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**To create a stream for delivering one or more large files in chunks over MQTT** The following ``create-stream`` example creates a stream for delivering one or more large files in chunks over MQTT. A stream transports data bytes in chunks or blocks packaged as MQTT messages from a source like S3. You can have one or more files associated with a stream. :: aws iot create-stream \ --cli-input-json file://create-stream.json Contents of ``create-stream.json``:: { "streamId": "stream12345", "description": "This stream is used for Amazon FreeRTOS OTA Update 12345.", "files": [ { "fileId": 123, "s3Location": { "bucket":"codesign-ota-bucket", "key":"48c67f3c-63bb-4f92-a98a-4ee0fbc2bef6" } } ] "roleArn": "arn:aws:iam:123456789012:role/service-role/my_ota_stream_role" } Output:: { "streamId": "stream12345", "streamArn": "arn:aws:iot:us-west-2:123456789012:stream/stream12345", "description": "This stream is used for Amazon FreeRTOS OTA Update 12345.", "streamVersion": "1" } For more information, see `CreateStream <https://docs.aws.amazon.com/iot/latest/apireference/API_CreateStream.html>`__ in the *AWS IoT API Reference*.