Portal for public SaaS MQTT labs based on MIMIC MQTT Simulator for Amazon AWS IoT Core .

You can try yourself for free (no registration/credit card required) the other MQTT labs , then upgrade to this paid lab if you like it. AWS Tutorial

AWS Tutorial


This MIMIC MQTT lab demonstrates integration of Amazon AWS IoT Core and MIMIC MQTT Simulator to produce an out-of-the-box lab for immediate first-time setup and use of dynamically controllable device shadows. By having a quick, successful example, you will short-circuit integration of your own devices into AWS IoT.

Check out this 2-minute Youtube video of simulated devices updating their device shadows in AWS IoT in real-time.

This lab sets up within 5 minutes a realistic MQTT-based sensor publishing JSON telemetry that fits the AWS IoT device shadow guidelines. There is no limit to the scalability, but we'll show 1 sensor setup automatically using the AWS API, and then you can try the same yourself on any number in the lab for your requirements (if you need more sensors, send e-mail to sales@gambitcomm.com.


Features of this lab include:


These are the tutorial steps you are going to perform to get going quickly:

  1. Setup
  2. Add Device(s)
  3. Start Device(s)
  4. Investigate
  5. Change Telemetry
  6. Stop Device(s)
  7. Optional
  8. Cleanup

The power of MIMIC is not limited to this. If you have a scenario you need simulated, send e-mail to sales@gambitcomm.com.

Step 1: Setup


Setup a temporary user in AWS for this lab. This guarantees that any outside access only goes through this temporary user. Later, when you remove the user, all further access will be denied.

This procedure is shown in this 3-minute Youtube video. You can follow along step-by-step by just pausing the video as needed.


To setup your lab, we recommend 2 web browser windows side by side. For example in the left browser window you can have your MIMIC MQTT lab for AWS, and in the right your AWS console, eg. as in Figure 1:

2 browser windows

Figure 1 - 2 browser windows side-by-side

You can maximize either of them when working in one window for a while.

In the right browser window, in your AWS dashboard, just navigate to your IAM Dashboard ie. pull down the top left Services and select IAM. It should then say Identity and Access Management (IAM) in the top left, as shown in Figure 2:

AWS IAM console

Figure 2 - AWS IAM console

First, you are going to create a temporary user for this tutorial. Everything in this tutorial will be done with that user, so once you are done, you can remove that user and you are sure no further access can occur. NOTE: this is the most complicated part of the tutorial, because we cannot automate it for you, and it shows you what is involved with AWS for when you have to do everything yourself.

  1. Click on Users on the left menu, then Add User, the Add user Set user details page appears.

  2. The User name does not matter, we recommend AWS_tutorial_user.

  3. For Access type pick Programmatic access.

  4. Then click on Next: Permissions at the bottom, and the Set permissions page appears.

  5. Pick Add user to group, then click on Create group.

  6. In the Create group dialog, the Group name does not matter, we recommend AWS_tutorial_group.

  7. For Filter Policies type iot and it will find the IoT-related policies. NOTE: click carefully here. Click the checkbox in front of AWSIoTConfigAccess which will allow the tutorial to configure things in your AWS account. Make sure the checkmark appears before the name.

  8. Then click Create group at the bottom.

  9. It should go back to the Add User Set permissions page, and the new AWS_tutorial_group should be selected. Click Next: Tags at the bottom.

  10. The Add User Add tags (optional) page appears. We don't need any tags, so just click Next: Review at the bottom.

  11. The Add User Review page appears, and when satisfied, click Create user at the bottom.

  12. A new Add User page appears with a green check mark and Success. NOTE: this is important, because it is the only place to get the Access key ID and Secret access key for your new AWS user.

  13. Copy/paste the access key and click on Show under Secret access key and copy/paste it away for later (eg. into a text file, or a Word document). These are the only 2 pieces of information from your account to complete the AWS tutorial setup.

  14. Click Close and you are done with configuring your account for the tutorial.

In order to link this new temporary user between your AWS IoT and this lab, you will use the Step 1: Setup... menu item under the AWS Tutorial top menu.

  1. Click on AWS Tutorial. then Step 1: Setup.... This will from now on be referred to as AWS Tutorial -> Step 1: Setup.... The Step 1: Setup dialog appears.

  2. Copy/paste the access key ID and secret access key from above into each the respective fields in the dialog, then press OK.

  3. Once you click OK, a new Run Script Console tab is opened in the browser with the output of the processing. When it says Task completed, and there are no ERROR messages, your lab is configured to work with your AWS account.


The temporary user is setup and you are ready to use the MIMIC MQTT Lab to add a device, investigate how it connects, and play with it.

Step 2: Add Device(s)


The left MIMIC MQTT lab browser window shows red icons, one for each simulated device. This is the equivalent of your real-world devices sitting on your lab bench. They are not doing anything.

We need to configure one of the devices to publish telemetry to AWS IoT Core. This task configures AWS IoT to allow access by the device, and configures the devices to use the access keys provided by AWS IoT.


  • Click on AWS Tutorial -> Step 2: Add Device.... The Step 2: Add Device dialog appears.

    Step 2: Add Device dialog

    Figure 3 - Step 2: Add Device dialog

    Type the Prefix for the thingName of the thing to be created in your AWS account. We recommend to keep mimic, that way you can find it easily later. The first thingName will be mimic-1.

    Once you click OK, a new Run Script Console tab is opened in the browser with the output of the processing. When it says Task completed, and there are no ERROR messages, your new sensor device is added to your AWS account and integrated with the MIMIC MQTT Lab. You can dismiss this tab, or switch back to the lab browser tab titled Amazon AWS IoT Lab.

    If it does not have it already, when you now reload the MIMIC MQTT Lab window, the first icon should have a name underneath its number, eg. the first device will be named mimic-1. It is red because it is currently stopped. This is the equivalent of the device sitting on your lab bench in the real world with power switched off.

    Also, in your AWS IoT Console, under the Manage menu click Things and you will see the newly created thing:

    Step 2: Thing in AWS IoT

    Figure 4 - Step 2: Thing in AWS IoT


    We did the following in AWS IoT:

    1. created a thing with thingName mimic-1;

    2. created a certificate for the thing to access AWS IoT over SSL;

    3. created a policy AWS_tutorial_policy to allow IoT operations;

    4. linked the three

    You can click on the thing in your AWS IoT Console and investigate its settings. You are now ready to experiment with this thing in the next sections.

    Using the lab

    To start using the lab, first verify that at least one MIMIC thing is showing in your AWS IoT Console as shown in Figure 4 above.

    Step 3: Start Device(s)


    The devices in your lab are stopped, equivalent to lab equipment sitting on your lab bench and powered off. So they are not doing anything. We need to power up the recently configured device, the one that is labelled mimic-1.


    To start it, select the icon(s) of the device(s) you want to start. Each selected device will have a blue indicator in the upper left. Then click on AWS Tutorial -> Step 3: Start Device(s) -> Go!.

    The selected icon(s) will turn green, as if you had turned power on.

    Just like the equipment on your lab bench, whether it delivers telemetry to AWS IoT or not depends on whether you have configured the correct parameters in the MQTT client software.

    In this lab, if you added the device as in the section above and there were no errors, then it will publish telemetry once a second. You will know that it works when a orange arrow appears in the icon, indicating activity.

    In your AWS Iot Console, you can click on the thing that you started, then go to its Shadow, and telemetry will be updating. In particular, we made it so that the light value changes frequently at random, like a flickering light.


    The icon of the selected device shows green to indicate that it is started, and telemetry is published to AWS IoT. Now you can investigate further how things work, and change telemetry on the fly.

    Step 4: Investigate


    Now that it is running, you'll want to see how the lab device and your AWS IoT Thing are linked. That way you can reproduce this with your real devices.


    To check the configuration of the device in your AWS IoT Console, click on the Thing, and then click Security on the left. It shows the certificate for SSL communications, when you click on it, it shows the AWS_tutorial_policy policy attached to it. Those determine how your device can interact with AWS IoT Core.

    To check the configuration of the simulated device in MIMIC, select the device icon in the lab, then click on AWS Tutorial -> Step 4: Investigate -> MQTT Configuration...

    Step 4: MQTT Configuration

    Figure 5 - Step 4: MQTT Configuration

    The important configuration parameters for the device are the

    1. Config File - this defines the MIMIC simulation: what MQTT payload to send where and when. Here we publish once a second the telemetry to the device shadow with a JSON message containing:

          "state" : {
              "reported" : {
      		"color" : COLOR,
      		 "power" : "on",
      		 "mem": MEMORY,
      		 "light": LIGHT,
      		 "temp": TEMP

      The LIGHT value changes at random for this tutorial. The MEMORY value increments sequentially. The COLOR and TEMP values can be dynamically controlled, eg. in the Step 5: Change Telemetry section below.

    2. Broker - your AWS IoT::Data endpoint

      Port - 8883 for secure MQTT communications

    3. ClientID - set to the thingName

    4. TLS Config - uses the certificates assigned to the thing by AWS IoT

    These are the configurables you would have to setup in your real-world device to communicate with AWS IoT.

    NOTE: The OK button is disabled in this lab. More advanced labs allow you to configure anything on the simulated devices.

    You can investigate the TLS certificates with Step 4: Investigate -> TLS Configuration...


    We verified the necessary configuration for a device to communicate with AWS Iot Core.

    Step 5: Change Telemetry


    You are seeing real-time, dynamic telemetry in your device shadow on AWS IoT. The temp value is static, while the light value changes at random, like a flickering light. In this task we will interactively change the temperature to some other predictable value. This lets you change the temperature on-demand, eg. a device over-heating. Imagine the effort to do this with a real device.


    If you have not done so already above, in the MIMIC lab window select the icon(s) of the device(s) you want to manipulate. Each selected device will have a blue indicator in the upper left. Then click on AWS Tutorial -> Step 5: Change Telemetry....

    In the Step 5: Change Telemetry dialog, change the Temperature value to something else, eg. 150000. As soon as you click OK, the new temperature value is published.

    Step 5: Change Telemetry

    Figure 6 - Step 5: Change Telemetry

    In your AWS Iot Console, you can click on the thing that you started, then go to its Shadow, and the new temp telemetry will be reflected.


    We changed temperature telemetry on the fly, on-demand, predictably. You can use this technique when it comes to testing your application for certain conditions.

    Step 6: Stop Device(s)


    Your lab devices are continuously generating telemetry and publishing messages to AWS IoT Core. This task stops them, the equivalent of powering down the real equipment.


    In the MIMIC lab window select the icon(s) of the device(s) you want to stop. Each selected device will have a blue indicator in the upper left. Then click on AWS Tutorial -> Step 6: Stop Device(s).

    The icon(s) will turn red, and messages cease to be published.


    We stopped the devices to stop publishing messages.

    Step 7: Optional Tasks

    These are further optional tasks you can do in your lab:

    1. you can repeatedly do Step 2: Add Device , and it will add more things with incrementing instance number upto the total allowed in your lab. Once you start the lab devices, you will see independent telemetry for each;

    2. you can edit a thing to add it to a thing group to manage collections of your things;

    3. you can add a thing type and apply it to your thing in order to constrain and categorize it;



    Once a lab is setup, you want to clean it up when you are done, to be certain no left-over devices have access to your account. This procedure makes certain there are no left-overs.


    The AWS Tutorial -> Step 8: Cleanup... lets you cleanup devices setup in the lab. Just select the device(s), then that menu item cleans up any associated resources from both AWS IoT and the MIMIC MQTT Lab.

    Once you have deleted a device, you can add one back in with different credentials with the Add step above.

    To clear the rest, as detailed for Q: What about security / privacy? in the next section, ie.:

    1. remove the AWS_tutorial_policy in your AWS IoT Console under Secure and Policies.

    2. remove the AWS_tutorial_user in your AWS IAM Dashboard that you used in the Setup step above. Once you do this, you no further operations will work in this lab until you setup again with a new temporary user.

    Frequently Asked Questions

    • Q: What will this cost me?

      A: Besides the fixed cost for the MIMIC MQTT lab, there will be minor AWS IoT costs in your Amazon account that we cannot control, most likely less than $1. Well worth the savings in effort in seeing a third-party device publish to the AWS IoT device shadow in under 5 minutes.

    • Q: What exactly does this do to my AWS account?

      A: You setup a temporary user AWS_tutorial_user and group AWS_tutorial_group in the above Setup.

      If you run the Step 1 - Add dialog with your AWS authentication parameters it will setup exactly 1 device instance with an associated certificate that links to the AWS_tutorial_policy policy. Any subsequent device additions create a new certificate and thing that link to that policy.

    • Q: What about security / privacy?

      A: The lab will be able to access your account during the session because access tokens are stored in the lab configuration. You can delete the temporary user AWS_tutorial_user that you created in the Setup section above. Then you can verify that the devices can no longer talk to your account. This is verifiable cleanup, ie. you have proven that the outside device cannot access any more.

  • Video: MQTT Lab Intro

    Video: MQTT Lab AWS Setup

    Video: Device shadows in AWS

    Video: Real-time Control System with Amazon Greengrass

    Video: Bosch sensors

    Video: IBM MessageSight

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