# FTDI usb to serial invisible

**URL:** <https://forum.arduino.cc/t/ftdi-usb-to-serial-invisible/611572>\
**Category:** 3rd Party Boards\
**Created:** [September 19, 2019, 5:10pm UTC](https://forum.arduino.cc/t/ftdi-usb-to-serial-invisible/611572 "2019-09-19T17:10:46Z")\
**Posts on this page:** 1\
**Showing post:** 7

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**Author:** ![max777](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/max777/32/1126479_2.png) [@max777](https://forum.arduino.cc/u/max777)\
**Post date:** [September 26, 2019, 12:36am UTC](https://forum.arduino.cc/t/ftdi-usb-to-serial-invisible/611572/7 "2019-09-26T00:36:35Z")

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> pert:  
> Does the problem still occur if you disconnect the FTDI from the Pro Mini and then only connect the FTDI module to your computer?  
> [/quote
> 
> when pro mini is not connected, the computer see nothing

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