PWM with Raspberry Pi and Node.js

pwm.js

const Gpio = require('pigpio').Gpio;
 
const led = new Gpio(17, {mode: Gpio.OUTPUT});
 
let dutyCycle = 0;
 
let interval = setInterval(() => {
  led.pwmWrite(dutyCycle);
 
  dutyCycle += 5;
  if (dutyCycle > 255) {
    dutyCycle = 0;
  }
}, 20);


setTimeout(()=> {
 clearInterval(interval);
},5000);

led.pwmWrite(255);