What are RFID reader company supporting AWS IOT core and how to connect with AWS IOT core to exchange message.Is message structure fixed to exchange message using mqtt

Many modern RFID readers can be integrated into AWS IoT Core through intermediary software or gateways that translate RFID data into a format compatible with AWS IoT Core. The process may involve using MQTT or HTTPS protocols for communication. See below to get started

1. https://aws.amazon.com/blogs/industries/enhancing-retail-store-inventory-management-through-rfid-technology-aws/
2. https://aws.amazon.com/solutions/guidance/RFID-store-inventory-on-aws/