void setup()
{ 
ServoPin(15);
} 


void loop(){


for(int pos=0 ; pos<=180 ; pos++){
Servo(pos);
delay(10);}

for(int pos=180 ; pos>=0 ; pos--){
Servo(pos);
delay(10);}


} 














void ServoPin(const int Pin){
//f = 1/T ; karena 1 siklus pulse servo = 20 ms, maka f= 1/0,02s = 50 Hz   
const int freq       = 50; 
const int ledChannel = 0 ;
const int resolution = 16;

  ledcSetup(ledChannel, freq, resolution);
  
  // attach the channel to the GPIO to be controlled
  ledcAttachPin(Pin, ledChannel);

}


void Servo(int Position ){
const int ledChannel = 0;
const int resolution = 16 ;

int BIT        = pow(2,resolution);
int Posisi_0   = BIT*0.025; // 0,5 ms /20 ms PWM Posisi 0
int Posisi_180 = BIT*0.125; // 2,5 ms /20 ms PWM Posisi 180
int PWM        = map(Position,0,180,Posisi_0,Posisi_180);

ledcWrite(ledChannel, PWM);
}