485 device logic name

[mickeyouyou]

https://stackoverflow.com/questions/4800099/how-to-identify-multiple-usb-serial-adapters-under-ubuntu-10-1?noredirect=1

by dev path

KERNEL=="ttyUSB*", ATTRS{devpath}=="3",ATTRS{idVendor}=="10c4", ATTRS{idProduct}=="ea60", MODE:="0777",SYMLINK+="imu1"
KERNEL=="ttyUSB*", ATTRS{devpath}=="4",ATTRS{idVendor}=="10c4", ATTRS{idProduct}=="ea60", MODE:="0777",SYMLINK+="imu2"

1、先确定你需要操作的设备是哪一个tty
2、查询具体的字段，比如serial 最为直接

udevadm info -n /dev/ttyUSB0 -a | grep serial

3、更新规则

4、重启udev设备挂载规则

sudo  udevadm control --reload
sudo service udev restart

# find key port 

RFID FDTI DRIVER FOR LINUX

Manual https://wiki.diustou.com/w/upload/e/e1/USB_TO_RS232_485_TTL_-user-manual-cn.pdf

https://www.ftdichip.com/Support/Documents/AppNotes/AN_220_FTDI_Drivers_Installation_Guide_for_Linux.pdf

https://www.ftdichip.com/Drivers/D2XX/Linux/libftd2xx-x86_64-1.4.8.gz

https://www.corvin.cn/474.html