pigpio/example/pulse-led.js

Fast GPIO, PWM, servo control, state change notification, and interrupt handling on the Raspberry Pi

'use strict';

const Gpio = require('../').Gpio;

const led = new Gpio(17, {mode: Gpio.OUTPUT});

let dutyCycle = 0;

setInterval(() => {
  led.pwmWrite(dutyCycle);

  dutyCycle += 5;
  if (dutyCycle > 255) {
    dutyCycle = 0;
  }
}, 20);