IoT Core

💡 Definition

AWS IoT Core is a managed cloud service that lets connected devices interact with cloud applications and other devices easily and securely.

🔑 Key Concepts

• Device Gateway: Allows devices to communicate with AWS. Supports MQTT, HTTP, WebSockets.
• Message Broker: Securely transmits messages to and from all your IoT devices.
• Device Shadow: A JSON document representing the state of a device (e.g., Light=On). Apps can read/write to the shadow even if the device is offline.
• Rules Engine: Routes data from devices to AWS services (e.g., save to S3, trigger Lambda).

⚙️ How it Works

1. Connect: Devices connect to IoT Core using certificates.
2. Publish: Devices publish messages (e.g., temperature data).
3. Act: Rules engine processes the message and sends it to DynamoDB, Kinesis, etc.

🎯 Use Cases

• Smart Home: Controlling lights, locks, thermostats.
• Industrial IoT: Monitoring factory machinery.
• Fleet Management: Tracking vehicles.

💰 Pricing Model

• Connectivity: Charged per minute of connection.
• Messaging: Charged per million messages.

📝 Exam Tips (CLF-C02)

• "Connects devices to the cloud".
• "MQTT" protocol.
• Device Shadows (store state for offline devices).

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See Also: * IoT Greengrass