netplan on ubunty 20.04 (also on a rpi4)

[R C]

Hello,


I am installing Ubuntu 20.04 on a raspberry pi 4 and want to use an 
external antenna (log range / directed  wifi). The access point it must 
connect to does not require a password.


I don't know if netplan is the best way to set it up


I am using "Ubuntu server" and  want to do it on the commandline/cli, is 
there a write-up for how to do that?

(also, the accesspoint doesn't use a password (authentication is done 
differently))


thanks,


Ron