MQTTnet 5.1.0.1559

MQTTnet is a high performance .NET library for MQTT based communication. It provides a MQTT client and a MQTT server (broker) and supports v3.1.0, v3.1.1 and v5.0.0 of the MQTT protocol.

No packages depend on MQTTnet.

* Core: Used new language features across the entire library * Core: Performance improvements * Core: Added validations for variable byte integers which do not match the .NET uint perfectly * Client: Added support for pre-encoded UTF-8 binary buffers for user properties (#2228, thanks to @koepalex) * Server: Improved performance of retained messages when no event handler is attached (#2093, thanks to @zhaowgit) * Server: The event `InterceptingClientEnqueue` is now also called for retained messages (BREAKING CHANGE!) * Server: The local end point is now also exposed in the channel adapter (#2179) * Marked all projects as AOT compatible * Restored the strong name of the nugets * Embedded license file in all nugets (#2197, thanks to @JensNordenbro) * Added support for dotnet10

.NET 8.0

  • No dependencies.

.NET 10.0

  • No dependencies.

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5.1.0.1559 4 2026/4/9
5.0.1.1416 3 2025/8/1
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5.0.0.1214-RC 3 2026/4/9
4.3.7.1207 5 2025/8/1
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