schema_version: 1
diagram_type: architecture
meta:
  title: Technical context
  output: technical-context.html
decisions: [mqtt-with-mutual-tls]
components:
  - ref: homeowner
    pos: [40, 60]
    size: [130, 60]
  - ref: ops-engineer
    pos: [40, 160]
    size: [130, 60]
  - ref: installer
    pos: [40, 260]
    size: [130, 60]
  - ref: telemetry-platform
    pos: [280, 160]
    size: [150, 60]
  - ref: heat-pump
    pos: [540, 60]
    size: [130, 60]
  - ref: push-service
    pos: [540, 160]
    size: [130, 60]
  - ref: service-desk
    pos: [540, 260]
    size: [130, 60]
connections:
  - { from: homeowner, to: telemetry-platform, label: HTTPS }
  - { from: ops-engineer, to: telemetry-platform, label: HTTPS, variant: security }
  - { from: installer, to: telemetry-platform, label: HTTPS }
  - { from: heat-pump, to: telemetry-platform, label: MQTT 8883, variant: emphasis, decisions: [mqtt-with-mutual-tls] }
  - { from: telemetry-platform, to: push-service, label: HTTP/2 }
  - { from: telemetry-platform, to: service-desk, label: webhook }
cards:
  - dot: cyan
    title: 3 Domain interfaces
    items:
      - "Heat pump: in telemetry and fault codes; out none"
      - "Homeowner: in app requests; out status, history, alerts"
      - "Ops engineer: in queries; out fleet dashboards"
      - "Installer: in device serial; out device certificate"
      - "Push service: out alert notifications"
      - "Service desk: out tickets for faults needing a visit"