Dual-Core FreeRTOS Mimarisi

Task Yapısı

┌──────────────────────────────────────────────────┐
│  ESP32 Dual-Core (FreeRTOS)                      │
├────────────────────────┬─────────────────────────┤
│  CORE 0 (PRO_CPU)     │  CORE 1 (APP_CPU)       │
│                        │                          │
│  Network Task          │  Modbus Task             │
│  Priority: NORMAL      │  Priority: HIGH          │
│  Stack: 12KB           │  Stack: 6KB              │
│  • WiFi Driver         │  • RS485 Polling         │
│  • MQTT Client         │  • Register Parsing      │
│  • BLE Provisioning    │  • Template Mapping      │
│  • OTA Handler         │  • Raw Mode              │
│  • Telemetry TX        │  • Backpressure Control  │
│  • Command RX          │                          │
│                        │  App Task                │
│                        │  Priority: LOW           │
│                        │  Stack: 3KB              │
│                        │  • Button Handler        │
│                        │  • LED Controller        │
│                        │  • State Machine         │
│                        │  • Watchdog Feed         │
└────────────────────────┴─────────────────────────┘

Toplam stack: 21KB / ~320KB kullanılabilir

Inter-Task İletişim

FreeRTOS Queue'lar

Kuyruk	Kapasite	Item Boyutu	Yön
TelemetryQueue	15	1KB	Modbus → Network
CommandQueue	10	—	Network → Modbus
StatusQueue	5	—	Modbus → App

Event Group Bayrakları (16 flag)

• TASK_EVT_WIFI_CONNECTED / DISCONNECTED
• TASK_EVT_MQTT_CONNECTED / DISCONNECTED
• TASK_EVT_DEVICE_CLAIMED / UNCLAIMED
• TASK_EVT_OTA_STARTED / COMPLETED
• TASK_EVT_SYSTEM_READY

Mutex'ler

Mutex	Koruma	Timeout
UART	RS485 erişimi	1000ms
NVS	Flash storage	500ms
Config	Yapılandırma verisi	—

Durum Makinesi

BOOT → BOOTSTRAP → CLAIMED → OPERATIONAL
                       ↕
                  OTA_UPDATE
                       ↕
                     ERROR
                       ↕
                 FACTORY_RESET

LED Göstergeleri

LED	Renk	Durum
LED 1	Yeşil	WiFi bağlantısı (sabit=bağlı, yanıp sönen=bağlanıyor)
LED 2	Mavi	MQTT bağlantısı + ownership durumu
LED 3	Kırmızı	Hata / unclaimed
LED 4	Turuncu	OTA güncelleme (yanıp sönen)

Konfigürasyon Sabitleri

#define TELEMETRY_QUEUE_SIZE        15
#define TELEMETRY_ITEM_MAX_SIZE     1024    // 1KB per JSON
#define COMMAND_QUEUE_SIZE          10
#define NETWORK_TASK_STACK_SIZE     (12 * 1024)
#define MODBUS_TASK_STACK_SIZE      (6 * 1024)
#define APP_TASK_STACK_SIZE         (3 * 1024)
#define WATCHDOG_TIMEOUT_SEC        30
#define WATCHDOG_FEED_INTERVAL_MS   15000
#define MQTT_BROKER_KEEPALIVE       60