Does MQTT support MQTT 5.0 and MQTT 3.1.1

[yplwrt]

Answers checklist.

• I have read the documentation ESP-AT Programming Guide and the issue is not addressed there.
• I have used the latest released firmware or have updated my ESP-AT branch (master or release) to the latest version and checked that the issue is present there.
• I have searched the issue tracker for a similar issue and not found a similar issue.

General issue report

Does MQTT support MQTT 5.0 and MQTT 3.1.1

[ustccw]

hi @yplwrt , the default firmware supports MQTT 3.1.1. If you want to support MQTT 5.0, you can enable it in menuconfig.

python build.py menuconfig > Component config > ESP-MQTT Configurations > Enable MQTT protocol 5.0