PWMExample.ino

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#include <ESP32Servo.h>
int APin = 13;
ESP32PWM pwm;
int freq = 1000;
void setup() {
    // Allow allocation of all timers
    ESP32PWM::allocateTimer(0);
    ESP32PWM::allocateTimer(1);
    ESP32PWM::allocateTimer(2);
    ESP32PWM::allocateTimer(3);
    Serial.begin(115200);
    pwm.attachPin(APin, freq, 10); // 1KHz 8 bit

}
void loop() {

    // fade the LED on thisPin from off to brightest:
    for (float brightness = 0; brightness <= 0.5; brightness += 0.001) {
        // Write a unit vector value from 0.0 to 1.0
        pwm.writeScaled(brightness);
        delay(2);
    }
    //delay(1000);
    // fade the LED on thisPin from brithstest to off:
    for (float brightness = 0.5; brightness >= 0; brightness -= 0.001) {
        freq += 10;
        // Adjust the frequency on the fly with a specific brightness
        // Frequency is in herts and duty cycle is a unit vector 0.0 to 1.0
        pwm.adjustFrequency(freq, brightness); // update the time base of the PWM
        delay(2);
    }
    // pause between LEDs:
    delay(1000);
    freq = 1000;
    pwm.adjustFrequency(freq, 0.0);    // reset the time base
}