diagrams and simulation

diagrams/plantuml/ota-architecture.puml

@@ -0,0 +1,38 @@
+@startuml
+title OTA roles and device boundary
+left to right direction
+skinparam shadowing false
+skinparam monochrome true
+skinparam packageStyle rectangle
+
+package "Release and deployment services" {
+  component "Build, test and publish" as release
+  component "Artifact storage" as artifacts
+  component "Deployment management" as deployment
+}
+
+package "Device" {
+  component "OTA manager" as manager
+  component "Installer" as installer
+  component "Boot control" as boot
+  component "Local health checks" as checks
+  database "Persistent update progress\nand pending reports" as progress
+}
+
+release --> artifacts : publish artifact and\nverification information
+release --> deployment : register release and compatibility
+manager --> deployment
+manager --> installer : authorize preparation
+installer --> artifacts : download and verify
+manager --> boot : request trial through\nplatform interface
+checks --> boot : confirm after local checks pass\nor request recovery after failure
+manager --> progress : save / resume progress;\nqueue reports while offline
+manager --> checks : arrange checks after activation
+
+legend bottom
+  OTA manager -> deployment management: request releases; report running version and outcome.
+  Boot control runs before the OTA manager and handles exhausted trial attempts.
+  Hangs need a covered reset path. Checks and recovery do not require the server.
+  Roles may be combined in one tool. This view uses a system update with trial boot.
+endlegend
+@enduml