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Azure-Samples/MqttApplicationSamples: Samples implementing common PubSub patterns for Edge and Cloud Brokers

page_type languages name description products

sample

csharp

python

TypeScript

rust

MQTT Application Samples

Guidance to build Pub/Sub applications targeting MQTT Brokers.

azure

azure-event-grid

These samples provide guidance to build Pub/Sub applications targeting MQTT Brokers in different programming languages. The samples are provided in these programming languages:

C#
C
Go
Python
TypeScript
Rust

The instructions are provided for the following MQTT Brokers:

Azure Event Grid Namespaces
Mosquitto for local development

Note: These samples can also be leveraged for any MQTT Broker that supports X509 certificates authentication

You can test the samples locally on your machine or in Github Codespaces:
- To test in Github Codespaces:
  - Click on the Code button on the top right of the page
  - select the Codespaces tab, then click + to create a new codespace
- To test locally on your machine:
  - Use a Linux environment as the samples are optimized to run in Linux.
    - To install and run Linux on Windows, run wsl --install -d Ubuntu. After installation is complete, you can run wsl to start running commands on your Ubuntu subsystem whenever you open a new terminal window. Learn more
    - Note: To run in native Windows, you must adapt the scripts to use Windows paths.
  - Clone this repository to any directory in your Linux environment: git clone https://github.com/Azure-Samples/MqttApplicationSamples.git
Follow the instructions in the Setup to setup your environment.
Navigate to each of the scenario folders and follow its README.md instructions to run the scenario.
- To configure the MQTT connection, the samples use .env files, with variables to specify the host name, port, certificates, etc. The .env files must be located in the scenario folder, e.g. scenarios/getting_started, and can be reused across samples/languages, including the client certificates.

Language specific instructions

Each language requires developer tools, such as compilers and SDKs to build and run the samples:

dotnet
C
Go
Python (TBD)
TypeScript
Rust (TBD)

These samples implement PubSub patterns used in MQTT Applications.

Each scenario involves a different number of producers and consumers. These producers and consumers are loosely coupled actors that interact with the MQTT broker using a specific topic structure and known message payloads.

Each scenario requires the following configurations:

Configure Authentication: mTLS certificates and clients.
Configure Authorization: Define which client(s) can interact with which topic(s).

Follow the instructions in the Prerequisites to configure these scenarios.

Scenario Description dotnet C python go TypeScript Rust Getting Started This quick start scenario simulates basic MQTT tasks. ✓ ✓ ✓ ✓ ✓ ✓ JWT Authentication This is a quick start scenario that authenticates to Azure Event Grid using Json Web Tokens (JWT) ✓ soon soon soon soon soon Telemetry This scenario simulates multiple clients (the producers) sending data to a different set of topics to be consumed by a single application (the consumer). ✓ ✓ ✓ soon ✓ soon Command This scenario simulates the request-response messaging pattern using MQTT v5. ✓ ✓ soon soon ✓ soon Alert This scenario simulates a fan-out use case where multiple clients receive a singlemessage from the same topic. ✓ soon soon soon soon soon

Note

soon: in progress and will be added soon

This project may contain trademarks or logos for projects, products, or services. Authorized use of Microsoft trademarks or logos is subject to and must follow Microsoft's Trademark & Brand Guidelines. Use of Microsoft trademarks or logos in modified versions of this project must not cause confusion or imply Microsoft sponsorship. Any use of third-party trademarks or logos are subject to those third-party's policies.

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