The latest articles on DEV Community by Fabrício Bracht (@fabracht). https://dev.to/fabracht https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F3887763%2Ff5aee36f-6836-4f2d-81f3-25d35b716d99.jpg https://dev.to/fabracht en Fabrício Bracht Tue, 21 Apr 2026 03:12:55 +0000 https://dev.to/fabracht/laboverwire-mqtt-tool-4fm https://dev.to/fabracht/laboverwire-mqtt-tool-4fm <p>Hello everyone. This is my very first post here. I wanted to share something I've been building the good part of a year now. I built an MQTT diagram editor/simulator.</p> <p> <iframe src="https://www.youtube.com/embed/-E4U_mCvEbs"> </iframe> </p> <p>You draw on a visual canvas by dragging brokers, clients, topic lists, and bridges to the canvas. In simulation, messages actually flow, latency and packet loss are configurable, and the validator flags bridge loops and unreachable topics before you run anything.<br> If you want, you can set an external broker address, like <code>broker.laboverwire.com/mqtt</code>, or one you've set it up on <code>localhost</code>. The same diagram generates Rust and Typescript client code, broker configs, and AsyncAPI specs.<br> All free.</p> <p><a href="https://laboverwire.com/features" rel="noopener noreferrer">https://laboverwire.com/features</a></p> iot showdev systemdesign tooling