Connecting your device to AWS IoT - FreeRTOS

Connecting your device to AWS IoT

Your device must be registered with AWS IoT to communicate with the AWS Cloud. To register your board with AWS IoT, you need the following:

An AWS IoT policy

The AWS IoT policy grants your device permissions to access AWS IoT resources. It is stored in the AWS Cloud.

An AWS IoT thing

An AWS IoT thing allows you to manage your devices in AWS IoT. It is stored in the AWS Cloud.

A private key and X.509 certificate

The private key and certificate allow your device to authenticate with AWS IoT.

Follow these procedures to create a policy, thing, and key and certificate.

To create an AWS IoT policy

  1. Browse to the AWS IoT console.

  2. In the navigation pane, choose Secure, choose Policies, and then choose Create.

  3. Enter a name to identify your policy.

  4. In the Add statements section, choose Advanced mode. Copy and paste the following JSON into the policy editor window:

    { "Version": "2012-10-17", "Statement": [ { "Effect": "Allow", "Action": "iot:*", "Resource": "*" } ] }

    This policy grants all AWS IoT resources access to all AWS IoT actions. This policy is convenient for development and testing purposes, but it is not recommended for production.

  5. Choose Create.

To create an IoT thing, private key, and certificate for your device

  1. Browse to the AWS IoT console.

  2. In the navigation pane, choose Manage, and then choose Things.

  3. If you do not have any things registered in your account, the You don't have any things yet page is displayed. If you see this page, choose Register a thing. Otherwise, choose Create.

  4. On the Creating AWS IoT things page, choose Create a single thing.

  5. On the Add your device to the thing registry page, enter a name for your thing, and then choose Next.

  6. On the Add a certificate for your thing page, under One-click certificate creation, choose Create certificate.

  7. Download your private key and certificate by choosing the Download links for each.

  8. Choose Activate to activate your certificate. Certificates must be activated prior to use.

  9. Choose Attach a policy to attach a policy to your certificate that grants your device access to AWS IoT operations.

  10. Choose the policy you just created, and then choose Register thing.

After you obtain your certificates and keys from the AWS IoT console, you need to configure the freertos/tests/include/aws_clientcredential.h header file so your device can connect to AWS IoT.

To configure freertos/tests/include/aws_clientcredential.h

  1. Browse to the AWS IoT console.

  2. In the navigation pane, choose Settings.

    Your AWS IoT endpoint is displayed in Device data endpoint. It should look like Make a note of this endpoint.

  3. In the navigation pane, choose Manage, and then choose Things.

    Your device should have an AWS IoT thing name. Make a note of this name.

  4. On the computer where you build the FreeRTOS source code, open the freertos/test/include/aws_clientcredential.h file in your IDE and specify values for the following constants:

    • static const char clientcredentialMQTT_BROKER_ENDPOINT[] = "Your AWS IoT endpoint";

    • #define clientcredentialIOT_THING_NAME "The AWS IoT thing name of your board"