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Table of contents
1.
Introduction
2.
Definition
2.1.
Benefits
3.
How to get started with AWS IoT Events
4.
Create an input
4.1.
1). Create an input in the Navigation Pane
4.2.
2). Create an input in the Detector Model
5.
Send inputs to test the detector model.
6.
Monitoring with alarms
7.
Security in AWS IoT Events
8.
Tagging your AWS IoT Events resources
8.1.
Tag basics
8.2.
Tag restrictions and limitations
9.
Frequently Asked Questions
9.1.
What is a MQTT meaasge?
9.2.
How are tags effective in AWS IoT Events?
10.
Conclusion
Last Updated: Mar 27, 2024
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AWS IoT Events

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Introduction

If you have hasn't heard about the term AWS IoT Events or have listened to it but do not have a clear understanding. At the end of this article, it will be apparent what an AWS IoT Event is and how to get started with the AWS IoT console and perform different functions.

Let's first move to "What are AWS IoT Events?"

 

Definition

With AWS IoT Events, you can easily monitor your equipment or device fleets for failures or changes in operation and trigger the actions when such events occur. AWS IoT Events has a duty of continuously watching IoT sensor data from devices, applications, processes, and other AWS services(mentioned in the AWS Services) to identify significant events so you can take action.

Benefits

  • Use of Simple Logical Expressions to Recognize Complex Patterns of Events
    • Complex patterns can recognize events that involve multiple inputs from a single IoT device and many independent sensors. This is useful because each sensor and application provides essential information.
  • Accept Inputs from Multiple Sources
    • It accepts inputs from many IoT telemetry data sources. These include sensor devices and other AWS IoT services, such as AWS IoT Core and AWS IoT Analytics.
  • Automatically Scale to Meet the Demands of Your Fleet
    • It will help you to scale your demands automatically. You can define a detector only once for a specific type of device. This service will automatically scale and manage all instances of that device that connect to AWS IoT Events.
  • Trigger Actions Based on Events
    • It helps you to directly trigger actions in Amazon Simple Notification Service (Amazon SNS), Lambda, AWS IoT Core, Amazon Kinesis Firehose, and Amazon SQS.
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How to get started with AWS IoT Events

This particular heading will deal with how to create an input and a detector model using "AWS IoT Events Console." Two states of an engine in the model: 

  • a normal state
  • over-pressure condition

 

Whenever the measured pressure in the engine exceeds a certain threshold(the lowest point or level), the detector model transitions from the normal state to the over-pressure state, then it sends an Amazon Simple Notification Service(Amazon SNS) message to alert a technician about the condition of the process. When the pressure in the engine again drops below the threshold for three consecutive pressure readings you need to check, the model returns to the normal state and sends another SNS message as a confirmation(feedback).

We will check for three consecutive readings below the pressure threshold to eliminate possible stuttering of over-pressure/standard messages in case of a nonlinear recovery phase or an anomalous pressure reading.

You can also see several pre-made detector model templates on the console. The console can also be used to import detector models that others have written(already made) or export your models and use them in different AWS Regions.

 

Use the AWS IoT Events console to learn about the following.

  • Define inputs
  • Create a detector model
  • Monitor a device or process
  • To send messages as inputs to your detector model

Create an input

The gathering of files is recommended when you construct the inputs for your models that contain sample messages that your devices or processes will send to report their health status. Having these files will help you organize the inputs that are required.

There are multiple methods to create an input described in this section/topic.

To get started, first create a file named "input.json" on your local file system location with the following contents shown below:

{

  "motorid": "Fulton-A32",

  "sensorData": {

    "pressure": 24,

    "temperature": 50

  }

}

 

Now that you have this starter "input.json file," you can create an input. Use one of the topics in this section, whichever is suitable for you, and see the instructions about creating an input by using the detector model or navigation pane.

 

1). Create an input in the Navigation Pane

  • Log in to the AWS IoT Events console or select the option to create a new AWS IoT Events account.
  • Next is to select and then expand the navigation pane in the upper left corner of the AWS IoT Events Console.
  • On the left of the navigation pane, select Inputs.
  • In the right corner of the Amazon console, choose to Create input.
  • Enter an InputName you want to mention, an optional Description(about the file), and choose Upload file for the input. Select the "input.json" file created for input in the dialog box that displays.

 

Choose input attributes, select the features to use, and choose to Create. In this example, we choose motorid and sensorData.pressure.

2). Create an input in the Detector Model

This is the second method that shows how to define an input for a detector model to receive telemetry data or messages.

  1. Open the AWS IoT Events console.
  2. Choose " Create detector model " in the AWS IoT Events console window, and choose "Create detector model."
  3. Choose to Create new.
  4. Choose to Create input.
  5. Enter an InputName of your choice, an optional Description, and choose Upload file for the input. In the dialog box that displays a file you created in the overview for creating an input --select the "input.json."
  6. Choose input attributes, select the features to use, and choose to Create. We have chosen "motorid" and "sensorData.pressure" in this example.

 

Send inputs to test the detector model.

This subheading shows you how to create an AWS IoT rule in the AWS IoT console window that forwards messages as inputs to your AWS IoT Events detector model. AWS IoT console's MQTT client is used to send text messages. Also, you can use this method to get telemetry data into AWS IoT Events when your devices can send MQTT messages(It is a particular format of a packet or message) using the AWS IoT message broker.

Follow the procedure below to send inputs to test the detector model.

  • First, open the AWS IoT core console window. In the navigation pane, choose Act.
  • On the Rules page, choose "Create."
  • Now on the Create a rule page, enter a Name and Description you want to put in.
  • The important step is to enter the following query in the Rule query statement. 
SELECT *, topic(2) as motorid FROM 'motors/+/status'
  • After this, in "Set" one or more actions, choose to Add action.
  • On the action page, select Send a message to an AWS IoT Events Input and choose "Configure action."

On the Configure action page, do the following procedure:

  • For the Input name, enter the name you created in the previous section.
  • For Role, choose to Create Role, and in the Create a new role window, enter a Name and select "Create Role." This will create a role with permission to forward messages to AWS IoT Events.
  • Back on the Configure action page, choose to Add action.
  • On the Create a rule page, choose to Create rule.
  • On the Rules page, in the navigation pane, choose Test.
  • On the MQTT client page, choose to Publish a topic.
  • In the "Publish section" of the page, enter the topic, enter the message payload in the editor, and choose Publish.
  • For Publishing, keep the topic the same, but change the "pressure" in the payload to a value greater than the threshold value specified in the detector model.
  • Choose Publish.

 

The detector instance that you have created generates and sends you an SNS message. To see the detector in operation, continue to send messages with pressure readings above or below the pressure threshold (70 for this example).

Monitoring with alarms

AWS IoT Events provides you with alarms that help you monitor your data for any changes. Mainly you can create alarms that send notifications when a threshold is breached. The data to be monitored can be metrics that you measure for your equipment and processes. Alarms help you detect streamlined maintenance and issues and optimize the performance of your equipment and processes.

Alarms are instances of alarm models. The alarm model specifies what to detect, who gets notified, when to send notifications, etc. You can also determine one or more supported actions when the alarm state changes. AWS IoT Events routes input attributes or features derived from your data to the appropriate alarms. If the data you're monitoring is outside the cited range, the alarm is invoked. You can also set them to sleep mode or acknowledge the alarms.

When creating an alarm model, you choose whether to enable acknowledge flow. Your team gets notified when the alarm state changes if you enable acknowledge flow. Your team has the authority to acknowledge the alarm and leave a note. For example, you can include information about the alarm and your actions to address the issue. If the data you're monitoring is outside the specified range, the alarm is invoked.

 

Alarms have the following states:

  • DISABLED
  • NORMAL
  • ACTIVE
  • ACKNOWLEDGED
  • LATCHED
  • SNOOZE_DISABLED

 

Security in AWS IoT Events

As an AWS customer, you benefit from a data center and network architecture built to meet the requirements of the most security-sensitive organizations. 

Security is the highest priority shared responsibility between AWS and the customer. The shared responsibility model describes this as security in the cloud and security of the cloud:

  • Security in the cloud – Your responsibility is determined by the AWS service. You are also responsible for other factors, including your organization's requirements, the sensitivity of your data, and applicable laws and regulations.
  • Security of the cloud – After discussing your responsibility, the next is to discuss the duties of the AWS. It is responsible for protecting the infrastructure that runs AWS services in the AWS Cloud. Yout security is how effective it is regularly tested and verified by third-party auditors as part of the AWS compliance programs(You can see AWS services about these programs).
  • AWS also provides you with some services that you can use securely.

Tagging your AWS IoT Events resources

You need to assign your metadata to help you manage and organize your detector models, inputs, and resources in the form of tags.

Tag basics

Why use tags? Use tags to manage and organize your AWS IoT Events such as jobs, groups, resources, and things in different ways, for example, by the environment, owner, or purpose. Tags are helpful when you have many resources or groups of the same type.

Each tag consists of a key and an optional value, which you define. You can edit tag keys and values or remove tags from a resource. For example, you could define a set of tags for your inputs in the model that helps you track the devices that send these inputs by their type. Or you can set the value of the tags to an empty string. It is recommended to use a consistent set of tag keys to make it easier to manage your resources.

 

You can search for and filter resources based on the tags you add or apply, use tags to identify and track your costs and control your resource access.

Tag restrictions and limitations

The following basic restrictions apply to tags are:

  • The maximum key length is 127 Unicode characters in UTF-8.
  • The maximum number of tags per resource should be 50.
  • The maximum value length is 255 Unicode characters in UTF-8.
  • You can't modify or delete tag names or values with the "aws" prefix because it's reserved only for AWS use. 
  • Tag keys and values are case-sensitive.
  • Allowed characters in UTF-8 are spaces, letters, numbers, and some special characters: - + =. _:/@. There can be restrictions on these allowed characters on other services and resources.

Check out this article - Components Of IOT

Frequently Asked Questions

What is a MQTT meaasge?

The MQTT packet or message format consists of a 2-byte fixed header (always present) + Variable-header (not always present)+ payload (not always present). 

How are tags effective in AWS IoT Events?

Tags are used to manage and organize your AWS IoT Events such as jobs, groups, resources, and things in different ways, for example, by the environment, owner, or purpose. Tags are helpful when you have many resources or groups of the same type.

 

Conclusion

AWS IoT Events, you can easily monitor your equipment or device fleets for failures or changes in operation and trigger the actions when such events occur. In this article, we have covered some important usage of the AWS IoT Events console.

Click here to read out these amazing articles AWS Certified and AWS interview questions.

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