Device connectivity in AWS IoT Core: Monitor, diagnose, and act at scale

This article explains AWS IoT Core's connectivity management capabilities for monitoring and controlling IoT device connections at scale.

• Fleet Indexing enables fleet-wide connectivity search, aggregation, dynamic grouping, and metrics on connected/disconnected devices
• GetThingConnectivityData API provides near real-time per-device connectivity status without building custom infrastructure
• GetConnection API offers real-time broker session introspection for any client ID, with 30-minute post-disconnect retention
• ListSubscriptions API audits active topic subscriptions per client to diagnose message delivery failures
• DeleteConnection API programmatically disconnects misbehaving devices, forcing re-authentication against updated policies
• Lifecycle Events publish MQTT messages on connect/disconnect for event-driven automation and real-time notifications
• CloudWatch Logs with dedicated log groups provide historical audit trails, including new Ping and Connection.AuthNError event types
• Fleet Metrics emit aggregated connectivity statistics to CloudWatch for dashboards, alerting, and trend analysis

These composable capabilities eliminate the need for custom connectivity tracking infrastructure while enabling proactive operations, compliance auditing, and automated remediation across IoT fleets.