Configure subscriptions - Amazon IoT Greengrass
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End of support notice: On October 7th, 2026, Amazon will discontinue support for Amazon IoT Greengrass Version 1. After October 7th, 2026, you will no longer be able to access the Amazon IoT Greengrass V1 resources. For more information, please visit Migrate from Amazon IoT Greengrass Version 1.

Configure subscriptions

In this step, you create a subscription that enables the GG_TrafficLight shadow to send updated state information to the GG_Car_Aggregator Lambda function. This subscription is added to the subscriptions that you created in Module 5, which are all required for this module.

  1. On the group configuration page, choose the Subscriptions tab, and then choose Add.

  2. On the Create a subscription page, do the following:

    1. For Source type, choose Service, and then choose Local Shadow Service.

    2. For Target type, choose Lambda function, and then choose GG_Car_Aggregator.

    3. For Topic filter, enter $aws/things/GG_TrafficLight/shadow/update/documents

    4. Choose Create subscription.

    This module requires the new subscription and the subscriptions that you created in Module 5.

  3. Make sure that the Greengrass daemon is running, as described in Deploy cloud configurations to a core device.

  4. On the group configuration page, choose Deploy.