const int ledPin = 25;
const int freq = 5000;
const int ledChannel = 0;
const int resolution = 8;
int ram = 255;

void setup() {
  pinMode(25, OUTPUT);
  ledcSetup(ledChannel, freq , resolution );
  ledcAttachPin(ledPin, ledChannel);
  Serial.begin(115200);
}
void loop() {
  ledcWrite(ledChannel,ram);
  Serial.printf("0, 255, %d\n",ram);
  delay(15);
}