akenad 
This is not an issue, 

This is a very great thanks to @nicoduj for his reactivity. It's a very good Job.
Now we can use Logitech Harmony Hub with websockets, with all releases of firmware :

https://forum.jeedom.com/viewtopic.php?f=142&t=41528&p=677221#p677221
https://community.jeedom.com/t/2440

akenad :) 