Maix GO uart

Hello everyone,
I was trying to perform serial communication in my Maix Go board but when I entered the following command:

An error is given:
NameError: name ‘board info’ isn’t defined

The above command is copied from here:
Which should works well but now I don’t know how to solve this. Is there anyone know the reason?

hi, please refer to maixpy_scripts in github, the wiki is some how out of date