From 035429400d995c74262bc6a4e7ba28f3eb0fa858 Mon Sep 17 00:00:00 2001 From: Michel Date: Sun, 29 Oct 2023 16:54:28 +0100 Subject: [PATCH] New tip: ttyUSB0 not present when using CH340 --- readme.md | 1 + ttyusb-not-present-when-using-ch340.md | 32 ++++++++++++++++++++++++++ 2 files changed, 33 insertions(+) create mode 100644 ttyusb-not-present-when-using-ch340.md diff --git a/readme.md b/readme.md index 0809a8a..1a62810 100644 --- a/readme.md +++ b/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) diff --git a/ttyusb-not-present-when-using-ch340.md b/ttyusb-not-present-when-using-ch340.md new file mode 100644 index 0000000..1a99c00 --- /dev/null +++ b/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)