Yes . i use mqtt with WifiClientSecure
but before i use mqtt i have to read this address which has SSL/TLS
address : https://assess.mmaviot.com/gadget/skeleton?serial=swr012108031138&uid=95f916e0-56d6-487f-82dd-da75b14081cb
after reading this address i connect to mqtt
SSL certificate must be received in handshake mode