在连接和不连接串口设备时使用两次
lsusb
找到变化的项目，并记录vendor和product，使用
modprobe usbserial vendor=0x067b product=0x2303
数值根据记录自己确定
dmesg | grep "ttyUSB"
dmesg | grep "ttyUSB"
显示的结果就是串口名称，我现在所用的串口名为/dev/ttyUSB0
sudo chmod 777 /dev/ttyUSB0
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