int PWM_FREQUENCY = 1000; // this variable is used to define the time period 
int PWM_CHANNEL = 0; // this variable is used to select the channel number
int PWM_RESOUTION = 8; // 0 a 255 this will define the resolution of the signal which is 8 in this

int GPIOPIN = 15 ; // GPIO to which we want to attach this channel signal
int dutyCycle = 255; // it will define the width of signal or also the one time
void setup()
{
ledcSetup(PWM_CHANNEL, PWM_FREQUENCY, PWM_RESOUTION);
ledcAttachPin(GPIOPIN, PWM_CHANNEL);
}
void loop() {


for (int dutyCycle = 0; dutyCycle <= 255; dutyCycle++) 
{
ledcWrite(PWM_CHANNEL, dutyCycle);
delay(100);
}
}