The problem is that there are, for instance, serial ports over USB (provided by USB-RS232 adapters), and those are listed under /dev/ttyUSB*. And reading the Serial-HOWTO at Linux.org, I get the idea that there'll be other name spaces as well, as time comes. So I need to find the official way to detect serial devices.

2011年3月18日 · You will then be able to select /dev/ttyUSB0 or other ttyUSB device with a terminal emulator such as minicom or gtkterm. Note that you may need to still do the following as indicated above: add your user to the dialout group; change the permissions on the /dev/ttyUSB0 device; To check if the user is in the dialout group:

This will loop through a list of files with filename ttyUSB*, including symlinks, in /sys/bus/usb/devices. Within the results we will search for a file named modalias and look for a string containing the vendor id "v" "19d2" and product id "p" 0016.

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I should have googled it. At which point I would have discovered this is the "Braille Display" thing. So apparently, default out of the box sets up some braille driver stuff which likes to gobble up the /dev/ttyUSB* before other things. I removed it and all is well now. I did end up making the modprobe lines more specific (including vendor and ...

2020年7月17日 · ls /dev/ttyUSB* To list out the USB-serial ports that are active. lsusb To get more information about the USB buses and connected devices. Is there a way to relate these two results (or an alternative) to figure out what I need?

2016年9月2日 · ttyS0 is the device for the first UART serial port on x86 and x86_64 architectures. If you have a PC motherboard with serial ports you'd be using a ttySn to attach a modem or a serial console.

2020年7月16日 · They look like /dev/ttyUSBx devices, where x is a number starting from 0. Client devices are often rebooted or go offline or are unplugged or new ones are added. This causes ttyUSB device numbering to change constantly because each new client takes lowest unused number. Can I somehow set client devices to have constant numbers?

2015年5月4日 · When working with ttyUSB, it is necessary to adjust the speed of the converter to the one with which the device is working behind the USB <-> UART converter. For example, to view information that comes from the device behind …

2017年3月4日 · My problem is that every time I unplug/plug the device again, or when I reboot my PC, the device gets a new ttyUSB number, for example: ttyUSB0 or ttyUSB1. How can I force this device to always use the same number (say: ttyUSB0)?