mqtt-5
There are 3 repositories under mqtt-5 topic.
flespi-software/MQTT-Board
Diagnostic-oriented MQTT client tool. Supports MQTT 5.0 and 3.1.X protocols, connections to multiple brokers, MQTT operations logs and multiple subscribe widgets with unique/history topic filtering mode. Saves configuration in browser's local cache.
eerimoq/mqttools
MQTT version 5.0 client and broker using asyncio
Omniaevo/mqtt5-explorer
MQTT5 Explorer is a simple yet feature-rich client to visualize data of any MQTT broker.