# FTDI USB Serial Device - where is ttyUSB0? **URL:** \ **Category:** mangOH Green\ **Created:** [June 1, 2016, 7:53pm UTC](https://mangoh.discourse.group/t/ftdi-usb-serial-device-where-is-ttyusb0/92 "2016-06-01T19:53:50Z")\ **Posts on this page:** 1\ **Showing post:** 4
**Author:** ![awneil](https://sea2.discourse-cdn.com/flex016/user_avatar/mangoh.discourse.group/awneil/32/486_2.png) [@awneil](https://mangoh.discourse.group/u/awneil)\ **Post date:** [June 2, 2016, 6:21am UTC](https://mangoh.discourse.group/t/ftdi-usb-serial-device-where-is-ttyusb0/92/4 "2016-06-02T06:21:12Z")
The same unit as here: > [@Firmware Update: Customer Config OK; Carrier Fails](http://mangoh.discourse.group/t/firmware-update-customer-config-ok-carrier-fails/80): > > Continuing from earlier thread, as the forum won’t let me post any more in that thread - and suggests starting a new one: Replies to questions from asyal: what version of mangoh are you using rev7 or rev8? Your module sku looks pretty old. Can you do app status? Yes, it’s quite old - one of the ones given out at the Sierra Wireless Developer Summit in Paris last year. How would I check the mangOH Rev? Or “app status”? Can you download FW again and carrier again? This time with boot pi… --- _[View the full topic](https://mangoh.discourse.group/t/ftdi-usb-serial-device-where-is-ttyusb0/92)._