Keyestudio 4DOF Manual page 195

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//right now, the library does NOT support hot pluggable controllers,
meaning
//you must always either restart your Arduino after you connect the
controller,
//or call config_gamepad(pins) again after connecting the controller.
int error = 0;
byte vibrate = 0;
#include <Servo.h> // add the servo libraries
Servo myservo1; // create servo object to control a servo
Servo myservo2;
Servo myservo3;
Servo myservo4;
int pos1=80, pos2=60, pos3=130, pos4=0; // define the variable of 4
servo angle and assign the initial value( that is the boot posture angle
value)
void setup(){
Serial.begin(57600);
// boot posture
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