pigpio/example/servo.js

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

'use strict';

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

const motor = new Gpio(10, {mode: Gpio.OUTPUT});

let pulseWidth = 1000;
let increment = 100;

setInterval(() => {
  motor.servoWrite(pulseWidth);

  pulseWidth += increment;
  if (pulseWidth >= 2000) {
    increment = -100;
  } else if (pulseWidth <= 1000) {
    increment = 100;
  }
}, 1000);