I have a portable Allstar Node (43943) which I recently needed to setup on Wifi.
I thought adding a display would come in handy and it did.
Now I can configure the node locally instead of having to log in remotely.
I did need to add this in    /boot/config.txt    file for it to work.
# uncomment if you get no picture on HDMI for a default “safe” mode
# uncomment this if your display has a black border of unused pixels visible
# and your display can output without overscan
# uncomment the following to adjust overscan. Use positive numbers if console
# goes off screen, and negative if there is too much border
# uncomment to force a console size. By default it will be display’s size minus
# overscan.
# uncomment if hdmi display is not detected and composite is being output
# uncomment to force a specific HDMI mode (here we are forcing 800×480!)
hdmi_cvt=800 480 60 6 0 0 0
# uncomment to force a HDMI mode rather than DVI. This can make audio work in
# DMT (computer monitor) modes
# uncomment to increase signal to HDMI, if you have interference, blanking, or
# no display
# uncomment for composite PAL
#uncomment to overclock the arm. 700 MHz is the default.
# for more options see http://elinux.org/RPi_config.txt
I put this line of code in the /boot/config.txt file prior to setting up my node. 
(On another Pi I had at home)
I then configured my node using the new version 1.5 code from Hamvoip.com
In turn I was able to configure my Freedom Pop Wifi hotspot locally with the
keyboard and monitor attached.
Note, I had initially setup this node on my wired network at home, and figured I could just later setup
the wifi, but I was having trouble getting the wifi configured for some reason.  With the monitor hooked up
to this portable node, I had no trouble setting up wifi and can use it to connect to other wifi networks when
I travel with this node as the Freedom Pop isn’t as reliable as I wish it was.
Image is from the Adafruit site