Enter J2L dev arena
The hostname of the server hosting the arena, i.e. an URL such as 'mqtt.jusdeliens.com', or an IP address like '192.168.1.10'
The port number of the server hosting the arena, i.e. an integer such as 8080
The name of your robot displayed in the arena. Either one you wish to take as pseudo, or the one the administrator gave you
Your profile password to log in the server. Ask your administrator if you don't have it
The case sensitive name of the arena to join