CH340 dev ttyUSB not showing Linux, but detected in terminal

Let’s fix this Error

Let’s fix this error by editing the configuration file “brltty-device.rules” of BRLTTY which is in “/usr/lib/udev/rules.d/”.

Each linux distro may have a different number, in this article my linux distro has a prefix of 85 which is “85-brltty.rules”.

Now, open a terminal and use the following command:

sudo gedit /usr/lib/udev/rules.d/85-brltty.rules 

Look for the row that has the id 1A86:7523 as shown in the following image:

# Device: 1A86:7523
# Baum [NLS eReader Zoomax (20 cells)]
ENV{PRODUCT}=="1a86/7523/*", ENV{BRLTTY_BRAILLE_DRIVER}="bm", GOTO="brltty_usb_run"

Then, comment (#) before ENV{PRODUCT}==”1a86/7523/*”, ENV{BRLTTY_BRAILLE_DRIVER}=”bm”, GOTO=”brltty_usb_run” , so it becomes like this:

# Device: 1A86:7523
# Baum [NLS eReader Zoomax (20 cells)]
# ENV{PRODUCT}=="1a86/7523/*", ENV{BRLTTY_BRAILLE_DRIVER}="bm", GOTO="brltty_usb_run"

The save the file.

The next is to find the system running brltty-udev.service. Please use this command:

systemctl list-units | grep brltty

And stop that service using this commands:

systemctl mask brltty-udev.service
systemctl stop brltty-udev.service

Replug Device

After that, replug the device. look at in the software. ttyUSB0 will appear. If it doesn’t appear, please logout/reboot your linux operating system.

Done. Hopefully this CH340 dev ttyUSB not showing, but detected in the terminal article is useful.

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