Keyestudio Smart Little Turtle Robot V3 Manual page 166

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pattern
The specific logic of ultrasonic follow robot car is as shown below:
Detection
Setting
Condition
Status
Condition
Status
Condition
Status
Condition
Status
Flow Chart
Measured distance of front
obstacles
Set servo to 90°
Make dot matrix show smile face pattern
Distance＜8
Go back（PWM set to 200）
distance≥8 and distance＜13
Stop
distance≥13 and distance＜35
Go front（PWM set to 200）
distance≥35
stop
distance
（unit： cm）
166