control a 433Mhz switch with nodejs using rpio

rcswitch.js

const rpio = require('rpio')
rpio.init({mapping: 'gpio'})
rpio.open(17, rpio.OUTPUT)

const defaultProtocol = {
  tristate: true,
  pulseLength: 350,
  zero: {high: 1, low: 3},
  one: {high: 3, low: 1},
  sync: {high: 1, low: 31}
}

let send = (code, protocol = {}) => {
  protocol = Object.assign({}, defaultProtocol, protocol)
  transmit(protocol.sync, protocol.pulseLength)
  for (let i = 0; i < code.length; i++) {
    const char = code.charAt(i)
    if (char === '0') { transmit(protocol.zero, protocol.pulseLength) }
    if (char === '0' && protocol.tristate) { transmit(protocol.zero, protocol.pulseLength) }

    if (char === '1') { transmit(protocol.one, protocol.pulseLength) }
    if (char === '1' && protocol.tristate) { transmit(protocol.one, protocol.pulseLength) }

    if (char === 'F' && protocol.tristate) { transmit(protocol.zero, protocol.pulseLength) }
    if (char === 'F' && protocol.tristate) { transmit(protocol.one, protocol.pulseLength) }
  }
}

let transmit = (pulses, pulseLength) => {
  rpio.write(17, rpio.HIGH)
  rpio.usleep(pulseLength * pulses.high)
  rpio.write(17, rpio.LOW)
  rpio.usleep(pulseLength * pulses.low)
}

for (let i = 0; i < 10; i++) {
  send('0F00F' + 'FF0FF' + '0F', {})
}