static uint8_t duty;
void setup()
{
	Serial.begin(115200);
	delay(1000);
	pinMode(2, OUTPUT);
	digitalWrite(2, LOW);
	if(ledcAttach(2, 1, 20))
	{
		Serial.printf("PWM using LEDC is successfully setup at GPIO2!\n");
		Serial.flush();
		Serial.printf("Clock source used: %d\n", ledcGetClockSource());
		Serial.flush();

		Serial.println("Starting LED fade on GPIO2...");
		ledcWrite(2, 524287);
	}
	else
	{
		Serial.printf("PWM setup at GPIO2 failed :(");
		Serial.flush();
	}
}

void loop()
{
	/* for(duty = 0; duty <= 255; duty++)
		ledcWrite(2, duty);
	for(duty = 255; duty >= 0; duty--)
		ledcWrite(2, duty); */
}