Firmware Settings 到 OTA

sequenceDiagram
participant UI
participant F as Firmware
participant A as Wi-Fi Access
participant H as HTTP
participant O as OTA
UI->>F: check
F->>A: metadata lease
F->>H: release metadata
UI->>F: install
F->>A: OTA exclusive
F->>H: image
F->>F: verify
F->>O: write inactive + boot