wolfMQTT is wolfSSL’s lightweight MQTT client and broker library, purpose-built for embedded and IoT devices. It is small, portable, and pairs directly with the wolfSSL embedded TLS library for secure MQTT over TLS 1.3. The wolfMQTT 2.2.0 release takes keep-alive scheduling off the application’s plate, replays unacknowledged QoS 1 and QoS 2 messages after a […]
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The wolfMQTT Broker: Persistence, Encryption at Rest, and a Round of Hardening
For ten years, wolfMQTT operated purely as a client library. With v2.0.0, we introduced its counterpart: a lightweight MQTT broker built on the same codebase, maintaining our strict footprint requirements and TLS stack. Over the last two releases, we’ve added core features needed to survive process restarts, along with fixes for edge cases that surface […]
Read MoreMore TagWhat We’ve Been Building: A wolfMQTT Update
Since the wolfMQTT 2.1.0 release back in July, the team has been busy working on some major upgrades. Whether you’re running a client or a broker, there’s a lot to dig into in the current master branch on GitHub. We’ve focused on smoothing out the developer experience, tightening up protocol compliance, and, most importantly, a […]
Read MoreMore TagwolfMQTT 2.1.0 Released: Broker Session Persistence, Stronger Security, and MQTT v5 Reliability
wolfMQTT is wolfSSL’s lightweight MQTT client and broker library, purpose-built for embedded and IoT devices. It is small, portable, and pairs directly with the wolfSSL embedded TLS library for secure MQTT over TLS 1.3, giving resource-constrained devices a fully authenticated, encrypted messaging stack in a tiny footprint. The wolfMQTT 2.1.0 release extends the built-in broker […]
Read MoreMore TagOTA Demonstrator with wolfBoot, wolfTPM and wolfMQTT
Our new demonstrator is available on GitHub. This demonstrator showcases a secure over-the-air (OTA) firmware update workflow using wolfSSL components and a software TPM. It integrates: wolfBoot for secure boot loader wolfTPM for root of trust wolfMQTT for update delivery wolfSSL / wolfCrypt for secure communication and verification The demo runs on Linux and can […]
Read MoreMore TagWebSocket Support Comes to the wolfMQTT Broker
wolfMQTT clients have been able to speak MQTT over WebSocket for a while. Now the broker can too. Starting with the latest code on master, the wolfMQTT broker accepts WebSocket connections alongside standard TCP – no proxy, no bridge, no extra infrastructure. Pass -w to open a WebSocket listener: ./src/broker -p 1883 -w 9001 This […]
Read MoreMore TagwolfMQTT Embedded Broker: Lightweight MQTT for the Edge
MQTT is the standard protocol for IoT messaging, but existing brokers are server-class software. They assume abundant memory, a full OS, and dynamic memory allocation. Embedded devices, gateways, and safety-critical platforms don’t have those luxuries. Teams building edge gateways, local message routing, or offline-capable IoT systems have had to work around this gap. Getting started […]
Read MoreMore TagAnnouncing wolfMQTT v2.0.0: A Lightweight Built-In MQTT Broker
We are excited to announce the release of wolfMQTT v2.0.0, a major milestone that introduces a brand-new lightweight MQTT broker as its headline feature. This release represents a significant evolution of the wolfMQTT library, expanding it from a client-only library into a complete MQTT solution for embedded systems, IoT gateways, and edge computing applications. Lightweight […]
Read MoreMore TagAnnouncing wolfMQTT v1.21.0: NetX and ThreadX RTOS Support
We are excited to announce the release of wolfMQTT v1.21.0, which introduces support for NetX and ThreadX RTOS platforms as its headline feature. This release continues our commitment to providing a lightweight, secure, and feature-rich MQTT client implementation for embedded systems and IoT applications. What’s New in v1.21.0 The wolfMQTT v1.21.0 release includes several significant […]
Read MoreMore TagwolfMQTT: Using wolfCrypts implementation of ML-KEM and ML-DSA
A long time ago, we added support for Kyber and Falcon in wolfMQTT. That support used an integration into liboqs for the Kyber and Falcon implementation. Things have changed since then! Kyber is no longer Kyber, it is now ML-KEM. Falcon will soon become FN-DSA, but since then rock solid standards for ML-DSA have been […]
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