MQTT Client 1.4 Misc 4.1 Community

Submitted by user goatchurchprime; MIT; 2026-09-09

A small MQTT 3.1.1 (the simple and lightweight MQTT protocol popular with IoT) client written entirely in GDScript. Supports TCP, TLS, WebSocket and secure WebSocket connections, retained messages, last wills, text and binary payloads, and QoS 0/1 publishing.

Now with demonstrations and deterministic tests.