Code for ESP8266 PWM Tutorial. LED Fading using ESP8266 WiFi Module.

ESP8266_PWM_LED_Fading.ino

#include <ESP8266WiFi.h>
#define ledPin 2
 
int brightness = 0;
int fadeAmount = 1;
 
void setup() 
{
  Serial.begin(115200);
  pinMode(ledPin,OUTPUT);
}
 

void loop() 
{
  
  Serial.println("10% Duty Cycle");
  analogWrite(ledPin,102);
  delay(2000);
 
  Serial.println("20% Duty Cycle");
  analogWrite(ledPin,205);
  delay(2000);
 
  Serial.println("50% Duty Cycle");
  analogWrite(ledPin,511);
  delay(2000);
 
  Serial.println("70% Duty Cycle");
  analogWrite(ledPin,714);
  delay(2000);
 
  Serial.println("100% Duty Cycle");
  analogWrite(ledPin,1023);
  delay(2000);
 
  
  Serial.println("LED Fadding begins.....");
  while(1)
  {
    analogWrite(ledPin, brightness);
    brightness = brightness + fadeAmount;
  
    if (brightness <= 0 || brightness >= 1023) 
    {
      fadeAmount = -fadeAmount;
    }
    delay(10);
  }
}