sse iphone fix 4

DOCKER_GUIDE.md

@@ -0,0 +1,230 @@
+# Docker Guide für Home Automation
+
+Vollständige Anleitung zum Ausführen aller Services mit Docker/finch.
+
+## Quick Start - Alle Services starten
+
+### Linux Server (empfohlen - mit Docker Network)
+
+```bash
+# 1. Images bauen
+docker build -t api:dev -f apps/api/Dockerfile .
+docker build -t ui:dev -f apps/ui/Dockerfile .
+docker build -t abstraction:dev -f apps/abstraction/Dockerfile .
+docker build -t simulator:dev -f apps/simulator/Dockerfile .
+
+# 2. Netzwerk erstellen
+docker network create home-automation
+
+# 3. Abstraction Layer (MQTT Worker)
+docker run -d --name abstraction \
+  --network home-automation \
+  -v $(pwd)/config:/app/config:ro \
+  -e MQTT_BROKER=172.16.2.16 \
+  -e REDIS_HOST=172.23.1.116 \
+  -e REDIS_DB=8 \
+  abstraction:dev
+
+# 4. API Server
+docker run -d --name api \
+  --network home-automation \
+  -p 8001:8001 \
+  -v $(pwd)/config:/app/config:ro \
+  -e MQTT_BROKER=172.16.2.16 \
+  -e REDIS_HOST=172.23.1.116 \
+  -e REDIS_DB=8 \
+  api:dev
+
+# 5. Web UI
+docker run -d --name ui \
+  --network home-automation \
+  -p 8002:8002 \
+  -e API_BASE=http://api:8001 \
+  ui:dev
+
+# 6. Device Simulator (optional)
+docker run -d --name simulator \
+  --network home-automation \
+  -p 8010:8010 \
+  -e MQTT_BROKER=172.16.2.16 \
+  simulator:dev
+```
+
+### macOS mit finch/nerdctl (Alternative)
+
+```bash
+# Images bauen (wie oben)
+
+# Abstraction Layer
+docker run -d --name abstraction \
+  -v $(pwd)/config:/app/config:ro \
+  -e MQTT_BROKER=172.16.2.16 \
+  -e REDIS_HOST=172.23.1.116 \
+  -e REDIS_DB=8 \
+  abstraction:dev
+
+# API Server
+docker run -d --name api \
+  -p 8001:8001 \
+  -v $(pwd)/config:/app/config:ro \
+  -e MQTT_BROKER=172.16.2.16 \
+  -e REDIS_HOST=172.23.1.116 \
+  -e REDIS_DB=8 \
+  api:dev
+
+# Web UI (mit host.docker.internal für macOS)
+docker run -d --name ui \
+  --add-host=host.docker.internal:host-gateway \
+  -p 8002:8002 \
+  -e API_BASE=http://host.docker.internal:8001 \
+  ui:dev
+
+# Device Simulator
+docker run -d --name simulator \
+  -p 8010:8010 \
+  -e MQTT_BROKER=172.16.2.16 \
+  simulator:dev
+```
+
+## Zugriff
+
+- **Web UI**: http://<server-ip>:8002
+- **API Docs**: http://<server-ip>:8001/docs
+- **Simulator**: http://<server-ip>:8010
+
+Auf localhost: `127.0.0.1` oder `localhost`
+
+## finch/nerdctl Besonderheiten
+
+### Port-Binding Verhalten (nur macOS/Windows)
+
+**Standard Docker auf Linux:**
+- `-p 8001:8001` → bindet auf `0.0.0.0:8001` (von überall erreichbar)
+
+**finch/nerdctl auf macOS:**
+- `-p 8001:8001` → bindet auf `127.0.0.1:8001` (nur localhost)
+- Dies ist ein **Security-Feature** von nerdctl
+- **Auf Linux-Servern ist das KEIN Problem!**
+
+### Container-to-Container Kommunikation
+
+**Linux (empfohlen):**
+```bash
+# Docker Network verwenden - Container sprechen sich mit Namen an
+docker network create home-automation
+docker run --network home-automation --name api ...
+docker run --network home-automation -e API_BASE=http://api:8001 ui ...
+```
+
+**macOS mit finch:**
+```bash
+# host.docker.internal verwenden
+docker run --add-host=host.docker.internal:host-gateway \
+  -e API_BASE=http://host.docker.internal:8001 ui ...
+```
+
+## Container verwalten
+
+```bash
+# Alle Container anzeigen
+docker ps
+
+# Logs anschauen
+docker logs api
+docker logs ui -f  # Follow mode
+
+# Container stoppen
+docker stop api ui abstraction simulator
+
+# Container entfernen
+docker rm api ui abstraction simulator
+
+# Alles neu starten
+docker stop api ui abstraction simulator && \
+docker rm api ui abstraction simulator && \
+# ... dann Quick Start Befehle von oben
+```
+
+## Troubleshooting
+
+### UI zeigt "Keine Räume oder Geräte konfiguriert"
+
+**Problem:** UI kann API nicht erreichen
+
+**Linux - Lösung:**
+```bash
+# Verwende Docker Network
+docker network create home-automation
+docker stop ui && docker rm ui
+docker run -d --name ui \
+  --network home-automation \
+  -p 8002:8002 \
+  -e API_BASE=http://api:8001 \
+  ui:dev
+```
+
+**macOS/finch - Lösung:**
+```bash
+docker stop ui && docker rm ui
+docker run -d --name ui \
+  --add-host=host.docker.internal:host-gateway \
+  -p 8002:8002 \
+  -e API_BASE=http://host.docker.internal:8001 \
+  ui:dev
+```
+
+### "Connection refused" in Logs
+
+**Check 1:** Ist die API gestartet?
+```bash
+docker ps | grep api
+curl http://127.0.0.1:8001/health
+```
+
+**Check 2:** Hat UI die richtige API_BASE?
+```bash
+docker inspect ui | grep API_BASE
+```
+
+### Port bereits belegt
+
+```bash
+# Prüfe welcher Prozess Port 8001 nutzt
+lsof -i :8001
+
+# Oder mit netstat
+netstat -an | grep 8001
+
+# Alte Container aufräumen
+docker ps -a | grep -E "api|ui|abstraction|simulator"
+docker rm -f <container-id>
+```
+
+## Produktiv-Deployment
+
+Für Produktion auf **Linux-Servern** empfohlen:
+
+1. **Docker Compose** (siehe `infra/docker-compose.yml`)
+2. **Docker Network** für Service Discovery (siehe Linux Quick Start oben)
+3. **Volume Mounts** für Persistenz
+4. **Health Checks** in Kubernetes/Compose (nicht im Dockerfile)
+
+### Beispiel mit Docker Network (Linux)
+
+```bash
+# Netzwerk erstellen
+docker network create home-automation
+
+# Services starten (alle im gleichen Netzwerk)
+docker run -d --name api --network home-automation \
+  -p 8001:8001 \
+  -v $(pwd)/config:/app/config:ro \
+  api:dev
+
+docker run -d --name ui --network home-automation \
+  -p 8002:8002 \
+  -e API_BASE=http://api:8001 \
+  ui:dev
+```
+
+**Vorteil:** Service Discovery über Container-Namen, keine `--add-host` Tricks nötig.

apps/abstraction/README.md

@@ -32,7 +32,7 @@ docker build -t abstraction:dev -f apps/abstraction/Dockerfile .
 ```bash
 docker run --rm \
   -v $(pwd)/config:/app/config:ro \
-  -e MQTT_BROKER=172.16.2.16 \
+  -e MQTT_BROKER=172.23.1.102 \
   -e MQTT_PORT=1883 \
   -e REDIS_HOST=172.23.1.116 \
   -e REDIS_PORT=6379 \

apps/abstraction/main.py

@@ -16,10 +16,14 @@ from aiomqtt import Client
 from pydantic import ValidationError
 
 from packages.home_capabilities import LightState, ThermostatState
+from apps.abstraction.transformation import (
+    transform_abstract_to_vendor,
+    transform_vendor_to_abstract
+)
 
 # Configure logging
 logging.basicConfig(
-    level=logging.INFO,
+    level=logging.DEBUG,
     format="%(asctime)s - %(name)s - %(levelname)s - %(message)s"
 )
 logger = logging.getLogger(__name__)
@@ -38,8 +42,8 @@ def load_config(config_path: Path) -> dict[str, Any]:
         logger.warning(f"Config file not found: {config_path}, using defaults")
         return {
             "mqtt": {
-                "broker": "172.16.2.16",
-                "port": 1883,
+                "broker": os.getenv("MQTT_BROKER", "localhost"),
+                "port": int(os.getenv("MQTT_PORT", "1883")),
                 "client_id": "home-automation-abstraction",
                 "keepalive": 60
             },
@@ -127,6 +131,7 @@ async def handle_abstract_set(
     mqtt_client: Client,
     device_id: str,
     device_type: str,
+    device_technology: str,
     vendor_topic: str,
     payload: dict[str, Any]
 ) -> None:
@@ -136,21 +141,22 @@ async def handle_abstract_set(
         mqtt_client: MQTT client instance
         device_id: Device identifier
         device_type: Device type (e.g., 'light', 'thermostat')
+        device_technology: Technology identifier (e.g., 'zigbee2mqtt')
         vendor_topic: Vendor-specific SET topic
         payload: Message payload
     """
     # Extract actual payload (remove type wrapper if present)
-    vendor_payload = payload.get("payload", payload)
+    abstract_payload = payload.get("payload", payload)
     
     # Validate payload based on device type
     try:
         if device_type == "light":
             # Validate light SET payload (power and/or brightness)
-            LightState.model_validate(vendor_payload)
+            LightState.model_validate(abstract_payload)
         elif device_type == "thermostat":
             # For thermostat SET: only allow mode and target fields
             allowed_set_fields = {"mode", "target"}
-            invalid_fields = set(vendor_payload.keys()) - allowed_set_fields
+            invalid_fields = set(abstract_payload.keys()) - allowed_set_fields
             if invalid_fields:
                 logger.warning(
                     f"Thermostat SET {device_id} contains invalid fields {invalid_fields}, "
@@ -159,11 +165,14 @@ async def handle_abstract_set(
                 return
             
             # Validate against ThermostatState (current/battery/window_open are optional)
-            ThermostatState.model_validate(vendor_payload)
+            ThermostatState.model_validate(abstract_payload)
     except ValidationError as e:
         logger.error(f"Validation failed for {device_type} SET {device_id}: {e}")
         return
     
+    # Transform abstract payload to vendor-specific format
+    vendor_payload = transform_abstract_to_vendor(device_type, device_technology, abstract_payload)
+    
     vendor_message = json.dumps(vendor_payload)
     
     logger.info(f"→ vendor SET {device_id}: {vendor_topic} ← {vendor_message}")
@@ -175,6 +184,7 @@ async def handle_vendor_state(
     redis_client: aioredis.Redis,
     device_id: str,
     device_type: str,
+    device_technology: str,
     payload: dict[str, Any],
     redis_channel: str = "ui:updates"
 ) -> None:
@@ -185,23 +195,27 @@ async def handle_vendor_state(
         redis_client: Redis client instance
         device_id: Device identifier
         device_type: Device type (e.g., 'light', 'thermostat')
-        payload: State payload
+        device_technology: Technology identifier (e.g., 'zigbee2mqtt')
+        payload: State payload (vendor-specific format)
         redis_channel: Redis channel for UI updates
     """
+    # Transform vendor-specific payload to abstract format
+    abstract_payload = transform_vendor_to_abstract(device_type, device_technology, payload)
+    
     # Validate state payload based on device type
     try:
         if device_type == "light":
-            LightState.model_validate(payload)
+            LightState.model_validate(abstract_payload)
         elif device_type == "thermostat":
             # Validate thermostat state: mode, target, current (required), battery, window_open
-            ThermostatState.model_validate(payload)
+            ThermostatState.model_validate(abstract_payload)
     except ValidationError as e:
         logger.error(f"Validation failed for {device_type} STATE {device_id}: {e}")
         return
     
     # Publish to abstract state topic (retained)
     abstract_topic = f"home/{device_type}/{device_id}/state"
-    abstract_message = json.dumps(payload)
+    abstract_message = json.dumps(abstract_payload)
     
     logger.info(f"← abstract STATE {device_id}: {abstract_topic} → {abstract_message}")
     await mqtt_client.publish(abstract_topic, abstract_message, qos=1, retain=True)
@@ -210,7 +224,7 @@ async def handle_vendor_state(
     ui_update = {
         "type": "state",
         "device_id": device_id,
-        "payload": payload,
+        "payload": abstract_payload,
         "ts": datetime.now(timezone.utc).isoformat()
     }
     redis_message = json.dumps(ui_update)
@@ -227,8 +241,8 @@ async def mqtt_worker(config: dict[str, Any], redis_client: aioredis.Redis) -> N
         redis_client: Redis client for UI updates
     """
     mqtt_config = config.get("mqtt", {})
-    broker = mqtt_config.get("broker", "172.16.2.16")
-    port = mqtt_config.get("port", 1883)
+    broker = os.getenv("MQTT_BROKER") or mqtt_config.get("broker", "localhost")
+    port = int(os.getenv("MQTT_PORT", mqtt_config.get("port", 1883)))
     client_id = mqtt_config.get("client_id", "home-automation-abstraction")
     # Append a short suffix (ENV override possible) so multiple processes don't collide
     client_suffix = os.environ.get("MQTT_CLIENT_ID_SUFFIX") or uuid.uuid4().hex[:6]
@@ -297,8 +311,9 @@ async def mqtt_worker(config: dict[str, Any], redis_client: aioredis.Redis) -> N
                             if device_id in devices:
                                 device = devices[device_id]
                                 vendor_topic = device["topics"]["set"]
+                                device_technology = device.get("technology", "unknown")
                                 await handle_abstract_set(
-                                    client, device_id, device_type, vendor_topic, payload
+                                    client, device_id, device_type, device_technology, vendor_topic, payload
                                 )
                     
                     # Check if this is a vendor STATE message
@@ -306,8 +321,10 @@ async def mqtt_worker(config: dict[str, Any], redis_client: aioredis.Redis) -> N
                         # Find device by vendor state topic
                         for device_id, device in devices.items():
                             if topic == device["topics"]["state"]:
+                                device_technology = device.get("technology", "unknown")
                                 await handle_vendor_state(
-                                    client, redis_client, device_id, device["type"], payload, redis_channel
+                                    client, redis_client, device_id, device["type"], 
+                                    device_technology, payload, redis_channel
                                 )
                                 break
                         

apps/abstraction/transformation.py

@@ -0,0 +1,237 @@
+"""Payload transformation functions for vendor-specific device communication.
+
+This module implements a registry-pattern for vendor-specific transformations:
+- Each (device_type, technology, direction) tuple maps to a specific handler function
+- Handlers transform payloads between abstract and vendor-specific formats
+- Unknown combinations fall back to pass-through (no transformation)
+"""
+
+import logging
+from typing import Any, Callable
+
+logger = logging.getLogger(__name__)
+
+
+# ============================================================================
+# HANDLER FUNCTIONS: simulator technology
+# ============================================================================
+
+def _transform_light_simulator_to_vendor(payload: dict[str, Any]) -> dict[str, Any]:
+    """Transform abstract light payload to simulator format.
+    
+    Simulator uses same format as abstract protocol (no transformation needed).
+    """
+    return payload
+
+
+def _transform_light_simulator_to_abstract(payload: dict[str, Any]) -> dict[str, Any]:
+    """Transform simulator light payload to abstract format.
+    
+    Simulator uses same format as abstract protocol (no transformation needed).
+    """
+    return payload
+
+
+def _transform_thermostat_simulator_to_vendor(payload: dict[str, Any]) -> dict[str, Any]:
+    """Transform abstract thermostat payload to simulator format.
+    
+    Simulator uses same format as abstract protocol (no transformation needed).
+    """
+    return payload
+
+
+def _transform_thermostat_simulator_to_abstract(payload: dict[str, Any]) -> dict[str, Any]:
+    """Transform simulator thermostat payload to abstract format.
+    
+    Simulator uses same format as abstract protocol (no transformation needed).
+    """
+    return payload
+
+
+# ============================================================================
+# HANDLER FUNCTIONS: zigbee2mqtt technology
+# ============================================================================
+
+def _transform_light_zigbee2mqtt_to_vendor(payload: dict[str, Any]) -> dict[str, Any]:
+    """Transform abstract light payload to zigbee2mqtt format.
+    
+    Transformations:
+    - power: 'on'/'off' -> state: 'ON'/'OFF'
+    - brightness: 0-100 -> brightness: 0-254
+    
+    Example:
+    - Abstract: {'power': 'on', 'brightness': 100}
+    - zigbee2mqtt: {'state': 'ON', 'brightness': 254}
+    """
+    vendor_payload = payload.copy()
+    
+    # Transform power -> state with uppercase values
+    if "power" in vendor_payload:
+        power_value = vendor_payload.pop("power")
+        vendor_payload["state"] = power_value.upper() if isinstance(power_value, str) else power_value
+    
+    # Transform brightness: 0-100 (%) -> 0-254 (zigbee2mqtt range)
+    if "brightness" in vendor_payload:
+        abstract_brightness = vendor_payload["brightness"]
+        if isinstance(abstract_brightness, (int, float)):
+            # Convert percentage (0-100) to zigbee2mqtt range (0-254)
+            vendor_payload["brightness"] = round(abstract_brightness * 254 / 100)
+    
+    return vendor_payload
+
+
+def _transform_light_zigbee2mqtt_to_abstract(payload: dict[str, Any]) -> dict[str, Any]:
+    """Transform zigbee2mqtt light payload to abstract format.
+    
+    Transformations:
+    - state: 'ON'/'OFF' -> power: 'on'/'off'
+    - brightness: 0-254 -> brightness: 0-100
+    
+    Example:
+    - zigbee2mqtt: {'state': 'ON', 'brightness': 254}
+    - Abstract: {'power': 'on', 'brightness': 100}
+    """
+    abstract_payload = payload.copy()
+    
+    # Transform state -> power with lowercase values
+    if "state" in abstract_payload:
+        state_value = abstract_payload.pop("state")
+        abstract_payload["power"] = state_value.lower() if isinstance(state_value, str) else state_value
+    
+    # Transform brightness: 0-254 (zigbee2mqtt range) -> 0-100 (%)
+    if "brightness" in abstract_payload:
+        vendor_brightness = abstract_payload["brightness"]
+        if isinstance(vendor_brightness, (int, float)):
+            # Convert zigbee2mqtt range (0-254) to percentage (0-100)
+            abstract_payload["brightness"] = round(vendor_brightness * 100 / 254)
+    
+    return abstract_payload
+
+
+def _transform_thermostat_zigbee2mqtt_to_vendor(payload: dict[str, Any]) -> dict[str, Any]:
+    """Transform abstract thermostat payload to zigbee2mqtt format.
+    
+    zigbee2mqtt uses same format as abstract protocol (no transformation needed).
+    """
+    return payload
+
+
+def _transform_thermostat_zigbee2mqtt_to_abstract(payload: dict[str, Any]) -> dict[str, Any]:
+    """Transform zigbee2mqtt thermostat payload to abstract format.
+    
+    zigbee2mqtt uses same format as abstract protocol (no transformation needed).
+    """
+    return payload
+
+
+# ============================================================================
+# REGISTRY: Maps (device_type, technology, direction) -> handler function
+# ============================================================================
+
+TransformHandler = Callable[[dict[str, Any]], dict[str, Any]]
+
+TRANSFORM_HANDLERS: dict[tuple[str, str, str], TransformHandler] = {
+    # Light transformations
+    ("light", "simulator", "to_vendor"): _transform_light_simulator_to_vendor,
+    ("light", "simulator", "to_abstract"): _transform_light_simulator_to_abstract,
+    ("light", "zigbee2mqtt", "to_vendor"): _transform_light_zigbee2mqtt_to_vendor,
+    ("light", "zigbee2mqtt", "to_abstract"): _transform_light_zigbee2mqtt_to_abstract,
+    
+    # Thermostat transformations
+    ("thermostat", "simulator", "to_vendor"): _transform_thermostat_simulator_to_vendor,
+    ("thermostat", "simulator", "to_abstract"): _transform_thermostat_simulator_to_abstract,
+    ("thermostat", "zigbee2mqtt", "to_vendor"): _transform_thermostat_zigbee2mqtt_to_vendor,
+    ("thermostat", "zigbee2mqtt", "to_abstract"): _transform_thermostat_zigbee2mqtt_to_abstract,
+}
+
+
+def _get_transform_handler(
+    device_type: str,
+    device_technology: str,
+    direction: str
+) -> TransformHandler:
+    """Get transformation handler for given device type, technology and direction.
+    
+    Args:
+        device_type: Type of device (e.g., "light", "thermostat")
+        device_technology: Technology/vendor (e.g., "simulator", "zigbee2mqtt")
+        direction: Transformation direction ("to_vendor" or "to_abstract")
+    
+    Returns:
+        Handler function for transformation, or pass-through if not found
+    """
+    key = (device_type, device_technology, direction)
+    handler = TRANSFORM_HANDLERS.get(key)
+    
+    if handler is None:
+        logger.warning(
+            f"No transformation handler for {key}, using pass-through. "
+            f"Available: {list(TRANSFORM_HANDLERS.keys())}"
+        )
+        return lambda payload: payload  # Pass-through fallback
+    
+    return handler
+
+
+# ============================================================================
+# PUBLIC API: Main transformation functions
+# ============================================================================
+
+def transform_abstract_to_vendor(
+    device_type: str,
+    device_technology: str,
+    abstract_payload: dict[str, Any]
+) -> dict[str, Any]:
+    """Transform abstract payload to vendor-specific format.
+    
+    Args:
+        device_type: Type of device (e.g., "light", "thermostat")
+        device_technology: Technology/vendor (e.g., "simulator", "zigbee2mqtt")
+        abstract_payload: Payload in abstract home protocol format
+    
+    Returns:
+        Payload in vendor-specific format
+    """
+    logger.debug(
+        f"transform_abstract_to_vendor IN: type={device_type}, tech={device_technology}, "
+        f"payload={abstract_payload}"
+    )
+    
+    handler = _get_transform_handler(device_type, device_technology, "to_vendor")
+    vendor_payload = handler(abstract_payload)
+    
+    logger.debug(
+        f"transform_abstract_to_vendor OUT: type={device_type}, tech={device_technology}, "
+        f"payload={vendor_payload}"
+    )
+    return vendor_payload
+
+
+def transform_vendor_to_abstract(
+    device_type: str,
+    device_technology: str,
+    vendor_payload: dict[str, Any]
+) -> dict[str, Any]:
+    """Transform vendor-specific payload to abstract format.
+    
+    Args:
+        device_type: Type of device (e.g., "light", "thermostat")
+        device_technology: Technology/vendor (e.g., "simulator", "zigbee2mqtt")
+        vendor_payload: Payload in vendor-specific format
+    
+    Returns:
+        Payload in abstract home protocol format
+    """
+    logger.debug(
+        f"transform_vendor_to_abstract IN: type={device_type}, tech={device_technology}, "
+        f"payload={vendor_payload}"
+    )
+    
+    handler = _get_transform_handler(device_type, device_technology, "to_abstract")
+    abstract_payload = handler(vendor_payload)
+    
+    logger.debug(
+        f"transform_vendor_to_abstract OUT: type={device_type}, tech={device_technology}, "
+        f"payload={abstract_payload}"
+    )
+    return abstract_payload

apps/api/README.md

@@ -42,7 +42,7 @@ docker build -t api:dev -f apps/api/Dockerfile .
 ```bash
 docker run --rm -p 8001:8001 \
   -v $(pwd)/config:/app/config:ro \
-  -e MQTT_BROKER=172.16.2.16 \
+  -e MQTT_BROKER=172.23.1.102 \
   -e MQTT_PORT=1883 \
   -e REDIS_HOST=172.23.1.116 \
   -e REDIS_PORT=6379 \
@@ -51,6 +51,23 @@ docker run --rm -p 8001:8001 \
   api:dev
 ```
 
+**Mit Docker Network (empfohlen für Linux):**
+```bash
+docker network create home-automation
+docker run --rm -p 8001:8001 \
+  --network home-automation \
+  --name api \
+  -v $(pwd)/config:/app/config:ro \
+  -e MQTT_BROKER=172.16.2.16 \
+  -e REDIS_HOST=172.23.1.116 \
+  -e REDIS_DB=8 \
+  api:dev
+```
+
+**Hinweise:**
+- **Linux**: Port wird auf `0.0.0.0:8001` gebunden (von überall erreichbar)
+- **macOS/finch**: Port wird auf `127.0.0.1:8001` gebunden (nur localhost)
+
 #### Environment Variables
 
 | Variable | Default | Description |

apps/api/main.py

@@ -19,6 +19,13 @@ from packages.home_capabilities import LIGHT_VERSION, THERMOSTAT_VERSION, LightS
 
 logger = logging.getLogger(__name__)
 
+# In-memory cache for last known device states
+# Will be populated from Redis pub/sub messages
+device_states: dict[str, dict[str, Any]] = {}
+
+# Background task reference
+background_task: asyncio.Task | None = None
+
 app = FastAPI(
     title="Home Automation API",
     description="API for home automation system",
@@ -30,6 +37,7 @@ app.add_middleware(
     CORSMiddleware,
     allow_origins=[
         "http://localhost:8002",
+        "http://172.19.1.11:8002",
         "http://127.0.0.1:8002",
     ],
     allow_credentials=True,
@@ -48,6 +56,77 @@ async def health() -> dict[str, str]:
     return {"status": "ok"}
 
 
+async def redis_state_listener():
+    """Background task that listens to Redis pub/sub and updates state cache."""
+    redis_client = None
+    pubsub = None
+    
+    try:
+        redis_url, redis_channel = get_redis_settings()
+        logger.info(f"Starting Redis state listener for channel {redis_channel}")
+        
+        redis_client = await aioredis.from_url(redis_url, decode_responses=True)
+        pubsub = redis_client.pubsub()
+        await pubsub.subscribe(redis_channel)
+        
+        logger.info("Redis state listener connected")
+        
+        while True:
+            try:
+                message = await asyncio.wait_for(
+                    pubsub.get_message(ignore_subscribe_messages=True),
+                    timeout=1.0
+                )
+                
+                if message and message["type"] == "message":
+                    data = message["data"]
+                    try:
+                        state_data = json.loads(data)
+                        if state_data.get("type") == "state" and state_data.get("device_id"):
+                            device_id = state_data["device_id"]
+                            payload = state_data.get("payload", {})
+                            device_states[device_id] = payload
+                            logger.debug(f"Updated state cache for {device_id}: {payload}")
+                    except Exception as e:
+                        logger.warning(f"Failed to parse state data: {e}")
+                        
+            except asyncio.TimeoutError:
+                pass  # No message, continue
+                
+    except asyncio.CancelledError:
+        logger.info("Redis state listener cancelled")
+        raise
+    except Exception as e:
+        logger.error(f"Redis state listener error: {e}")
+    finally:
+        if pubsub:
+            await pubsub.unsubscribe(redis_channel)
+            await pubsub.close()
+        if redis_client:
+            await redis_client.close()
+
+
+@app.on_event("startup")
+async def startup_event():
+    """Start background tasks on application startup."""
+    global background_task
+    background_task = asyncio.create_task(redis_state_listener())
+    logger.info("Started background Redis state listener")
+
+
+@app.on_event("shutdown")
+async def shutdown_event():
+    """Clean up background tasks on application shutdown."""
+    global background_task
+    if background_task:
+        background_task.cancel()
+        try:
+            await background_task
+        except asyncio.CancelledError:
+            pass
+        logger.info("Stopped background Redis state listener")
+
+
 @app.get("/spec")
 async def spec() -> dict[str, dict[str, str]]:
     """Capability specification endpoint.
@@ -181,6 +260,16 @@ async def get_devices() -> list[DeviceInfo]:
     ]
 
 
+@app.get("/devices/states")
+async def get_device_states() -> dict[str, dict[str, Any]]:
+    """Get current states of all devices from in-memory cache.
+    
+    Returns:
+        dict: Dictionary mapping device_id to state payload
+    """
+    return device_states
+
+
 @app.get("/layout")
 async def get_layout() -> dict[str, Any]:
     """Get UI layout configuration.
@@ -286,7 +375,13 @@ async def set_device(device_id: str, request: SetDeviceRequest) -> dict[str, str
 
 
 async def event_generator(request: Request) -> AsyncGenerator[str, None]:
-    """Generate SSE events from Redis Pub/Sub.
+    """Generate SSE events from Redis Pub/Sub with Safari compatibility.
+    
+    Safari-compatible features:
+    - Immediate retry hint on connection
+    - Regular heartbeats every 15s (comment-only, no data)
+    - Proper flushing after each yield
+    - Graceful disconnect handling
     
     Args:
         request: FastAPI request object for disconnect detection
@@ -294,70 +389,125 @@ async def event_generator(request: Request) -> AsyncGenerator[str, None]:
     Yields:
         str: SSE formatted event strings
     """
-    redis_url, redis_channel = get_redis_settings()
-    redis_client = await aioredis.from_url(redis_url, decode_responses=True)
-    pubsub = redis_client.pubsub()
+    redis_client = None
+    pubsub = None
     
     try:
-        await pubsub.subscribe(redis_channel)
+        # Send retry hint immediately for EventSource reconnect behavior
+        yield "retry: 2500\n\n"
         
-        # Create heartbeat task
+        # Try to connect to Redis
+        redis_url, redis_channel = get_redis_settings()
+        try:
+            redis_client = await aioredis.from_url(redis_url, decode_responses=True)
+            pubsub = redis_client.pubsub()
+            await pubsub.subscribe(redis_channel)
+            logger.info(f"SSE client connected, subscribed to {redis_channel}")
+        except Exception as e:
+            logger.warning(f"Redis unavailable, running in heartbeat-only mode: {e}")
+            redis_client = None
+            pubsub = None
+        
+        # Heartbeat tracking
         last_heartbeat = asyncio.get_event_loop().time()
+        heartbeat_interval = 15  # Safari-friendly: shorter interval
         
         while True:
             # Check if client disconnected
             if await request.is_disconnected():
+                logger.info("SSE client disconnected")
                 break
             
-            # Get message with timeout for heartbeat
-            try:
-                message = await asyncio.wait_for(
-                    pubsub.get_message(ignore_subscribe_messages=True),
-                    timeout=1.0
-                )
-                
-                if message and message["type"] == "message":
-                    # Send data event
-                    data = message["data"]
-                    yield f"event: message\ndata: {data}\n\n"
-                    last_heartbeat = asyncio.get_event_loop().time()
-                
-            except asyncio.TimeoutError:
-                pass
+            # Try to get message from Redis (if available)
+            if pubsub:
+                try:
+                    message = await asyncio.wait_for(
+                        pubsub.get_message(ignore_subscribe_messages=True),
+                        timeout=0.1
+                    )
+                    
+                    if message and message["type"] == "message":
+                        data = message["data"]
+                        logger.debug(f"Sending SSE message: {data[:100]}...")
+                        
+                        # Update in-memory cache with latest state
+                        try:
+                            state_data = json.loads(data)
+                            if state_data.get("type") == "state" and state_data.get("device_id"):
+                                device_states[state_data["device_id"]] = state_data.get("payload", {})
+                        except Exception as e:
+                            logger.warning(f"Failed to parse state data for cache: {e}")
+                        
+                        yield f"event: message\ndata: {data}\n\n"
+                        last_heartbeat = asyncio.get_event_loop().time()
+                        continue  # Skip sleep, check for more messages immediately
+                        
+                except asyncio.TimeoutError:
+                    pass  # No message, continue to heartbeat check
+                except Exception as e:
+                    logger.error(f"Redis error: {e}")
+                    # Continue with heartbeats even if Redis fails
             
-            # Send heartbeat every 25 seconds
+            # Sleep briefly to avoid busy loop
+            await asyncio.sleep(0.1)
+            
+            # Send heartbeat if interval elapsed
             current_time = asyncio.get_event_loop().time()
-            if current_time - last_heartbeat >= 25:
-                yield "event: ping\ndata: heartbeat\n\n"
+            if current_time - last_heartbeat >= heartbeat_interval:
+                # Comment-style ping (Safari-compatible, no event type)
+                yield ": ping\n\n"
                 last_heartbeat = current_time
             
+    except asyncio.CancelledError:
+        logger.info("SSE connection cancelled by client")
+        raise
+    except Exception as e:
+        logger.error(f"SSE error: {e}")
+        raise
     finally:
-        await pubsub.unsubscribe(redis_channel)
-        await pubsub.close()
-        await redis_client.close()
+        # Cleanup Redis connection
+        if pubsub:
+            try:
+                await pubsub.unsubscribe(redis_channel)
+                await pubsub.aclose()
+            except Exception as e:
+                logger.error(f"Error closing pubsub: {e}")
+        
+        if redis_client:
+            try:
+                await redis_client.aclose()
+            except Exception as e:
+                logger.error(f"Error closing redis: {e}")
+        
+        logger.info("SSE connection closed")
 
 
 @app.get("/realtime")
 async def realtime_events(request: Request) -> StreamingResponse:
     """Server-Sent Events endpoint for real-time updates.
     
+    Safari-compatible SSE implementation:
+    - Immediate retry hint (2.5s reconnect delay)
+    - Heartbeat every 15s using comment syntax ": ping"
+    - Proper Cache-Control headers
+    - No buffering (nginx compatibility)
+    - Graceful Redis fallback (heartbeat-only mode)
+    
     Args:
         request: FastAPI request object
         
     Returns:
-        StreamingResponse: SSE stream of Redis messages
+        StreamingResponse: SSE stream with Redis messages and heartbeats
     """
     return StreamingResponse(
         event_generator(request),
         media_type="text/event-stream",
         headers={
-            "Cache-Control": "no-cache",
+            "Cache-Control": "no-cache, no-transform",
             "Connection": "keep-alive",
             "X-Accel-Buffering": "no",  # Disable nginx buffering
         }
     )
-    
-    return {"message": f"Command sent to {device_id}"}
 
 
 def main() -> None:

apps/simulator/README.md

@@ -53,12 +53,20 @@ docker build -t simulator:dev -f apps/simulator/Dockerfile .
 
 ```bash
 docker run --rm -p 8010:8010 \
-  -e MQTT_BROKER=172.16.2.16 \
+  -e MQTT_BROKER=172.23.1.102 \
   -e MQTT_PORT=1883 \
   -e SIM_PORT=8010 \
   simulator:dev
 ```
 
+**Mit Docker Network (optional):**
+```bash
+docker run --rm -p 8010:8010 \
+  --name simulator \
+  -e MQTT_BROKER=172.23.1.102 \
+  simulator:dev
+```
+
 #### Environment Variables
 
 | Variable | Default | Description |

apps/ui/README.md

@@ -37,14 +37,32 @@ docker build -t ui:dev -f apps/ui/Dockerfile .
 
 #### Run Container
 
+**Linux Server (empfohlen):**
 ```bash
+# Mit Docker Network für Container-to-Container Kommunikation
 docker run --rm -p 8002:8002 \
   -e UI_PORT=8002 \
-  -e API_BASE=http://localhost:8001 \
+  -e API_BASE=http://172.19.1.11:8001 \
   -e BASE_PATH=/ \
   ui:dev
 ```
 
+**macOS mit finch/nerdctl:**
+```bash
+docker run --rm -p 8002:8002 \
+  --add-host=host.docker.internal:host-gateway \
+  -e UI_PORT=8002 \
+  -e API_BASE=http://host.docker.internal:8001 \
+  -e BASE_PATH=/ \
+  ui:dev
+```
+
+**Hinweise:**
+- **Linux**: Verwende Docker Network und Service-Namen (`http://api:8001`)
+- **macOS/finch**: Verwende `host.docker.internal` mit `--add-host` flag
+- Die UI macht Server-Side API-Aufrufe beim Rendern der Seite
+- Browser-seitige Realtime-Updates (SSE) gehen direkt vom Browser zur API
+
 #### Environment Variables
 
 | Variable | Default | Description |

apps/ui/templates/dashboard.html

@@ -29,6 +29,16 @@
             padding: 2rem;
             box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
             margin-bottom: 2rem;
+            display: flex;
+            justify-content: space-between;
+            align-items: flex-start;
+            gap: 1rem;
+            flex-wrap: wrap;
+        }
+        
+        .header-content {
+            flex: 1;
+            min-width: 200px;
         }
         
         h1 {
@@ -36,6 +46,65 @@
             margin-bottom: 0.5rem;
         }
         
+        .header-buttons {
+            display: flex;
+            gap: 0.5rem;
+            align-items: center;
+        }
+        
+        .refresh-btn,
+        .collapse-all-btn {
+            padding: 0.75rem;
+            background: #667eea;
+            color: white;
+            border: none;
+            border-radius: 8px;
+            cursor: pointer;
+            transition: all 0.2s;
+            min-height: 44px;
+            min-width: 44px;
+            display: flex;
+            align-items: center;
+            justify-content: center;
+        }
+        
+        .refresh-btn:hover,
+        .collapse-all-btn:hover {
+            background: #5568d3;
+            transform: translateY(-1px);
+            box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
+        }
+        
+        .refresh-btn:active,
+        .collapse-all-btn:active {
+            transform: translateY(0);
+        }
+        
+        .refresh-icon {
+            font-size: 1.5rem;
+            line-height: 1;
+            transition: transform 0.3s;
+        }
+        
+        .refresh-icon.spinning {
+            animation: spin 0.6s linear;
+        }
+        
+        @keyframes spin {
+            from { transform: rotate(0deg); }
+            to { transform: rotate(360deg); }
+        }
+        
+        .collapse-all-icon {
+            font-size: 1.25rem;
+            transition: transform 0.3s;
+            line-height: 1;
+        }
+        
+        .collapse-all-icon.collapsed {
+            transform: rotate(-90deg);
+        }
+        
         .status {
             display: inline-block;
             padding: 0.25rem 0.75rem;
@@ -55,14 +124,69 @@
         }
         
         .room {
-            margin-bottom: 2rem;
+            background: white;
+            border-radius: 20px;
+            margin-bottom: 1rem;
+            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
+            overflow: hidden;
+            transition: box-shadow 0.2s;
+        }
+        
+        .room:hover {
+            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
+        }
+        
+        .room-header {
+            padding: 1.5rem 2rem;
+            cursor: pointer;
+            display: flex;
+            align-items: center;
+            justify-content: space-between;
+            background: white;
+            transition: background-color 0.2s;
+            user-select: none;
+        }
+        
+        .room-header:hover {
+            background: #f8f9fa;
+        }
+        
+        .room-header:active {
+            background: #e9ecef;
         }
         
         .room-title {
-            color: white;
+            color: #333;
             font-size: 1.5rem;
-            margin-bottom: 1rem;
-            text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
+            font-weight: 700;
+            display: flex;
+            align-items: center;
+            gap: 0.75rem;
+            margin: 0;
+        }
+        
+        .room-toggle {
+            font-size: 1.5rem;
+            color: #667eea;
+            transition: transform 0.3s;
+            line-height: 1;
+        }
+        
+        .room-toggle.collapsed {
+            transform: rotate(-90deg);
+        }
+        
+        .room-content {
+            padding: 0 2rem 2rem 2rem;
+            max-height: 5000px;
+            overflow: hidden;
+            transition: max-height 0.3s ease-out, padding 0.3s ease-out;
+        }
+        
+        .room-content.collapsed {
+            max-height: 0;
+            padding-top: 0;
+            padding-bottom: 0;
         }
         
         .devices {
@@ -379,16 +503,30 @@
 <body>
     <div class="container">
         <header>
-            <h1>🏠 Home Automation</h1>
-            <p>Realtime Status: <span class="status disconnected" id="connection-status">Verbinde...</span></p>
+            <div class="header-content">
+                <h1>🏠 Home Automation</h1>
+                <p>Realtime Status: <span class="status disconnected" id="connection-status">Verbinde...</span></p>
+            </div>
+            <div class="header-buttons">
+                <button class="refresh-btn" onclick="refreshPage()" title="Seite aktualisieren">
+                    <span class="refresh-icon" id="refresh-icon">↻</span>
+                </button>
+                <button class="collapse-all-btn" onclick="toggleAllRooms()" title="Alle Räume ein-/ausklappen">
+                    <span class="collapse-all-icon" id="collapse-all-icon">▼</span>
+                </button>
+            </div>
         </header>
         
         {% if rooms %}
             {% for room in rooms %}
             <section class="room">
-                <h2 class="room-title">{{ room.name }}</h2>
+                <div class="room-header" onclick="toggleRoom('room-{{ loop.index }}')">
+                    <h2 class="room-title">{{ room.name }}</h2>
+                    <span class="room-toggle" id="toggle-room-{{ loop.index }}">▼</span>
+                </div>
                 
-                <div class="devices">
+                <div class="room-content" id="room-{{ loop.index }}">
+                    <div class="devices">
                     {% for device in room.devices %}
                     <div class="device-card" data-device-id="{{ device.device_id }}">
                         <div class="device-header">
@@ -500,6 +638,7 @@
                         {% endif %}
                     </div>
                     {% endfor %}
+                    </div>
                 </div>
             </section>
             {% endfor %}
@@ -519,14 +658,106 @@
     </div>
     
     <script>
+        // Toggle room visibility
+        function toggleRoom(roomId) {
+            const content = document.getElementById(roomId);
+            const toggle = document.getElementById(`toggle-${roomId}`);
+            
+            if (content && toggle) {
+                content.classList.toggle('collapsed');
+                toggle.classList.toggle('collapsed');
+            }
+        }
+        
+        // Refresh page with animation
+        function refreshPage() {
+            const icon = document.getElementById('refresh-icon');
+            icon.classList.add('spinning');
+            
+            // Reload page after brief animation
+            setTimeout(() => {
+                window.location.reload();
+            }, 300);
+        }
+        
+        // Toggle all rooms
+        function toggleAllRooms() {
+            const allContents = document.querySelectorAll('.room-content');
+            const allToggles = document.querySelectorAll('.room-toggle');
+            const buttonIcon = document.getElementById('collapse-all-icon');
+            
+            // Check if any room is expanded
+            const anyExpanded = Array.from(allContents).some(content => !content.classList.contains('collapsed'));
+            
+            if (anyExpanded) {
+                // Collapse all
+                allContents.forEach(content => content.classList.add('collapsed'));
+                allToggles.forEach(toggle => toggle.classList.add('collapsed'));
+                buttonIcon.classList.add('collapsed');
+            } else {
+                // Expand all
+                allContents.forEach(content => content.classList.remove('collapsed'));
+                allToggles.forEach(toggle => toggle.classList.remove('collapsed'));
+                buttonIcon.classList.remove('collapsed');
+            }
+        }
+        
+        // Set room icons based on room name
+        document.addEventListener('DOMContentLoaded', () => {
+            const roomTitles = document.querySelectorAll('.room-title');
+            roomTitles.forEach(title => {
+                const roomName = title.textContent.trim().toLowerCase();
+                let icon = '🏠'; // Default
+                
+                if (roomName.includes('wohn') || roomName.includes('living')) icon = '🛋️';
+                else if (roomName.includes('schlaf') || roomName.includes('bed')) icon = '🛏️';
+                else if (roomName.includes('küch') || roomName.includes('kitchen')) icon = '🍳';
+                else if (roomName.includes('bad') || roomName.includes('bath')) icon = '🛁';
+                else if (roomName.includes('büro') || roomName.includes('office')) icon = '💼';
+                else if (roomName.includes('kind') || roomName.includes('child')) icon = '🧸';
+                else if (roomName.includes('garten') || roomName.includes('garden')) icon = '🌿';
+                else if (roomName.includes('garage')) icon = '🚗';
+                else if (roomName.includes('keller') || roomName.includes('basement')) icon = '📦';
+                else if (roomName.includes('dach') || roomName.includes('attic')) icon = '🏚️';
+                
+                // Replace the ::before pseudo-element with actual emoji
+                const originalText = title.textContent.trim();
+                title.innerHTML = `${icon} ${originalText}`;
+            });
+        });
+        
+        // Clean up SSE connection before page unload
+        window.addEventListener('beforeunload', () => {
+            if (eventSource) {
+                console.log('Closing SSE connection before unload');
+                eventSource.close();
+                eventSource = null;
+            }
+        });
+        
         // API_BASE injected from backend (supports Docker/K8s environments)
         window.API_BASE = '{{ api_base }}';
+        window.RUNTIME_CONFIG = window.RUNTIME_CONFIG || {};
         
         // Helper function to construct API URLs
         function api(url) {
             return `${window.API_BASE}${url}`;
         }
         
+        // iOS/Safari Polyfill laden (nur wenn nötig)
+        (function() {
+            var isIOS = /iP(hone|od|ad)/.test(navigator.platform) || 
+                        (navigator.userAgent.includes("Mac") && "ontouchend" in document);
+            if (isIOS && typeof window.EventSourcePolyfill === "undefined") {
+                var s = document.createElement("script");
+                s.src = "https://cdn.jsdelivr.net/npm/event-source-polyfill@1.0.31/src/eventsource.min.js";
+                s.onerror = function() {
+                    console.warn("EventSource polyfill konnte nicht geladen werden");
+                };
+                document.head.appendChild(s);
+            }
+        })();
+        
         let eventSource = null;
         let currentState = {};
         let thermostatTargets = {};
@@ -634,7 +865,6 @@
                 });
                 
                 if (response.ok) {
-                    thermostatTargets[deviceId] = newTarget;
                     console.log(`Sent target ${newTarget} to ${deviceId}`);
                     addEvent({
                         action: 'target_adjusted',
@@ -699,6 +929,8 @@
                     toggleButton.textContent = 'Einschalten';
                     toggleButton.className = 'toggle-button off';
                 }
+                // Force reflow for iOS Safari
+                void toggleButton.offsetHeight;
             }
             
             // Update brightness display and slider
@@ -782,77 +1014,179 @@
             }
         }
         
-        // Connect to SSE
-        function connectSSE() {
-            eventSource = new EventSource(api('/realtime'));
+        // Safari/iOS-kompatibler SSE Client mit Auto-Reconnect
+        let reconnectDelay = 2500;
+        let reconnectTimer = null;
+        
+        // Global handleSSE function für SSE-Nachrichten
+        window.handleSSE = function(data) {
+            console.log('SSE message:', data);
             
-            eventSource.onopen = () => {
-                console.log('SSE connected');
-                document.getElementById('connection-status').textContent = 'Verbunden';
-                document.getElementById('connection-status').className = 'status connected';
-            };
+            addEvent(data);
             
-            eventSource.addEventListener('message', (e) => {
-                const data = JSON.parse(e.data);
-                console.log('SSE message:', data);
-                
-                addEvent(data);
-                
-                // Update device state
-                if (data.type === 'state' && data.device_id && data.payload) {
-                    const card = document.querySelector(`[data-device-id="${data.device_id}"]`);
-                    
-                    // Check if it's a light
-                    if (data.payload.power !== undefined) {
-                        updateDeviceUI(
-                            data.device_id, 
-                            data.payload.power, 
-                            data.payload.brightness
-                        );
-                    }
-                    
-                    // Check if it's a thermostat
-                    if (data.payload.mode !== undefined || data.payload.target !== undefined || data.payload.current !== undefined) {
-                        updateThermostatUI(
-                            data.device_id,
-                            data.payload.current,
-                            data.payload.target,
-                            data.payload.mode
-                        );
-                    }
+            // Update device state
+            if (data.type === 'state' && data.device_id && data.payload) {
+                const card = document.querySelector(`[data-device-id="${data.device_id}"]`);
+                if (!card) {
+                    console.warn(`No card found for device ${data.device_id}`);
+                    return;
                 }
-            });
-            
-            eventSource.addEventListener('ping', (e) => {
-                console.log('Heartbeat received');
-            });
-            
-            eventSource.onerror = (error) => {
-                console.error('SSE error:', error);
-                document.getElementById('connection-status').textContent = 'Getrennt';
-                document.getElementById('connection-status').className = 'status disconnected';
-                eventSource.close();
                 
-                // Reconnect after 5 seconds
-                setTimeout(connectSSE, 5000);
-            };
-        }
+                // Check if it's a light
+                if (data.payload.power !== undefined) {
+                    currentState[data.device_id] = data.payload.power;
+                    updateDeviceUI(
+                        data.device_id, 
+                        data.payload.power, 
+                        data.payload.brightness
+                    );
+                }
+                
+                // Check if it's a thermostat
+                if (data.payload.mode !== undefined || data.payload.target !== undefined || data.payload.current !== undefined) {
+                    if (data.payload.mode !== undefined) {
+                        thermostatModes[data.device_id] = data.payload.mode;
+                    }
+                    if (data.payload.target !== undefined) {
+                        thermostatTargets[data.device_id] = data.payload.target;
+                    }
+                    updateThermostatUI(
+                        data.device_id,
+                        data.payload.current,
+                        data.payload.target,
+                        data.payload.mode
+                    );
+                }
+            }
+        };
         
-        // Initialize
-        connectSSE();
-        
-        // Optional: Load initial state from API
-        async function loadDevices() {
-            try {
-                const response = await fetch(api('/devices'));
-                const devices = await response.json();
-                console.log('Loaded devices:', devices);
-            } catch (error) {
-                console.error('Failed to load devices:', error);
+        function cleanupSSE() {
+            if (eventSource) {
+                try { 
+                    eventSource.close(); 
+                } catch(e) {
+                    console.error('Error closing EventSource:', e);
+                }
+                eventSource = null;
+            }
+            if (reconnectTimer) {
+                clearTimeout(reconnectTimer);
+                reconnectTimer = null;
             }
         }
         
-        loadDevices();
+        function scheduleReconnect() {
+            if (reconnectTimer) return;
+            console.log(`Reconnecting in ${reconnectDelay}ms...`);
+            reconnectTimer = setTimeout(() => {
+                reconnectTimer = null;
+                connectSSE();
+                // Backoff bis 10s
+                reconnectDelay = Math.min(reconnectDelay * 2, 10000);
+            }, reconnectDelay);
+        }
+        
+        function connectSSE() {
+            cleanupSSE();
+            
+            const REALTIME_URL = (window.RUNTIME_CONFIG && window.RUNTIME_CONFIG.REALTIME_URL)
+                ? window.RUNTIME_CONFIG.REALTIME_URL
+                : api('/realtime');
+            
+            console.log('Connecting to SSE:', REALTIME_URL);
+            
+            try {
+                // Verwende Polyfill wenn verfügbar, sonst native EventSource
+                const EventSourceImpl = window.EventSourcePolyfill || window.EventSource;
+                eventSource = new EventSourceImpl(REALTIME_URL, { 
+                    withCredentials: false 
+                });
+                
+                eventSource.onopen = function() {
+                    console.log('SSE connected successfully');
+                    reconnectDelay = 2500; // Reset backoff
+                    document.getElementById('connection-status').textContent = 'Verbunden';
+                    document.getElementById('connection-status').className = 'status connected';
+                };
+                
+                eventSource.onmessage = function(evt) {
+                    if (!evt || !evt.data) return;
+                    
+                    // Heartbeats beginnen mit ":" -> ignorieren
+                    if (typeof evt.data === "string" && evt.data.charAt(0) === ":") {
+                        return;
+                    }
+                    
+                    try {
+                        const data = JSON.parse(evt.data);
+                        if (window.handleSSE) {
+                            window.handleSSE(data);
+                        }
+                    } catch (e) {
+                        console.error('Error parsing SSE message:', e);
+                    }
+                };
+                
+                eventSource.onerror = function(error) {
+                    console.error('SSE error:', error, 'readyState:', eventSource?.readyState);
+                    document.getElementById('connection-status').textContent = 'Getrennt';
+                    document.getElementById('connection-status').className = 'status disconnected';
+                    
+                    // Safari/iOS verliert Netz beim App-Switch: ruhig reconnecten
+                    scheduleReconnect();
+                };
+                
+            } catch (error) {
+                console.error('Failed to create EventSource:', error);
+                document.getElementById('connection-status').textContent = 'Getrennt';
+                document.getElementById('connection-status').className = 'status disconnected';
+                scheduleReconnect();
+            }
+        }
+        
+        // Visibility-Change Handler für iOS App-Switch
+        document.addEventListener('visibilitychange', function() {
+            if (!document.hidden) {
+                // Wenn wieder sichtbar & keine offene Verbindung: verbinden
+                if (!eventSource || eventSource.readyState !== 1) {
+                    console.log('Page visible again, reconnecting SSE...');
+                    connectSSE();
+                }
+            }
+        });
+        
+        // Start SSE connection
+        connectSSE();
+        
+        // Load initial device states
+        async function loadDevices() {
+            try {
+                const response = await fetch(api('/devices/states'));
+                const states = await response.json();
+                console.log('Loaded initial device states:', states);
+                
+                // Update UI with initial states
+                for (const [deviceId, state] of Object.entries(states)) {
+                    if (state.power !== undefined) {
+                        // It's a light
+                        currentState[deviceId] = state.power;
+                        updateDeviceUI(deviceId, state.power, state.brightness);
+                    } else if (state.mode !== undefined || state.target !== undefined) {
+                        // It's a thermostat
+                        if (state.mode) thermostatModes[deviceId] = state.mode;
+                        if (state.target) thermostatTargets[deviceId] = state.target;
+                        updateThermostatUI(deviceId, state.current, state.target, state.mode);
+                    }
+                }
+            } catch (error) {
+                console.error('Failed to load initial device states:', error);
+            }
+        }
+        
+        // Load initial states before connecting SSE
+        loadDevices().then(() => {
+            console.log('Initial states loaded, now connecting SSE...');
+        });
     </script>
 </body>
 </html>

config/devices.yaml

@@ -16,7 +16,7 @@ devices:
   - device_id: test_lampe_1
     type: light
     cap_version: "light@1.2.0"
-    technology: zigbee2mqtt
+    technology: simulator
     features:
       power: true
       brightness: true
@@ -26,7 +26,7 @@ devices:
   - device_id: test_lampe_2
     type: light
     cap_version: "light@1.2.0"
-    technology: zigbee2mqtt
+    technology: simulator
     features:
       power: true
     topics:
@@ -35,7 +35,7 @@ devices:
   - device_id: test_lampe_3
     type: light
     cap_version: "light@1.2.0"
-    technology: zigbee2mqtt
+    technology: simulator
     features:
       power: true
       brightness: true
@@ -45,12 +45,22 @@ devices:
   - device_id: test_thermo_1
     type: thermostat
     cap_version: "thermostat@2.0.0"
-    technology: zigbee2mqtt
+    technology: simulator
     features:
-      mode: true
+      mode: false
       target: true
       current: true
       battery: true
     topics:
       set: "vendor/test_thermo_1/set"
       state: "vendor/test_thermo_1/state"
+  - device_id: experiment_light_1
+    type: light
+    cap_version: "light@1.2.0"
+    technology: zigbee2mqtt
+    features:
+      power: true
+      brightness: true
+    topics:
+      set: "zigbee2mqtt/0xf0d1b80000195038/set"
+      state: "zigbee2mqtt/0xf0d1b80000195038"

config/layout.yaml

@@ -24,6 +24,12 @@ rooms:
         icon: "🛏️"
         rank: 10
       
+  - name: Lab
+    devices:
+      - device_id: experiment_light_1
+        title: Experimentierlampe
+        icon: "💡"
+        rank: 10