远程的登录后

输入：

cd /home/HwHiAiUser/E2ESamples/src/E2E-Sample/Car/python 

pip3 install -r requirements.txt 

python3 main.py

报错显示：

CTraceback (most recent call last):

File "/home/HwHiAiUser/E2ESamples/src/E2E-Sample/Car/python/src/utils/controller.py", line 139, in send_to_device

self._ser.write(msg)

File "/usr/local/miniconda3/lib/python3.9/site-packages/serial/serialposix.py", line 615, in write

raise PortNotOpenError() serial.serialutil.

PortNotOpenError: Attempting to use a port that is not open

出现串口连接不上

请问是哪一步出现错误了啊？怎么解决呢？