uci-i2c-bus/examples/client.js

/*
*  A tcp customer/client to talk with the i2c bus manipulate an i2c device
*
*/

const DEVICE = (process.env.BUS_DEVICE || 'scan')
const TRANSPORT = (process.env.TRANSPORT || 'tcp')

import Base from  '@uci/base'

const HOST = (process.env.BUS_HOST || 'sbc')
const PORT = (process.env.BUS_PORT || 1776)
const ADDRESS = 39
let options = {id:'i2c-client', useRootNS:true}

;
(async () => {
  // import not supported by eslint, but esm does so ignore parsing error
  let {test,reply,error} = await import(`./${DEVICE}`)
  let client = new Base(options)
  if (TRANSPORT==='tcp')  client.addSocket('tcp','c','t',{host:HOST, port:1776})
   else  client.addSocket('np','c','n',{path:'i2c-bus'})
  client.reply = reply  // add reply processor
  client.error = error
  client.on('pushed', packet => {
    if (packet.error) {
      console.log('=======pushed error received=======\n', packet.error)
      console.log('==================')
    }
  })
  console.log(await client.socketsInit())

  client.on('connection:socket', async ev => {
    if (ev.state ==='connected') {
    console.log('connected continue')
    await test.call(client,ADDRESS)
    process.kill(process.pid, 'SIGTERM')
  }
  })

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