Overview

The goals of this project is as follows:

• Understand the overhead involved with streaming multimedia (MM) data from IoT sensors
• Understand how AWS IoT Core handles MM streaming
• Gain a deeper understanding of Terraform

Setup

• Install Terraform
• Sign up for AWS, navigate to Security Credentials and create an access key
• Create a .env and add the following

  AWS_ACCESS_KEY_ID=<access-key-id>
  AWS_SECRET_ACCESS_KEY=<secret-access-key>

• Replace tf/s3.tf#3 with your own bucket name
• Initialize Terraform

  terraform init

• make setup

Deploy

terraform apply --auto-approve

Test

1. Setup

Reference deploy

2. Run subscriber script

ruby client.rb subscribe <subscriber-count> <log-id>

Example:

ruby client.rb subscribe 100 100_big_2

3. Publish messsage

Run publish script

ruby client.rb publish <file-path> <log-id>

Example:

ruby client.rb publish fixtures/big_2.jpg 100_big_2

Note:

• Reference the files in /fixtures
• Ensure that the log_id used here is the same as the log_id used in the step 2

4. Run statistics script

 ruby statistics_calculator.rb <log-id>

Example:

ruby statistics_calculator.rb 100_big_2

Note:

• Ensure that the log_id used here is the same as the log_id used in the step 2

5. Teardown

Empty Bucket

aws s3api delete-object --bucket $bucket --key <key-to-delete>

Destroy resources

terraform destroy --auto-approve

For good measure, ensure that resources in terraform.tfstate is an empty list.

Others: Interfacing w/ AWS CLI

List Object Keys

bucket=<your-bucket-name>
aws s3api list-objects --bucket $bucket | jq -r '.Contents[].Key'

Identify the latest object based on the key name.

Retrieve message (object) from bucket

aws s3api get-object --bucket $bucket --key <key-from-previous-step> example.png

Publish message

aws iot-data publish \
  --topic "iot-core-topic" \
  --cli-binary-format raw-in-base64-out \
  --payload fileb://example.png \
  --region "us-east-1"