Hi @tosch and thank you for your reply.
I copy the file /opt/omd/versions/2.0.0p17.cre/lib/python3/cmk/base/plugins/agent_based/cisco_wlc.py to ~sitename/local/share/check_mk/agents/plugins and change it.
I add the two lines you mentioned in your pull request.
Nothing new.
I restart my site (omd stop, omd start).
Nothing new.
May I ask you if I made something wrong ?
Thanks a lot.
Have a nice day,
Jean-Emmanuel