uci-i2c-bus/examples/np-relay.js

/*
*  A tcp customer/client to talk with the i2c bus and scan the bus for devices
*
*/

const PATH = 'i2c-bus'

import Base from  '@uci/base'

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

  let relays = new Base({id:'pipe-i2c-client', sockets:'uc#c>n', uc:{path:PATH}})

  relays.reply = function (packet) {
    // console.log(packet.bus)
    console.log(`response from relays for ${packet.cmd_sent}:`,packet.args, `was ${packet.response}`)
  }
  await relays.init()
  console.log('=============sending============')
  let packet = {cmd:'read', args:{address:39 ,cmd: 0} }
  console.dir(packet)
  await relays.send(packet)
  packet = {cmd:'write', args:{address:39,cmd: 0, byte:0} }
  console.dir(packet)
  await relays.send(packet)
  packet = {cmd:'read', args:{address:39 ,cmd:0} }
  console.dir(packet)
  await relays.send(packet)
  packet = {cmd:'write', args:{address:39,cmd: 9, byte:255} }
  console.dir(packet)
  await relays.send(packet)
  packet = {cmd:'read', args:{address:39 ,cmd:9} }
  console.dir(packet)
  await relays.send(packet)
  await delay(1000)
  packet = {cmd:'write', args:{address:39,cmd: 9, byte:0} }
  console.dir(packet)
  await relays.send(packet)
  packet = {cmd:'read', args:{address:39 ,cmd:9} }
  console.dir(packet)
  await relays.send(packet)

  await delay(1000)
  process.kill(process.pid, 'SIGTERM')


})().catch(err => {
  console.error('FATAL: UNABLE TO START SYSTEM!\n',err)
})