GL-X750 Spitz + EP06-A | Cannot select /dev/ttyUSB2

Technical Support for Routers
1

Hi All,

I have a GL-X750 Spitz where I’m trying to get working with Visible/Verizon. I was initially having issues getting it to connect but finally got it to connect with /dev/ttyUSB2, albeit at low speeds. So I started tinkering around, and now I can no longer go back to /dev/ttyUSB2. I get a “device busy” error when attempting to select it. /dev/ttyUSB3 works, but it’s dreadfully slow. ttyUSB3 is even much slower than ttyUSB2. I searched for answers on how to get back to /dev/ttyUSB2, but came up empty handed.

I can still send AT commands just fine to /dev/ttyUSB2. I just can’t select it. Thanks for any help in advance.

Cheers,
Kermee

2

ttyUSB2 is generally used for AT command and ttyUSB3 is used for data.

It is possible to use ttyUSB2 as data and ttyUSB3 as AT command but I think this is not the default config. Seems some program locked the port.

Maybe just power cycle the device or modem?