I just unboxed my shiny new rb5009UG+S+IN. It’s been awhile since I used Mikrotik, but I seem to remember USB being visible under /port or /system/routerboard/usb. I can bounce the power, but I can’t see the port. Does the USB port have to be turned on somewhere?
[admin@MikroTik] /port> print
It should be enabled out of the box and will show up under System/Disks when mounted.
So that USB port can’t be used for anything other than storage? Like a GPS?
I have plugged in an external drive, and it does show up.
Yes it can and people have.
What am I missing? I have the GPS module installed, a GPS connected to USB, but the port doesn’t show up in ports or GPS.
Things get visible in /port only after device is inserted and appropriate serial driver is loaded. USB storage obviously won’t show in /port (but rather in /disk). If you happen to plug in an USB device for which driver is missing from ROS, then device will still be enumerated under /system/resources/usb as this doesn’t depend on running correct driver for it … and vice-versa, listing device in this section does not assure it can properly work in ROS.
Is there a doc on how to load the driver? It’s a u-blox GPS.
In case you did not yet find these.
http://forum.mikrotik.com/t/gps-usb/55792/1
So your product is NMEA-output support compliant ? Perhaps some fiddling with the baudrate ?
Offcourse all of this is RouterOS 6.x (old wiki)
Sounds like the USB device-id isn’t being recognized as a serial device. e.g. it would show up in /port/print if it was reconqnized. And if there isn’t /port for it, the GPS package isn’t going to help.
Check /system/resource/usb/print, and see if it shows up on the USB bus. If it does, I’d open a ticket with Mikrotik with a supout.rif for the device with it attached. If USB device-id isn’t known to RouterOS, there is no user available method to add it.
You might also want to update RouterOS to latest stable. And also firmware too (/system/routerboard/update). If you haven’t already…
I had a U-Blox 8 based GPS working on USB until 7.13.1, but then I both updated the RB5009, and messed around with the GPS at the same time (reset it to factory defaults) and it stopped registering as a port. I assumed it was something with 7.13.2 and 7.14 as it seems that people are having a lot of issues with third party LTE modems that are also registering as USB device, so currently I hoping for the next ROS update to fix, and if that does not work out, I will probably have to figure something out myself 
I really appreciate all the responses. This thing is speaking NMEA GPS at 9600 baud. Should be easily detected. I’m going to open a bug and attach a support.rtf after the holidays.
Andrew
Same problem with SONOFF Zigbee 3.0 USB Dongle Plus V2
It is visible under system/resource/usb but not visible in the port.