<pre class="prettyprint linenums">int freq = 50;
int ServoCh = 0;
int resolution = 8;   // 0 - 255 &gt;&gt; 10 0 - 1023 
int dutyCycle = 21;   // 10 - 32

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  delay(1000);
  Serial.println("Testing Servo");
  
ledcSetup(ServoCh,freq,resolution);
ledcAttachPin(5,ServoCh);
ledcWrite(ServoCh, dutyCycle);  // 90   
}

void loop() {
  // put your main code here, to run repeatedly:
  
ledcWrite(ServoCh, dutyCycle);
dutyCycle += 10;
Serial.println(dutyCycle);
if(dutyCycle &gt;= 255) {dutyCycle = 0;}
delay(50);
}</pre>