插上usb 轉 uart

dmesg看到
[84136.712589] CE: hpet increasing min_delta_ns to 22500 nsec
[91398.532049] usb 6-1: new full speed USB device using uhci_hcd and address 2
[91398.701179] usb 6-1: configuration #1 chosen from 1 choice
[91399.156665] usbcore: registered new interface driver usbserial
[91399.156772] USB Serial support registered for generic
[91399.156851] usbcore: registered new interface driver usbserial_generic
[91399.156853] usbserial: USB Serial Driver core
[91399.172370] USB Serial support registered for ch341-uart
[91399.172403] ch341 6-1:1.0: ch341-uart converter detected
[91399.186071] usb 6-1: ch341-uart converter now attached to ttyUSB0
[91399.186108] usbcore: registered new interface driver ch341

diff /dev設備的差異
81a82
> serial
161a163
> ttyUSB0