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#include <Arduino.h>
#include <math.h>

const int pwmPin = 16;      // Example PWM pin
const int pwmFrequency = 5000; // Example frequency
const int pwmResolution = 8;  // Example resolution (0-255)
const int ledcChannel = 0; // Example channel

const float amp = 127.5; // Half of the max value (255/2)
const float stp = 0.1;  // Step size for the sine wave
float i = 0;

void setup() {
  ledcSetup(ledcChannel, pwmFrequency, pwmResolution);
  ledcAttachPin(pwmPin, ledcChannel);
}

void loop() {
  int dutyCycle = (int)(amp + amp * sin(stp * i)); // Calculate the duty cycle
  ledcWrite(ledcChannel, dutyCycle);             // Write the duty cycle
  i += 1; // Increment the iterator
  delay(10); // Add a small delay to control the speed
}