Keyestudio Ks0428, Manual

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photoresistor module, motor driving, to build a light-following
robot!
Just need to use 2 photoresistor modules to detect the light
intensity at the both side of robot. Read the analog value to rotate
the 2 motors, thus drive the tank robot run.
The specific logic of light following robot is shown as the table
below:
Detection
(the higher the
brightness, the greater
the value is)
Left photocell module left_light
Right photocell module right_light
If left_light＞650 and right_light＞650
Status Go forward（PWM set to 200）
If left_light＞650 and right_light≤650
Status Rotate to left（PWM set to 200）
If left_light≤650 and right_light＞650
Status Rotate to right（PWM set to 200）
If left_light≤650 and right_light≤650
Status stop