' in locals(): del requests
+        except:
+            pass
+        try:
+            import sys
+            # remove urequests and SSL modules from module cache so their memory can be reclaimed
+            for m in ('urequests', 'ussl', 'ssl'):
+                if m in sys.modules:
+                    try:
+                        del sys.modules[m]
+                    except:
+                        pass
+        except:
+            pass
+        try:
+            import gc # type: ignore
+            gc.collect()
+        except:
+            pass

Scripts/heating.py

@@ -0,0 +1,68 @@
+from machine import Pin # type: ignore
+import time # type: ignore
+
+class HeaterController:
+    """Control heater via opto-coupler relay."""
+    def __init__(self, relay_pin=16, min_run_time=300, min_off_time=180):
+        """
+        relay_pin: GPIO pin connected to opto-coupler input
+        min_run_time: Minimum seconds heater must run before turning off (prevent short cycling)
+        min_off_time: Minimum seconds heater must be off before turning on (element protection)
+        """
+        self.relay = Pin(relay_pin, Pin.OUT)
+        self.relay.off()  # Start with heater off (relay normally open)
+        
+        self.min_run_time = min_run_time
+        self.min_off_time = min_off_time
+        
+        self.is_on = False
+        self.last_state_change = time.ticks_ms()
+    
+    def turn_on(self):
+        """Turn heater on if minimum off time has elapsed."""
+        if self.is_on:
+            return True  # Already on
+        
+        now = time.ticks_ms()
+        time_since_change = time.ticks_diff(now, self.last_state_change) / 1000
+        
+        if time_since_change < self.min_off_time:
+            remaining = int(self.min_off_time - time_since_change)
+            print(f"Heater cooldown: {remaining}s remaining before can turn on")
+            return False
+        
+        self.relay.on()
+        self.is_on = True
+        self.last_state_change = now
+        print("Heater turned ON")
+        return True
+    
+    def turn_off(self):
+        """Turn heater off if minimum run time has elapsed."""
+        if not self.is_on:
+            return True  # Already off
+        
+        now = time.ticks_ms()
+        time_since_change = time.ticks_diff(now, self.last_state_change) / 1000
+        
+        if time_since_change < self.min_run_time:
+            remaining = int(self.min_run_time - time_since_change)
+            print(f"Heater minimum runtime: {remaining}s remaining before can turn off")
+            return False
+        
+        self.relay.off()
+        self.is_on = False
+        self.last_state_change = now
+        print("Heater turned OFF")
+        return True
+    
+    def get_state(self):
+        """Return current heater state."""
+        return self.is_on
+    
+    def force_off(self):
+        """Emergency shut off (bypasses timers)."""
+        self.relay.off()
+        self.is_on = False
+        self.last_state_change = time.ticks_ms()
+        print("Heater FORCE OFF")

Scripts/memory_check.py

@@ -0,0 +1,29 @@
+import gc # type: ignore
+
+def check_memory_once():
+    """One-time memory check (for startup diagnostics)."""
+    gc.collect()
+    free = gc.mem_free()
+    allocated = gc.mem_alloc()
+    total = free + allocated
+    
+    print("\n" + "="*50)
+    print("Startup Memory Check:")
+    print("="*50)
+    print("Total:      {:.1f} KB".format(total / 1024))
+    print("Used:       {:.1f} KB ({:.1f}%)".format(
+        allocated / 1024, 
+        (allocated/total)*100
+    ))
+    print("Free:       {:.1f} KB ({:.1f}%)".format(
+        free / 1024,
+        (free/total)*100
+    ))
+    print("="*50 + "\n")
+    
+    return {
+        'total_kb': total / 1024,
+        'used_kb': allocated / 1024,
+        'free_kb': free / 1024,
+        'usage_percent': (allocated/total)*100
+    }

Scripts/monitors.py

@@ -1,5 +1,5 @@
-import time
+import time # type: ignore
-from scripts.discord_webhook import send_discord_message
+import scripts.discord_webhook as discord_webhook
 from scripts.temperature_sensor import TemperatureSensor
 
 class Monitor:
@@ -24,9 +24,24 @@ class Monitor:
         pass
 
 class TemperatureMonitor(Monitor):
-    """Monitor temperature sensors and report to Discord."""
+    """Monitor for tracking temperature readings and alerts."""
-    def __init__(self, sensor, label="Temp", check_interval=10, report_interval=30, alert_high=None, alert_low=None, log_file=None, send_alerts_to_separate_channel=False):
+    
-        super().__init__(check_interval)  # Check interval for temp reading
+    def __init__(self, sensor, label, check_interval=10, report_interval=60, 
+                 alert_high=None, alert_low=None, log_file="/temp_logs.csv",
+                 send_alerts_to_separate_channel=False):
+        """
+        Initialize temperature monitor.
+        
+        Args:
+            sensor: TemperatureSensor instance
+            label: Label for this sensor
+            check_interval: How often to check temp (seconds)
+            report_interval: How often to report/log temp (seconds)
+            alert_high: High temp threshold for alerts
+            alert_low: Low temp threshold for alerts
+            log_file: Path to CSV log file
+            send_alerts_to_separate_channel: Use separate Discord channel for alerts
+        """
         self.sensor = sensor
         self.label = label
         self.check_interval = check_interval
@@ -35,74 +50,123 @@ class TemperatureMonitor(Monitor):
         self.alert_low = alert_low
         self.log_file = log_file
         self.send_alerts_to_separate_channel = send_alerts_to_separate_channel
-        self.last_report_ms = 0
+        
-        self.last_alert_state = None  # Track if we were in alert state
+        self.last_check = 0
+        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."""
+        current_time = time.time()
+        if current_time - self.last_check >= self.check_interval:
+            self.last_check = current_time
+            return True
+        return False
     
     def run(self):
-        """Read sensors every check_interval, report/log every report_interval."""
+        """Check temperature and handle alerts/logging."""
+        current_time = time.time()
+        
+        # Read temperature
         temps = self.sensor.read_all_temps(unit='F')
         if not temps:
-            # print(f"No temperature readings available for {self.label}")
             return
         
-        now = time.ticks_ms()
+        temp = list(temps.values())[0]  # Get first temp reading
-        should_report = time.ticks_diff(now, self.last_report_ms) >= (self.report_interval * 1000)
         
-        for rom, temp in temps.items():
+        # ===== ADD THIS: Validate temperature is reasonable =====
-            sensor_id = rom.hex()[:8]
+        if temp < -50 or temp > 150:  # Sanity check (outside normal range)
+            print("⚠️ Warning: {} sensor returned invalid temp: {:.1f}°F".format(self.label, temp))
+            return  # Don't cache invalid reading
+        # ===== END: Validation =====
         
-            # Check if in alert state
+        # Cache the reading for web server (avoid blocking reads)
-            has_alert = False
+        self.last_temp = temp
-            alert_type = None
+        self.last_read_time = current_time
+        
+        # Check for alerts
+        alert_condition = False
+        alert_message = ""
         
         if self.alert_high and temp > self.alert_high:
-                has_alert = True
+            alert_condition = True
-                alert_type = "HIGH"
+            alert_message = "⚠️ {} temperature HIGH: {:.1f}°F (threshold: {:.1f}°F)".format(
+                self.label, temp, self.alert_high
+            )
         elif self.alert_low and temp < self.alert_low:
-                has_alert = True
+            alert_condition = True
-                alert_type = "LOW"
+            alert_message = "⚠️ {} temperature LOW: {:.1f}°F (threshold: {:.1f}°F)".format(
+                self.label, temp, self.alert_low
+            )
         
-            # Send alert immediately to alert channel (every check_interval, only if configured)
+        # Handle alert state changes
-            if has_alert and self.send_alerts_to_separate_channel:
+        if alert_condition and not self.alert_sent:
-                alert_msg = f"🚨 {self.label} Temperature: {temp:.1f}°F ⚠️ {alert_type} (threshold: {self.alert_high if alert_type == 'HIGH' else self.alert_low}°F)"
+            # Alert triggered
-                send_discord_message(alert_msg, is_alert=True)
+            self.alert_start_time = current_time
-                self.last_alert_state = True
+            print(alert_message)
             
-            # Send normal report at report_interval to regular channel (regardless of alert state)
+            # send alert (use module-level discord_webhook; set_config must be called in main)
-            if should_report:
+            if self.send_alerts_to_separate_channel:
-                temp_msg = f"🌡️ {self.label} Temperature: {temp:.1f}°F"
+                discord_webhook.send_discord_message(alert_message, is_alert=True)
+            else:
+                discord_webhook.send_discord_message(alert_message)
             
-                # Add alert indicator to regular report if in alert
+            self.alert_sent = True
-                if has_alert:
-                    temp_msg += f" ⚠️ {alert_type}"
             
-                send_discord_message(temp_msg, is_alert=False)
+        elif not alert_condition and self.alert_sent:
+            # Alert resolved
+            duration = current_time - self.alert_start_time if self.alert_start_time else 0
             
-                # Send recovery message if we were in alert and now normal
+            # Format duration
-                if not has_alert and self.last_alert_state:
+            if duration >= 3600:
-                    recovery_msg = f"✅ {self.label} Temperature back to normal: {temp:.1f}°F"
+                hours = int(duration / 3600)
-                    send_discord_message(recovery_msg, is_alert=False)
+                minutes = int((duration % 3600) / 60)
-                    self.last_alert_state = False
+                duration_str = "{}h {}m".format(hours, minutes)
+            elif duration >= 60:
+                minutes = int(duration / 60)
+                seconds = int(duration % 60)
+                duration_str = "{}m {}s".format(minutes, seconds)
+            else:
+                duration_str = "{}s".format(int(duration))
             
-            # Log to file at report_interval
+            recovery_message = "✅ {} temperature back to normal: {:.1f}°F (was out of range for {})".format(
-            if should_report and self.log_file:
+                self.label, temp, duration_str
-                self._log_temp(sensor_id, temp)
+            )
+            print(recovery_message)
             
-        # Update last report time
+            # send recovery message
-        if should_report:
+            if self.send_alerts_to_separate_channel:
-            self.last_report_ms = now
+                discord_webhook.send_discord_message(recovery_message, is_alert=True)
+            else:
+                discord_webhook.send_discord_message(recovery_message)
             
-    def _log_temp(self, sensor_id, temp):
+            self.alert_sent = False
-        """Log temperature reading to file."""
+            self.alert_start_time = None
+        
+        # Log temperature at report interval
+        if current_time - self.last_report >= self.report_interval:
+            self.last_report = current_time
+            self._log_temperature(temp)
+    
+    def _log_temperature(self, temp):
+        """Log temperature to CSV file."""
         try:
-            import time
+            # Get timestamp
-            timestamp = time.localtime()
+            t = time.localtime()
-            log_entry = f"{timestamp[0]}-{timestamp[1]:02d}-{timestamp[2]:02d} {timestamp[3]:02d}:{timestamp[4]:02d}:{timestamp[5]:02d},{self.label},{sensor_id},{temp:.2f}\n"
+            timestamp = "{:04d}-{:02d}-{:02d} {:02d}:{:02d}:{:02d}".format(
+                t[0], t[1], t[2], t[3], t[4], t[5]
+            )
             
+            # Append to log file
             with open(self.log_file, 'a') as f:
-                f.write(log_entry)
+                f.write("{},{},{:.2f}\n".format(
+                    timestamp, self.label, temp
+                ))
         except Exception as e:
-            print(f"Error logging temperature: {e}")
+            print("Error logging temperature: {}".format(e))
 
 class ACMonitor(Monitor):
     def __init__(self, ac_controller, temp_sensor, target_temp=75.0, temp_swing=2.0, interval=30):
@@ -130,31 +194,78 @@ class ACMonitor(Monitor):
             # Too hot, turn AC on
             if self.ac.turn_on():
                 if not self.last_notified_state:
-                    send_discord_message(f"❄️ AC turned ON - Current: {current_temp:.1f}°F, Target: {self.target_temp:.1f}°F")
+                    discord_webhook.send_discord_message(f"❄️ AC turned ON - Current: {current_temp:.1f}°F, Target: {self.target_temp:.1f}°F")
                     self.last_notified_state = True
         
         elif current_temp < (self.target_temp - self.temp_swing):
             # Cool enough, turn AC off
             if self.ac.turn_off():
                 if self.last_notified_state:
-                    send_discord_message(f"✅ AC turned OFF - Current: {current_temp:.1f}°F, Target: {self.target_temp:.1f}°F")
+                    discord_webhook.send_discord_message(f"✅ AC turned OFF - Current: {current_temp:.1f}°F, Target: {self.target_temp:.1f}°F")
+                    self.last_notified_state = False
+        
+        # Else: within temp_swing range, maintain current state
+
+class HeaterMonitor(Monitor):
+    """Monitor temperature and control heater automatically."""
+    def __init__(self, heater_controller, temp_sensor, target_temp=70.0, temp_swing=2.0, interval=30):
+        """
+        heater_controller: HeaterController instance
+        temp_sensor: TemperatureSensor instance (inside temp)
+        target_temp: Target temperature in °F
+        temp_swing: Temperature swing allowed (prevents rapid cycling)
+        interval: Seconds between checks
+        """
+        super().__init__(interval)
+        self.heater = heater_controller
+        self.sensor = temp_sensor
+        self.target_temp = target_temp
+        self.temp_swing = temp_swing
+        self.last_notified_state = None
+    
+    def run(self):
+        """Check temperature and control heater."""
+        temps = self.sensor.read_all_temps(unit='F')
+        if not temps:
+            return
+        
+        # Use first sensor reading (assuming single inside sensor)
+        current_temp = list(temps.values())[0]
+        
+        # Heating logic with temperature swing
+        # Turn ON if: temp < target - temp_swing
+        # Turn OFF if: temp > target + temp_swing
+        
+        if current_temp < (self.target_temp - self.temp_swing):
+            # Too cold, turn heater on
+            if self.heater.turn_on():
+                if not self.last_notified_state:
+                    discord_webhook.send_discord_message(f"🔥 Heater turned ON - Current: {current_temp:.1f}°F, Target: {self.target_temp:.1f}°F")
+                    self.last_notified_state = True
+        
+        elif current_temp > (self.target_temp + self.temp_swing):
+            # Warm enough, turn heater off
+            if self.heater.turn_off():
+                if self.last_notified_state:
+                    discord_webhook.send_discord_message(f"✅ Heater turned OFF - Current: {current_temp:.1f}°F, Target: {self.target_temp:.1f}°F")
                     self.last_notified_state = False
         
         # Else: within temp_swing range, maintain current state
 
 class WiFiMonitor(Monitor):
     """Monitor WiFi connection and handle reconnection."""
-    def __init__(self, wifi, led, interval=5, reconnect_cooldown=60):
+    def __init__(self, wifi, led, interval=5, reconnect_cooldown=60, config=None):
         super().__init__(interval)
         self.wifi = wifi
         self.led = led
         self.reconnect_cooldown = reconnect_cooldown
         self.last_reconnect_attempt = 0
         self.was_connected = wifi.isconnected() if wifi else False
+        self.config = config
     
     def run(self):
         """Check WiFi status, blink LED, attempt reconnect if needed."""
-        import network
+        import network # type: ignore
         from scripts.networking import connect_wifi
         
         is_connected = self.wifi.isconnected() if self.wifi else False
@@ -170,10 +281,10 @@ class WiFiMonitor(Monitor):
             if time.ticks_diff(now, self.last_reconnect_attempt) >= (self.reconnect_cooldown * 1000):
                 self.last_reconnect_attempt = now
                 # print("Attempting WiFi reconnect...")
-                self.wifi = connect_wifi(self.led)
+                self.wifi = connect_wifi(self.led, config=self.config)
                 
                 if self.wifi and self.wifi.isconnected():
-                    send_discord_message("WiFi connection restored 🔄")
+                    discord_webhook.send_discord_message("WiFi connection restored 🔄")
                     self.was_connected = True
         else:
             # Slow blink when connected
@@ -183,7 +294,7 @@ class WiFiMonitor(Monitor):
             
             # Notify if connection was just restored
             if not self.was_connected:
-                send_discord_message("WiFi connection restored 🔄")
+                discord_webhook.send_discord_message("WiFi connection restored 🔄")
                 self.was_connected = True
 
 def run_monitors(monitors):

Scripts/networking.py

@@ -1,37 +1,132 @@
-import network
+import network # type: ignore
-import time
+import time # type: ignore
-from secrets import secrets
 
-RECONNECT_COOLDOWN_MS = 60000  # 60 seconds
+def connect_wifi(led=None, max_retries=3, timeout=20, config=None):
-
-def connect_wifi(led=None, timeout=10):
     """
-    Connect to WiFi using secrets['ssid'] / secrets['password'].
+    Connect to WiFi using credentials from provided config dict.
-    If `led` (machine.Pin) is provided, pulse it once on successful connect.
-    Returns the WLAN object or None on failure.
-    """
-    wifi = network.WLAN(network.STA_IF)
-    wifi.active(True)
 
-    # print("Connecting to WiFi...", end="")
+    Args:
-    wifi.connect(secrets['ssid'], secrets['password'])
+        led: Optional LED pin for visual feedback
+        max_retries: Number of connection attempts (default: 3)
+        timeout: Seconds to wait for connection per attempt (default: 20)
+        config: Dict loaded from config.json, must contain config['wifi'] with 'ssid' and 'password'
+
+    Returns:
+        WLAN object if connected, None if failed
+    """
+    if config is None:
+        print("connect_wifi: config is required")
+        return None
+
+    wifi_cfg = config.get('wifi') or {}
+# support either config['wifi'] = {'ssid','password'} OR top-level 'ssid'/'password'
+    ssid = wifi_cfg.get('ssid') or config.get('ssid')
+    password = wifi_cfg.get('password') or config.get('password')
+
+    if not ssid or not password:
+        print("connect_wifi: missing wifi credentials in config['wifi']")
+        return None
+
+    wlan = network.WLAN(network.STA_IF)
+
+    # Ensure clean state
+    try:
+        if wlan.active():
+            wlan.active(False)
+            time.sleep(1)
+
+        wlan.active(True)
+        time.sleep(1)
+
+    except OSError as e:
+        print(f"WiFi activation error: {e}")
+        print("Attempting reset...")
+        try:
+            wlan.deinit()
+            time.sleep(2)
+            wlan = network.WLAN(network.STA_IF)
+            wlan.active(True)
+            time.sleep(1)
+        except Exception as e2:
+            print(f"WiFi reset failed: {e2}")
+            return None
+
+    # Try connecting with retries
+    for attempt in range(1, max_retries + 1):
+        if wlan.isconnected():
+            print("Already connected to WiFi")
+            break
+
+        print(f'Connecting to WiFi SSID: {ssid} (attempt {attempt}/{max_retries})...')
+
+        try:
+            wlan.connect(ssid, password)
+        except Exception as e:
+            print(f"Connection attempt failed: {e}")
+            if attempt < max_retries:
+                print("Retrying in 3 seconds...")
+                time.sleep(3)
+            continue
 
         # Wait for connection with timeout
-    max_wait = timeout
+        wait_time = 0
-    while max_wait > 0:
+        while wait_time < timeout:
-        if wifi.status() < 0 or wifi.status() >= 3:
+            if wlan.isconnected():
                 break
-        max_wait -= 1
-        # print(".", end="")
-        time.sleep(1)
 
-    if wifi.isconnected():
-        # print("\nConnected! Network config:", wifi.ifconfig())
             if led:
-            led.on()
+                try:
-            time.sleep(1)
+                    # some LED wrappers use toggle(), others use on/off
-            led.off()
+                    if hasattr(led, "toggle"):
-        return wifi
+                        led.toggle()
                     else:
-        # print("\nConnection failed!")
+                        # flash quickly to show activity
+                        led.on()
+                        time.sleep(0.05)
+                        led.off()
+                except Exception:
+                    pass
+
+            time.sleep(0.5)
+            wait_time += 0.5
+
+            # Print progress dots every 2 seconds
+            if int(wait_time * 2) % 4 == 0:
+                print('.', end='')
+
+        print()  # New line after dots
+
+        if wlan.isconnected():
+            break
+
+        print(f'Connection attempt {attempt} failed')
+        if attempt < max_retries:
+            print("Retrying in 3 seconds...")
+            time.sleep(3)
+
+    # Final connection check
+    if not wlan.isconnected():
+        print('WiFi connection failed after all attempts!')
+        if led:
+            try:
+                # prefer available method names
+                if hasattr(led, "off"):
+                    led.off()
+            except Exception:
+                pass
         return None
+
+    # Success feedback
+    if led:
+        try:
+            for _ in range(2):
+                led.on()
+                time.sleep(0.2)
+                led.off()
+                time.sleep(0.2)
+        except Exception:
+            pass
+
+    print('Connected to WiFi successfully!')
+
+    return wlan

Scripts/scheduler.py

@@ -0,0 +1,227 @@
+import time # type: ignore
+
+class ScheduleMonitor:
+    """Monitor that checks and applies temperature schedules."""
+
+    def __init__(self, ac_monitor, heater_monitor, config, interval=60):
+        """
+        Initialize schedule monitor.
+        
+        Args:
+            ac_monitor: ACMonitor instance
+            heater_monitor: HeaterMonitor instance
+            config: Configuration dict with schedules
+            interval: How often to check schedule (seconds)
+        """
+        self.ac_monitor = ac_monitor
+        self.heater_monitor = heater_monitor
+        self.config = config
+        self.interval = interval
+        self.last_check = 0
+        self.current_schedule = None
+        self.last_applied_schedule = None
+        self.temp_hold_duration = config.get('temp_hold_duration', 3600)  # Use config value, default 1 hour
+
+    def should_run(self):
+        """Check if it's time to run this monitor."""
+        current_time = time.time()
+        if current_time - self.last_check >= self.interval:
+            self.last_check = current_time
+            return True
+        return False
+
+    def _parse_time(self, time_str):
+        """Convert time string 'HH:MM' to minutes since midnight."""
+        try:
+            parts = time_str.split(':')
+            hours = int(parts[0])
+            minutes = int(parts[1])
+            return hours * 60 + minutes
+        except:
+            return None
+
+    def _get_current_minutes(self):
+        """Get current time in minutes since midnight."""
+        t = time.localtime()
+        return t[3] * 60 + t[4]  # hours * 60 + minutes
+
+    def _find_active_schedule(self):
+        """Find which schedule should be active right now."""
+        if not self.config.get('schedule_enabled', False):
+            # Schedule is disabled (HOLD mode)
+            return None
+        
+        schedules = self.config.get('schedules', [])
+        if not schedules:
+            return None
+        
+        current_minutes = self._get_current_minutes()
+        
+        # Sort schedules by time
+        sorted_schedules = []
+        for schedule in schedules:
+            schedule_minutes = self._parse_time(schedule['time'])
+            if schedule_minutes is not None:
+                sorted_schedules.append((schedule_minutes, schedule))
+        
+        sorted_schedules.sort()
+        
+        # Find the most recent schedule that has passed
+        active_schedule = None
+        for schedule_minutes, schedule in sorted_schedules:
+            if current_minutes >= schedule_minutes:
+                active_schedule = schedule
+            else:
+                break
+        
+        # If no schedule found (before first schedule), use last schedule from yesterday
+        if active_schedule is None and sorted_schedules:
+            active_schedule = sorted_schedules[-1][1]
+        
+        return active_schedule
+
+    def _apply_schedule(self, schedule):
+        """Apply a schedule's settings to the monitors."""
+        if not schedule:
+            return
+
+        schedule_id = schedule.get('time', '') + schedule.get('name', '')
+        if schedule_id == self.last_applied_schedule:
+            return  # Already applied
+
+        try:
+            # Track whether we changed persisted values to avoid unnecessary writes
+            changed = False
+
+            # Update AC settings if provided
+            if 'ac_target' in schedule:
+                new_ac = float(schedule['ac_target'])
+                if self.config.get('ac_target') != new_ac:
+                    self.config['ac_target'] = new_ac
+                    changed = True
+                self.ac_monitor.target_temp = new_ac
+
+            if 'ac_swing' in schedule:
+                new_ac_swing = float(schedule['ac_swing'])
+                if self.config.get('ac_swing') != new_ac_swing:
+                    self.config['ac_swing'] = new_ac_swing
+                    changed = True
+                self.ac_monitor.temp_swing = new_ac_swing
+
+            # Update heater settings if provided
+            if 'heater_target' in schedule:
+                new_ht = float(schedule['heater_target'])
+                if self.config.get('heater_target') != new_ht:
+                    self.config['heater_target'] = new_ht
+                    changed = True
+                self.heater_monitor.target_temp = new_ht
+
+            if 'heater_swing' in schedule:
+                new_ht_swing = float(schedule['heater_swing'])
+                if self.config.get('heater_swing') != new_ht_swing:
+                    self.config['heater_swing'] = new_ht_swing
+                    changed = True
+                self.heater_monitor.temp_swing = new_ht_swing
+
+            # Save updated config only if something changed
+            if changed:
+                try:
+                    import json
+                    with open('config.json', 'w') as f:
+                        json.dump(self.config, f)
+                except Exception as e:
+                    print("⚠️ Could not save config: {}".format(e))
+                else:
+                    # import once and update module-level webhook config
+                    try:
+                        import scripts.discord_webhook as discord_webhook
+                        discord_webhook.set_config(self.config)
+                    except Exception:
+                        pass
+                    print("✅ Config updated with active schedule targets")
+            else:
+                # nothing to persist
+                try:
+                    import scripts.discord_webhook as discord_webhook
+                except Exception:
+                    discord_webhook = None
+
+            # Log the change
+            schedule_name = schedule.get('name', 'Unnamed')
+            print("\n" + "="*50)
+            print("Schedule Applied: {}".format(schedule_name))
+            print("="*50)
+            print("AC Target:      {}°F".format(self.ac_monitor.target_temp))
+            print("Heater Target:  {}°F".format(self.heater_monitor.target_temp))
+            print("="*50 + "\n")
+
+            # Send Discord notification (use discord_webhook if available)
+            try:
+                if 'discord_webhook' not in locals() or discord_webhook is None:
+                    import scripts.discord_webhook as discord_webhook
+                message = "🕐 Schedule '{}' applied - AC: {}°F | Heater: {}°F".format(
+                    schedule_name,
+                    self.ac_monitor.target_temp,
+                    self.heater_monitor.target_temp
+                )
+                discord_webhook.send_discord_message(message)
+            except Exception:
+                pass
+
+            self.last_applied_schedule = schedule_id
+
+        except Exception as e:
+            print("Error applying schedule: {}".format(e))
+
+    def run(self):
+        """Check if schedule needs to be updated."""
+        
+        # ===== START: Check if temporary hold has expired =====
+        if not self.config.get('schedule_enabled', False) and not self.config.get('permanent_hold', False):
+            # In temporary hold mode - check if timer expired
+            temp_hold_start = self.config.get('temp_hold_start_time')  # <-- READ FROM CONFIG NOW
+            
+            if temp_hold_start is not None:
+                elapsed = time.time() - temp_hold_start
+                
+                if elapsed >= self.temp_hold_duration:
+                    # Timer expired - resume automatic scheduling
+                    print("⏰ Temporary hold expired - resuming schedule")
+                    self.config['schedule_enabled'] = True
+                    self.config['temp_hold_start_time'] = None
+                    
+                    # Save updated config
+                    try:
+                        import json
+                        with open('config.json', 'w') as f:
+                            json.dump(self.config, f)
+                    except Exception as e:
+                        print("⚠️ Could not save config: {}".format(e))
+                    else:
+                        # ensure in-memory webhook config updated
+                        try:
+                            import scripts.discord_webhook as discord_webhook
+                            discord_webhook.set_config(self.config)
+                        except Exception:
+                            pass
+
+                        print("✅ Config updated - automatic mode resumed")
+
+                        # Notify user
+                        try:
+                            import scripts.discord_webhook as discord_webhook
+                            discord_webhook.send_discord_message("⏰ Temporary hold expired - Schedule resumed automatically")
+                        except Exception:
+                            pass
+        # ===== END: Check if temporary hold has expired =====
+        
+        # Find and apply active schedule
+        active_schedule = self._find_active_schedule()
+        if active_schedule:
+            self._apply_schedule(active_schedule)
+
+    def reload_config(self, new_config):
+        """Reload configuration (called when settings are updated via web)."""
+        self.config = new_config
+        self.last_applied_schedule = None  # Force re-application
+        print("Schedule configuration reloaded")

Scripts/temperature_sensor.py

@@ -1,7 +1,7 @@
-import machine
+import machine # type: ignore
-import onewire
+import onewire # type: ignore
-import ds18x20
+import ds18x20 # type: ignore
-import time
+import time # type: ignore
 
 class TemperatureSensor:
     def __init__(self, pin=10, label=None):
@@ -63,26 +63,3 @@ class TemperatureSensor:
             print(f'Error reading temperatures: {e}')
         
         return results
-
-# Sensor configuration registry
-SENSOR_CONFIG = {
-    'inside': {
-        'pin': 10,
-        'label': 'Inside',
-        'alert_high': 80.0,
-        'alert_low': 70.0
-    },
-    'outside': {
-        'pin': 11,
-        'label': 'Outside',
-        'alert_high': 85.0,
-        'alert_low': 68.0
-    }
-}
-
-def get_configured_sensors():
-    """Return dictionary of configured sensor instances."""
-    sensors = {}
-    for key, config in SENSOR_CONFIG.items():
-        sensors[key] = TemperatureSensor(pin=config['pin'], label=config['label'])
-    return sensors

config.json.Example

@@ -0,0 +1,45 @@
+{
+    "static_ip": "192.168.1.69",
+    "subnet": "255.255.255.0",
+    "gateway": "192.168.1.1",
+    "dns": "192.168.1.1",
+    "timezone_offset": -5,
+    "ssid": " Change_to_wifi_SSID",
+    "password": "Change_to_wifi_Pasword",
+    "discord_webhook_url": "https://discord.com/api/webhooks/key/long-Combination_1234-ChangeMe",
+    "discord_alert_webhook_url": "https://discord.com/api/webhooks/key/long-Combination_1234-ChangeMe",
+    "ac_target": 77.0,
+    "ac_swing": 1.0,
+    "heater_target": 72.0,
+    "heater_swing": 2.0,
+    "temp_hold_duration": 3600,
+    "schedules": [
+        {
+            "time": "06:00",
+            "ac_target": 75.0,
+            "heater_target": 72.0,
+            "name": "Morning"
+        },
+        {
+            "time": "12:00",
+            "ac_target": 75.0,
+            "heater_target": 72.0,
+            "name": "Midday"
+        },
+        {
+            "time": "18:00",
+            "ac_target": 75.0,
+            "heater_target": 72.0,
+            "name": "Evening"
+        },
+        {
+            "time": "22:00",
+            "ac_target": 75.0,
+            "heater_target": 72.0,
+            "name": "Night"
+        }
+    ],
+    "schedule_enabled": true,
+    "permanent_hold": false,
+    "temp_hold_start_time": null
+}

main.py

@@ -1,65 +1,487 @@
-from machine import Pin
+from machine import Pin, RTC # type: ignore
-import time
+import time # type: ignore
-from scripts.networking import connect_wifi
+import network # type: ignore
-from scripts.discord_webhook import send_discord_message
+import json
-from scripts.monitors import TemperatureMonitor, WiFiMonitor, ACMonitor, run_monitors
+import gc  # type: ignore # ADD THIS - for garbage collection
-from scripts.temperature_sensor import get_configured_sensors, SENSOR_CONFIG
+import sys
-from scripts.air_conditioning import ACController
 
 # Initialize pins (LED light onboard)
 led = Pin("LED", Pin.OUT)
 led.low()
 
-# Connect to WiFi
+# Hard reset WiFi interface before connecting
-wifi = connect_wifi(led)
+print("Initializing WiFi...")
+try:
+    wlan = network.WLAN(network.STA_IF)
+    wlan.deinit()
+    time.sleep(2)
+    print("WiFi interface reset complete")
+except Exception as e:
+    print(f"WiFi reset warning: {e}")
 
-# Send startup message if connected
+# Import after WiFi reset
+from scripts.networking import connect_wifi
+
+# ===== NEW: NTP Sync Function (imports locally) =====
+def sync_ntp_time(timezone_offset):
+    """
+    Sync time with NTP server (imports modules locally to save RAM).
+    Returns True if successful, False otherwise.
+    """
+    try:
+        # Import ONLY when needed (freed by GC after function ends)
+        import socket  # type: ignore
+        import struct  # type: ignore
+        
+        NTP_DELTA = 2208988800
+        host = "pool.ntp.org"
+        NTP_QUERY = bytearray(48)
+        NTP_QUERY[0] = 0x1B
+        
+        # Create socket with timeout
+        s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+        s.settimeout(3.0)  # 3-second timeout
+        
+        try:
+            addr = socket.getaddrinfo(host, 123)[0][-1]
+            s.sendto(NTP_QUERY, addr)
+            msg = s.recv(48)
+            val = struct.unpack("!I", msg[40:44])[0]
+            utc_timestamp = val - NTP_DELTA
+            
+            # Apply timezone offset
+            local_timestamp = utc_timestamp + (timezone_offset * 3600)
+            
+            # Set RTC with local time
+            tm = time.gmtime(local_timestamp)
+            RTC().datetime((tm[0], tm[1], tm[2], tm[6] + 1, tm[3], tm[4], tm[5], 0))
+            
+            return True
+            
+        finally:
+            s.close()
+            
+    except Exception as e:
+        print("NTP sync failed: {}".format(e))
+        return False
+    finally:
+        # Force garbage collection to free socket/struct modules
+        gc.collect()
+# ===== END: NTP Sync Function =====
+
+# ===== START: Configuration Loading =====
+# Load saved settings from config.json file on Pico
+def load_config():
+    """Load configuration from config.json file."""
+    try:
+        with open('config.json', 'r') as f:
+            config = json.load(f)
+            print("Loaded saved settings from config.json")
+            return config
+    except:
+        # If file doesn't exist or is corrupted, create default config
+        print("No saved config found, creating default config.json...")
+        
+        default_config = {
+            'static_ip': '192.168.86.43',
+            'subnet': '255.255.255.0',
+            'gateway': '192.168.86.1',
+            'dns': '192.168.86.1',
+            'timezone_offset': -6,     # Timezone offset from UTC (CST=-6, EST=-5, MST=-7, PST=-8, add 1 for DST)
+            'ac_target': 75.0,         # Default AC target temp
+            'ac_swing': 1.0,           # Default AC tolerance (+/- degrees)
+            'heater_target': 72.0,     # Default heater target temp
+            'heater_swing': 2.0,       # Default heater tolerance (+/- degrees)
+            'temp_hold_duration': 3600, # Default hold duration in seconds (1 hour)
+            'temp_hold_start_time': None, # No hold active at startup
+            'schedules': [             # Default 4 schedules
+                {
+                    'time': '06:00',
+                    'name': 'Morning',
+                    'ac_target': 75.0,
+                    'heater_target': 72.0
+                },
+                {
+                    'time': '12:00',
+                    'name': 'Midday',
+                    'ac_target': 75.0,
+                    'heater_target': 72.0
+                },
+                {
+                    'time': '18:00',
+                    'name': 'Evening',
+                    'ac_target': 75.0,
+                    'heater_target': 72.0
+                },
+                {
+                    'time': '22:00',
+                    'name': 'Night',
+                    'ac_target': 75.0,
+                    'heater_target': 72.0
+                }
+            ],
+            'schedule_enabled': True, # Schedules disabled by default (user can enable via web)
+            'permanent_hold': False    # Permanent hold disabled by default
+        }
+        
+        # ===== START: Save default config to file =====
+        try:
+            with open('config.json', 'w') as f:
+                json.dump(default_config, f)
+            print("✅ Default config.json created successfully with 4 sample schedules")
+        except Exception as e:
+            print("⚠️ Warning: Could not create config.json: {}".format(e))
+            print("   (Program will continue with defaults in memory)")
+        # ===== END: Save default config to file =====
+        
+        return default_config
+
+# global variables for Discord webhook status
+discord_sent = False
+discord_send_attempts = 0
+pending_discord_message = None
+
+# Load configuration from file
+config = load_config()
+import scripts.discord_webhook as discord_webhook
+# Initialize discord webhook module with loaded config (must be done BEFORE any send_discord_message calls)
+discord_webhook.set_config(config)
+
+# Get timezone offset from config (with fallback to -6 if not present)
+TIMEZONE_OFFSET = config.get('timezone_offset', -6)
+
+# ===== START: Reset hold modes on startup =====
+# Always reset to automatic mode on boot (don't persist hold states)
+if 'schedule_enabled' in config:
+    config['schedule_enabled'] = True  # Always enable schedules on boot
+if 'permanent_hold' in config:
+    config['permanent_hold'] = False   # Always clear permanent hold on boot
+if 'temp_hold_start_time' in config:
+    config['temp_hold_start_time'] = None  # Clear temp hold start time
+
+# Save the reset config immediately
+try:
+    with open('config.json', 'w') as f:
+        json.dump(config, f)
+    print("✅ Hold modes reset - Automatic mode active")
+except Exception as e:
+    print("⚠️ Warning: Could not save config reset: {}".format(e))
+# ===== END: Reset hold modes on startup =====
+# ===== END: Configuration Loading =====
+
+# ===== START: WiFi Connection =====
+# Connect to WiFi using credentials from config.json
+wifi = connect_wifi(led, config=config)
+
+# Set static IP and print WiFi details
 if wifi and wifi.isconnected():
-    send_discord_message("Pico W online and connected ✅")
+    # Get static IP settings from config
+    static_ip = config.get('static_ip')
+    subnet = config.get('subnet')
+    gateway = config.get('gateway')
+    dns = config.get('dns')
     
-# Get configured sensors
+    # Apply static IP configuration
-sensors = get_configured_sensors() # returns a dict, e.g. {'inside': ..., 'outside': ...}
+    wifi.ifconfig((static_ip, subnet, gateway, dns))
+    time.sleep(1)
+    
+    # Print WiFi details for debugging
+    ifconfig = wifi.ifconfig()
+    print("\n" + "="*50)
+    print("WiFi Connected Successfully!")
+    print("="*50)
+    print(f"IP Address:     {ifconfig[0]}")
+    print(f"Subnet Mask:    {ifconfig[1]}")
+    print(f"Gateway:        {ifconfig[2]}")
+    print(f"DNS Server:     {ifconfig[3]}")
+    print(f"Web Interface:  http://{ifconfig[0]}")
+    print("="*50 + "\n")
+    
+    # Try sending Discord webhook NOW, before creating other objects
+    gc.collect()
+    ram_free = gc.mem_free()
+    print(f"DEBUG: Free RAM before Discord send: {ram_free // 1024} KB")
+    mem_ok = ram_free > 95000
+    if mem_ok:
+        ok = discord_webhook.send_discord_message("Pico W online at http://{}".format(ifconfig[0]), debug=False)
+        if ok:
+            print("Discord startup notification sent")
+            discord_sent = True
+        else:
+            print("Discord startup notification failed")
+            pending_discord_message = "Pico W online at http://{}".format(ifconfig[0])
+            discord_send_attempts = 1
+    else:
+        print("Not enough memory for Discord startup notification")
+        pending_discord_message = "Pico W online at http://{}".format(ifconfig[0])
+        discord_send_attempts = 1
+    
+    # ===== Moved to later so discord could fire off startup message hopefully =====
+    from scripts.monitors import TemperatureMonitor, WiFiMonitor, ACMonitor, HeaterMonitor, run_monitors
+    from scripts.temperature_sensor import TemperatureSensor
+    from scripts.air_conditioning import ACController
+    from scripts.heating import HeaterController
+    from scripts.web_server import TempWebServer
+    from scripts.scheduler import ScheduleMonitor
+    from scripts.memory_check import check_memory_once
+    
+    # Start web server early so page can load even if time sync is slow
+    web_server = TempWebServer(port=80)
+    web_server.start()
+
+    # ===== INITIAL NTP SYNC (using function) =====
+    ntp_synced = False
+    try:
+        ntp_synced = sync_ntp_time(TIMEZONE_OFFSET)
+        if ntp_synced:
+            print("Time synced with NTP server (UTC{:+d})".format(TIMEZONE_OFFSET))
+        else:
+            print("Initial NTP sync failed, will retry in background...")
+    except Exception as e:
+        print("Initial NTP sync error: {}".format(e))
+    # ===== END: INITIAL NTP SYNC =====
+    
+else:
+    # WiFi connection failed
+    print("\n" + "="*50)
+    print("WiFi Connection Failed!")
+    print("="*50 + "\n")
+# ===== END: WiFi Connection =====
+
+
+
+# ===== START: Sensor Configuration =====
+# Define all temperature sensors and their alert thresholds
+SENSOR_CONFIG = {
+    'inside': {
+        'pin': 10,              # GPIO pin for DS18B20 sensor
+        'label': 'Inside',      # Display name
+        'alert_high': 80.0,     # Send alert if temp > 80°F
+        'alert_low': 70.0       # Send alert if temp < 70°F
+    },
+    'outside': {
+        'pin': 11,              # GPIO pin for DS18B20 sensor
+        'label': 'Outside',     # Display name
+        'alert_high': 85.0,     # Send alert if temp > 85°F
+        'alert_low': 68.0       # Send alert if temp < 68°F
+    }
+}
+
+# Initialize sensors based on configuration
+def get_configured_sensors():
+    """Return dictionary of configured sensor instances."""
+    sensors = {}
+    for key, config in SENSOR_CONFIG.items():
+        sensors[key] = TemperatureSensor(pin=config['pin'], label=config['label'])
+    return sensors
+
+# Create sensor instances
+sensors = get_configured_sensors()
+# ===== END: Sensor Configuration =====
+
+# ===== START: AC Controller Setup =====
+# Set up air conditioning relay controller
 ac_controller = ACController(
-    relay_pin=15,
+    relay_pin=15,           # GPIO pin connected to AC relay
-    min_run_time=30,
+    min_run_time=30,        # Minimum seconds AC must run before turning off
-    min_off_time=5
+    min_off_time=5          # Minimum seconds AC must be off before turning on again
 )
 
+# Create AC monitor (automatically controls AC based on temperature)
 ac_monitor = ACMonitor(
     ac_controller=ac_controller,
-    temp_sensor=sensors['inside'],  # <-- This is your inside temperature sensor
+    temp_sensor=sensors['inside'],      # Use inside sensor for AC control
-    target_temp=77.0,
+    target_temp=config['ac_target'],    # Target temp from config.json
-    temp_swing=1.0,
+    temp_swing=config['ac_swing'],      # Tolerance (+/- degrees)
-    interval=30
+    interval=30                         # Check temperature every 30 seconds
+)
+# ===== END: AC Controller Setup =====
+
+# ===== START: Heater Controller Setup =====
+# Set up heating relay controller
+heater_controller = HeaterController(
+    relay_pin=16,           # GPIO pin connected to heater relay
+    min_run_time=30,        # Minimum seconds heater must run before turning off
+    min_off_time=5          # Minimum seconds heater must be off before turning on again
 )
 
-# Set up monitors
+# Create heater monitor (automatically controls heater based on temperature)
-monitors = [
+heater_monitor = HeaterMonitor(
-    WiFiMonitor(wifi, led, interval=5, reconnect_cooldown=60),
+    heater_controller=heater_controller,
-    ac_monitor,
+    temp_sensor=sensors['inside'],          # Use inside sensor for heater control
-]
+    target_temp=config['heater_target'],    # Target temp from config.json
-
+    temp_swing=config['heater_swing'],      # Tolerance (+/- degrees)
-# Add temperature monitors from config
+    interval=30                             # Check temperature every 30 seconds
-for key, sensor in sensors.items():
-    config = SENSOR_CONFIG[key]
-    
-    # Inside temp alerts go to separate channel
-    send_to_alert_channel = (key == 'inside')
-    
-    monitors.append(
-        TemperatureMonitor(
-            sensor=sensor,
-            label=config['label'],
-            check_interval=10,      # Check temp every 10 seconds
-            report_interval=30,     # Report/log every 30 seconds
-            alert_high=config['alert_high'],
-            alert_low=config['alert_low'],
-            log_file="/temp_logs.csv",
-            send_alerts_to_separate_channel=send_to_alert_channel
 )
+# ===== END: Heater Controller Setup =====
+
+# ===== START: Schedule Monitor Setup =====
+# Create schedule monitor (automatically changes temp targets based on time of day)
+schedule_monitor = ScheduleMonitor(
+    ac_monitor=ac_monitor,          # Pass AC monitor to control
+    heater_monitor=heater_monitor,  # Pass heater monitor to control
+    config=config,                  # Pass config with schedules
+    interval=60                     # Check schedule every 60 seconds
 )
 
-# Main monitoring loop
+# ===== APPLY ACTIVE SCHEDULE IMMEDIATELY ON STARTUP =====
+if config.get('schedule_enabled', False):
+    try:
+        # Find and apply the current active schedule
+        active_schedule = schedule_monitor._find_active_schedule()
+        if active_schedule:
+            schedule_monitor._apply_schedule(active_schedule)
+            print("✅ Active schedule applied on startup: {}".format(
+                active_schedule.get('name', 'Unnamed')
+            ))
+        else:
+            print("ℹ️ No active schedule found (using manual targets)")
+    except Exception as e:
+        print("⚠️ Warning: Could not apply startup schedule: {}".format(e))
+else:
+    print("ℹ️ Schedules disabled - using manual targets")
+# ===== END: APPLY ACTIVE SCHEDULE ON STARTUP =====
+# ===== END: Schedule Monitor Setup =====
+
+# ===== START: Print Current Settings =====
+# Display loaded configuration for debugging
+print("\n" + "="*50)
+print("Current Climate Control Settings:")
+print("="*50)
+print(f"AC Target:      {config['ac_target']}°F ± {config['ac_swing']}°F")
+print(f"Heater Target:  {config['heater_target']}°F ± {config['heater_swing']}°F")
+print(f"Schedule:       {'Enabled' if config.get('schedule_enabled') else 'Disabled'}")
+if config.get('schedules'):
+    print(f"Schedules:      {len(config.get('schedules', []))} configured")
+print("="*50 + "\n")
+# ===== END: Print Current Settings =====
+
+# ===== START: Startup Memory Check =====
+# Check memory usage after all imports and initialization
+check_memory_once()
+# ===== END: Startup Memory Check =====
+
+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
+last_ntp_sync = time.time()  # Track when we last synced
+
+try:
     while True:
-    run_monitors(monitors)
+        
+        # ===== START: Main Loop =====
+        # Main monitoring loop (runs forever until Ctrl+C)
+        last_monitor_run = {
+            "wifi": 0,
+            "schedule": 0,
+            "ac": 0,
+            "heater": 0,
+            "inside_temp": 0,
+            "outside_temp": 0,
+        }
+        
+        while True:
+            now = time.time()
+        
+            # WiFi monitor every 5 seconds (can be stateless)
+            if now - last_monitor_run["wifi"] >= 5:
+                from scripts.monitors import WiFiMonitor
+                wifi_monitor = WiFiMonitor(wifi, led, interval=5, reconnect_cooldown=60, config=config)
+                try:
+                    wifi_monitor.run()
+                except Exception as e:
+                    print("WiFiMonitor error:", e)
+                del wifi_monitor
+                gc.collect()
+                last_monitor_run["wifi"] = now
+        
+            # Schedule monitor every 60 seconds (persistent)
+            if now - last_monitor_run["schedule"] >= 60:
+                try:
+                    schedule_monitor.run()
+                except Exception as e:
+                    print("ScheduleMonitor error:", e)
+                last_monitor_run["schedule"] = now
+        
+            # AC monitor every 30 seconds (persistent)
+            if now - last_monitor_run["ac"] >= 30:
+                try:
+                    ac_monitor.run()
+                except Exception as e:
+                    print("ACMonitor error:", e)
+                last_monitor_run["ac"] = now
+        
+            # Heater monitor every 30 seconds (persistent)
+            if now - last_monitor_run["heater"] >= 30:
+                try:
+                    heater_monitor.run()
+                except Exception as e:
+                    print("HeaterMonitor error:", e)
+                last_monitor_run["heater"] = now
+        
+            # Inside temperature monitor every 10 seconds (can be stateless)
+            if now - last_monitor_run["inside_temp"] >= 10:
+                from scripts.monitors import TemperatureMonitor
+                inside_monitor = TemperatureMonitor(
+                    sensor=sensors['inside'],
+                    label=SENSOR_CONFIG['inside']['label'],
+                    check_interval=10,
+                    report_interval=30,
+                    alert_high=SENSOR_CONFIG['inside']['alert_high'],
+                    alert_low=SENSOR_CONFIG['inside']['alert_low'],
+                    log_file="/temp_logs.csv",
+                    send_alerts_to_separate_channel=True
+                )
+                inside_monitor.run()
+                del inside_monitor
+                gc.collect()
+                last_monitor_run["inside_temp"] = now
+        
+            # Outside temperature monitor every 10 seconds (can be stateless)
+            if now - last_monitor_run["outside_temp"] >= 10:
+                from scripts.monitors import TemperatureMonitor
+                outside_monitor = TemperatureMonitor(
+                    sensor=sensors['outside'],
+                    label=SENSOR_CONFIG['outside']['label'],
+                    check_interval=10,
+                    report_interval=30,
+                    alert_high=SENSOR_CONFIG['outside']['alert_high'],
+                    alert_low=SENSOR_CONFIG['outside']['alert_low'],
+                    log_file="/temp_logs.csv",
+                    send_alerts_to_separate_channel=False
+                )
+                outside_monitor.run()
+                del outside_monitor
+                gc.collect()
+                last_monitor_run["outside_temp"] = now
+        
+            # Web requests (keep web server loaded if needed)
+            web_server.check_requests(sensors, ac_monitor, heater_monitor, schedule_monitor, config)
+        
+            gc.collect()
             time.sleep(0.1)
+        # ===== END: Main Loop =====
+except KeyboardInterrupt:
+    print("\n" + "="*50)
+    print("Shutting down gracefully...")
+    print("="*50)
+    try:
+        print("Turning off AC...")
+        ac_controller.turn_off()
+    except Exception as e:
+        print("AC shutdown error:", e)
+    try:
+        print("Turning off heater...")
+        heater_controller.turn_off()
+    except Exception as e:
+        print("Heater shutdown error:", e)
+    try:
+        print("Turning off LED...")
+        led.low()
+    except Exception as e:
+        print("LED shutdown error:", e)
+    print("Shutdown complete!")
+    print("="*50)

secrets.example.py

@@ -1,6 +0,0 @@
-secrets = {
-  'ssid': ' Change_to_wifi_SSID',
-  'password': 'Change_to_wifi_Pasword',
-  'discord_webhook_url': 'https://discord.com/api/webhooks/key/long-Combination_1234-ChangeMe',  # normal updates
-  'discord_alert_webhook_url': 'https://discord.com/api/webhooks/key/long-Combination_1234-ChangeMe',  # alerts only
-  }