On rpd-console image, networks are managed by NetworkManager which relies on dhclient by default.
NetworkManager detects when your interface is ready and runs dhclient.
The following command adds a WiFi connection to my Access Point:
$ nmcli dev wifi connect "CISCO" password "MYPASSWORD"
An IP is retrieved automatically after link establishment.
Now if you want to make it static you can modify your connection:
$ nmcli con mod "CISCO" ipv4.method manual ipv4.address 192.168.1.42/16 ipv4.dns 126.96.36.199,188.8.131.52 ipv4.gateway 192.168.1.1
You can see all your connections with:
$ nmcli con show
you can also directly edit NetworkManager configuration files in /etc/NetworkManager/system-connections/