Supercharge Your ESP32: Build an Affordable MQTT Broker

[@HighVoltages]

ESP32 MQTT broker using PicoMQTT: ruclips.net/video/scOqgQTHKho/видео.html

[@HJ-ou1fy]

Thanks for the information.
What I couldn't find out is whether this broker also supports the “LastWill” topic

[@HighVoltages]

No, I do not think it supports "Last will" topic. It is a very simple mqtt broker.