{
    "api": "Altal Heat Pump API",
    "version": "2.4",
    "status": "online",
    "endpoints": {
        "GET \/": "API info",
        "POST \/data": "Receive data from ESP32",
        "GET \/device\/{id}": "Get device data",
        "GET \/history\/{id}": "Get device history",
        "GET \/devices": "List all devices",
        "GET \/commands?device_id={id}": "Get commands for ESP32 (NEW)",
        "POST \/send_command": "Send command from smartphone to device (NEW)"
    }
}