Keyestudio 4DOF Manual page 159

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// lower arm
void dabi()
{
if(y2>1000) // if push the left joystick upward
{
pos3=pos3-1;
myservo3.write(pos3); // the lower arm will stretch out
delay(5);
if(pos3<35) // limit the stretched angle
{
pos3=35;
}
}
if(y2<50) // if push the right joystick downward
{
pos3=pos3+1;
myservo3.write(pos3); // the lower arm will draw back
delay(5);
if(pos3>180) // limit the retraction angle
{
pos3=180;
}
}
}
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