You tested device to the AWS IoT core communication in the previous task. In this task, you do the opposite.
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Goto MQTT client which is already running, click on the Subscribe tab, enter iot/dojooutbound as the topic and click on the Subscribe button. This is a topic which the device is subscribing to. AWS IoT core will send message to this topic and the device will recieve it.
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The device now waiting for the message. Please keep it running like that.
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Go back to AWS IoT subscriptions page, click on the Publish to a topic link.
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On the next screen, enter the topic as iot/dojooutbound and change the message to be sent. Click on the Publish a topic button.
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Go back to MQTT device and you can see the message recieved from the AWS IoT core.
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With both way communication, the workshop is over. Kindly goto the next task to clean-up the resources for the workshop.