@jahonix:
Which HP thin client is that? Some have an internal PCI slot you could use to plug in a WLAN card with a supported chipset.
Way better that fiddling around with USB WLAN on FreeBSD…
HP t5720. It has internal PCI but for installing of PCI card I need to make holes in case and leave it without of cover. Also I need to isolate a PCI card from USB connectors (PCI card cannot be installed easy, only with little curve, and it's not good for PCB).
For it I have modified loader.conf.local: debug.acpi.disabled="thermal" , I wrote it on forum here. Without of it I had flood of ACPI errors.
So… Solution is quite easy. :) I have compared what pfSense added to wlan0 interface when I assign it to WAN. Just ... <wireless>. I have added it to config file in rsu0 section - and voila! I have wireless settings for rsu0 and can use it.
<if>rsu0</if>
<blockbogons>....
<wireless>....</wireless></blockbogons>
PS: using of new firmware for rsu and adding of```
legal.realtek.license_ack=1
rsu-rtl8712fw_load="YES"
PS2: For this client with high bandwidth you may have APIC errors. In this case disable APIC in device.hints.

</wireless>