generic pause/wait?

@allObjects I appologize for not explaining myself.

For example I execute:

I2C1.writeTo(0x63, "R,25.3");

That tells the ph sensor to calculate the ph at the temp 25.3C. The ph sensor will take 1 second to calculate the ph, therefor, I will be required to wait 1 second before executing:

I2C1.readFrom(0x63, 7);

So depending on the specific command that i invoke will be require to wait what ever the wait value is before I readFrom the sensor. I hope I did a better job at explaining...

When you said:

What I understand so far is that you have the following system and
process: The system[Sys] reads[read] temperatures[temp] with
temperature sensors[Tempsensor], ph values[ph] with ph sensors, etc.
The readings[tmp,ph,etc.] are then somehow displayed, transmitted, or
made available otherwise for user or other system consummation.
Reading and follow up processing are repeated based on some kind of
schedule.

Yes, I am gathering all the sensor data and will eventually send all the calculations to my Intel Edison using UART communication; also out put all the values to 4x 4digit 7-segment displays.

Maybe a better example? :

Sensor.prototype = {
  constructor: Sensor,
  getSensorType:function () {
    return this.type; //Get Sensor type
  },
  getSensorAddress:function () {
    return this.address; //Get Sensor address
  },
  getSensorReading:function() {
    a = this.getSensorAddress;
    d = I2C1.readFrom(a, 7);
    return d;
  },
  getSensorResult:function () {
    var a = this.getSensorAddress;
    var c = this.cmdTable.Reading.R.cmd;
    var w = this.cmdTable.Reading.R.wait;
    var that = this;
    I2C1.writeTo(a, c);
    setTimeout(function (e) { that.getSensorReading(); }, w);
  },
  storeSensorResult:function () {

  },
  updateResTemp:function (temp) {
    console.log("Before: " + this.cmdTable.Reading.R.cmd);
    this.cmdTable.Reading.R.cmd = "R," + temp;
    console.log("After: " + this.cmdTable.Reading.R.cmd);
  }
};

var ph = new Sensor("ph", 0x63);

ph.updateResTemp(90.5);
ph.getSensorResult();

That last example doesn't exactly work. I receive the error:

Uncaught Error: Function "getSensorReading" not found!
 at line 1 col 8
{ this.getSensorReading(); }
        ^
in function called from system

How do I call getSensorReading() function from Sensor.prototype?
I updated my code to my working code.