SunFounder PiCar-4WD, Руководство пользователя

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Grayscale
On this page, you can adjust the threshold of the line following and cliff detection.
Line Reference
Put the Picar-4wd on the white surface and record these three values of Grayscale. Now the value of
Grayscale is large enough, about 1500. Then put the grayscale sensor module of Picar-4wd above the black
surface and record these three values of Grayscale. Now, the value of Grayscale gets relatively small, about
150 as is predicted. So we set the value of Line Reference to 400. Of course, you can change the value. Once
you finish doing this, you can see that the corresponding area turning into gray if the value of Grayscale is
larger than 400; if not so, turning into black.
Cliff Reference
Put the car at the edge of the desk with the car’s head sticking out from the desk. Record three values of
Grayscale, and now the value is relatively small, less than 100. Please set the value of Cliff Reference to 110.
When you finish doing this, the corresponding area appears red exclamation symbol if the value of
Grayscale is less than 110.