uci-i2c-bus/examples/relays.js

const delay = time => new Promise(res=>setTimeout(()=>res(),time))

export async function error (packet) {
  console.log('======== error during socket/server processing')
  if(packet.msg) console.log(packet.msg)
  if(packet.error) console.log(packet.error)
  if(packet._header.request) {
    console.log('sent request was')
    console.dir(packet._header.request)
  }
  console.log('==========')
}

export function reply (packet) {
  let req = packet._header.request
  if (req.cmd !=='busFuncs') console.log(`response from relays for ${req.cmd}:`,req.args, `was ${packet.response}`)
  else {
    console.log('==========Available Bus Functions=====')
    console.dir(packet.functions)
    console.log('===============')
  }
}

export async function test (address) {
  let packet
  console.log('=============sending packets for i2c mcp23008 relay device ============')
  console.log('setting all pins to outputs')
  packet = {cmd:'write', args:{address:address,cmd: 0} }
  console.dir(packet)
  await this.send(packet)
  packet = {cmd:'read', args:{address:address ,cmd:0} }
  console.dir(packet)
  await this.send(packet)
  console.log('========= turn on each relay ============')
  let byte = 0
  for (let i = 0; i < 8 ; i++) {
    byte += Math.pow(2,i)
    packet = {cmd:'write', args:{address:address,cmd: 9, byte:byte} }
    console.log(`==== relay ${i+1} on with byte: ${byte} ===`)
    console.dir(packet)
    this.send(packet)
    packet = {cmd:'read', args:{address:address ,cmd:9} }
    console.dir(packet)
    this.send(packet)
    await delay(300)
  }
  console.log('========= done each relay, clear (off) this ============')
  packet = {cmd:'write', args:{address:address,cmd: 9, byte:0} }
  console.dir(packet)
  await this.send(packet)
  packet = {cmd:'read', args:{address:address ,cmd:9} }
  console.dir(packet)
  await this.send(packet)
  await delay(1000)
}