Dear All:

the system cannot find the following lib. Could someone give me a hint?

  import pytest
  | from baseline_data import get_reference_data, primitives
  | from helpers import Mock, serial, call, setup_function, assert_invalid_dimensions  # noqa: F401

The ST7567 1.8 LCD is not lighted up even I wired it as exactly what the document said.
How to turn on the backlight?
It mentioned that GPIO18 can be used for backlight how to wire and code that?

Thanks a lot.
xipo