This article explains how to improve IoT device discoverability in AWS IoT Core by leveraging thing type attributes and fleet indexing to access up to 50 device attributes.

• AWS IoT Core limits searchable attributes to 3 per thing, restricting device discovery capabilities
• Thing types enable attaching 47 additional non-searchable attributes to things
• Fleet indexing allows searching and querying non-searchable attributes despite their classification
• Combined approach provides access to 50 total attributes for comprehensive device discovery
• Fleet indexing enables complex queries across device registry, shadows, connectivity, and violations
• Use case: Lighting-as-a-Service providers can query devices by model, wattage, color, firmware version
• Fleet indexing is metered by index updates and search queries; intended for administrative use only

By combining thing types with fleet indexing, administrators can efficiently organize, search, and troubleshoot large IoT device fleets using comprehensive attribute combinations.