Calling AWS services from your application code

You can use the AWS SDK for Python (Boto) to call AWS services from your application code. For example, if your model detects something out of the ordinary, you could post metrics to Amazon CloudWatch, send an notification with Amazon SNS, save an image to Amazon S3, or invoke a Lambda function for further processing. Most AWS services have a public API that you can use with the AWS SDK.

The appliance does not have permission to access any AWS services by default. To grant it permission, create a role for the application, and assign it to the application instance during deployment.

Using Amazon S3

You can use Amazon S3 to store processing results and other application data.

import boto3
s3_client=boto3.client("s3")
s3_clients3.upload_file(data_file,
                    s3_bucket_name,
                    os.path.basename(data_file))

Using the AWS IoT MQTT topic

You can use the SDK for Python (Boto3) to send messages to an MQTT topic in AWS IoT. In the following example, the application posts to a topic named after the appliance's thing name, which you can find in AWS IoT console.

import boto3
iot_client=boto3.client('iot-data')
topic = "panorama/panorama_my-appliance_Thing_a01e373b"
iot_client.publish(topic=topic, payload="my message")

Choose a name that indicates the device ID or other identifier of your choice. To publish messages, the application needs permission to call iot:Publish.

To monitor an MQTT queue

1. Open the AWS IoT console Test page.

2. For Subscription topic, enter the name of the topic. For example, panorama/panorama_my-appliance_Thing_a01e373b.

3. Choose Subscribe to topic.