Keyestudio 4DOF Manual page 268

// delay(5);
if(pos1<1) // limit the right turning angle
{
pos1=1;
}
}
// turn left
if(ps2x.Analog (PSS_RX) < 50)
{
//Serial.println(ps2x.Analog(PSS_RX), DEC);
pos1=pos1+1; //pos1 plus 1
myservo1.write(pos1);
// delay(5);
if(pos1>180) // limit the left turning angle
{
pos1=180;
}
}
}
//**********************************************************************
// the upper arm
void xiaobi()
{
// upper arm front
if(ps2x.Analog(PSS_RY)<50) // if push the right joystick upward
{
// if push the right joystick to the left
// the robot arm turns left
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