New tip: ttyUSB0 not present when using CH340

readme.md

@@ -12,3 +12,4 @@ My collection of readme files for Debian based desktop opperating systems.
 ## Tips
 
 * [Type characters with accents like in Windows](type-characters-with-accents-like-in-windows.md)
+* [ttyUSB0 not present when using CH340](ttyusb-not-present-when-using-ch340.md)

ttyusb-not-present-when-using-ch340.md

@@ -0,0 +1,32 @@
+# ttyUSB0 not present when using CH340
+
+First encountered when using an Arduino Uno with Linux Mint 21.2 Cinnamon. The Arduino Uno used has a CH340 USB to serial converter.
+
+According to some information found on [Ask Ubuntu](https://askubuntu.com/questions/1403705/dev-ttyusb0-not-present-in-ubuntu-22-04) there seems to be a braille device with this chip and Linix seems to give it to brltty.
+
+*Note: this tip was tested on a Dutch version of Linux Mint. Keep this in mind for other derivatives of Debian and some translation errors by me.*
+
+## Steps
+
+* Open a terminal window
+* Execute the following command to see if Linux can actually see the device
+
+  ```sh
+  lsusb
+  ```
+
+* Check the output ans see if a CH340 is present, see example below
+
+  ```sh
+  Bus 003 Device 005: ID 1a86:7523 QinHeng Electronics CH340 serial converter
+  ```
+
+* If the device indead is present, and you don´t use any braille device, execute the following
+
+  ```sh
+  sudo apt-get autoremove --purge -y brltty
+  ```
+
+## Source
+
+* [Ask Ubuntu](https://askubuntu.com/questions/1403705/dev-ttyusb0-not-present-in-ubuntu-22-04)