'use strict'

const i2c = require('i2c-bus'),
      pA = require('bluebird').promisifyAll,
      PQ = require('promisqueue')


class Bus {
       constructor(busnum) {
       this.methods = pA(i2c.open(busnum,()=>{}),{suffix: "_p" })  //,multiArgs: true})
       this.q = new PQ({ limit: 1})
     }

scan(){ return this.bus.scan_p()}
close(){ return this.bus.close_p()}

qAdd(job){this.q.add(() => job)}

} // end of Bus Class

module.exports = Bus;