generic pause/wait?

@allObjects So far I have:

I2C1.setup({scl:b6, sda:b7});

function Sensor (theType, theAddress) {
  this.type = theType;   //i.e. PH
  this.address = theAddress;  //i2c Address
  this.sensorResult = 0; //Store sensor result
  this.cmdTable = {
    'Calibrate' : {  //List of Calibration commands and timeout value.
      "clear" : { "cmd" : "Cal,Clear",      "wait" : 300  },
      "mid"   : { "cmd" : "Cal,mid,7.00",   "wait" : 1300 },
      "low"   : { "cmd" : "Cal,low,4.00",   "wait" : 1300 },
      "high"  : { "cmd" : "Cal,high,10.00", "wait" : 1300 },
      "query" : { "cmd" : "Cal,?",          "wait" : 300  }
    },
    'Information' : {  //Device Information

    },
    'LED' : {  //Enable / Disable or Query the LEDs
      "L0" : { "cmd" : "L,0", "wait" : 300 },
      "L1" : { "cmd" : "L,1", "wait" : 300 },
      "L?" : { "cmd" : "L,?", "wait" : 300 }
    },
    'Reading' : {  //Takes a single reading
      "R" : { "cmd" : "R,?", "wait" : 1000 } //Takes a single temperature compensated reading
    },
    'Serial'      : {  //Switch back to UART mode

    },
    'Sleep'       : {  //Enter low power sleep mode

    },
    'Status'      : {  //Retrieve status information

    },
    'Temperature' : {  //Set or Query the temperature compensation
      "T"  : { "cmd" : "T,19.5", "wait" : 300 },  //Where the temperature is any value; floating point, or int, in ASCII form
      "T?" : { "cmd" : "T,?",   "wait" : 300 }  //Query the set temerature
    },
    'Factory'     : {  //Factory reset

    },
  };
}

Sensor.prototype = {
  constructor: Sensor,
  getSensorType:function () {
    return this.type; //Get Sensor type
  },
  getSensorAddress:function () {
    return this.address; //Get Sensor address
  },
  getSensorResult:function () {
    //I2C1.read
  },
  storeSensorResult:function () {

  },
  updateResTemp:function (temp) {
    var reading = cmdTable.Reading.R.cmd;
    reading = "R," + temp;
    Console.log(reading);
  }
};

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

ph.updateResTemp(90.5);

Is that what you are refering too? I am new to Javascript objects and etc... For example, in order for me to get the sensor result I would invoke getSensorResult and grab the values from the cooresponding Sensor object and setTimeout to whatever the wait value is of the specific cmd?

Also, to take a Reading in i2c I am required to pass the temperature along with the R to get a temperature compensated result. I have the default command as R,19.5. How would I update the cmd to the newely taken temperature value? I tried to change the value and I receive the following error:

Uncaught Error: Field or method does not already exist, and can't
create it on undefined at line 2 col 27

var reading = cmdTable.Reading.R.cmd;   e                        ^ in function "updateResTemp" called rom line 1 col 22

ph.updateResTemp(90.5);

I fixed the error
new and complete code:

I2C1.setup({scl:b6, sda:b7});

function Sensor (theType, theAddress) {
  this.type = theType;   //i.e. PH
  this.address = theAddress;  //i2c Address
  this.sensorResult = 0; //Store sensor result
  this.cmdTable = {
    "Calibrate" : {  //List of Calibration commands and timeout value.
      "clear" : { "cmd" : "Cal,Clear",      "wait" : 300  },
      "mid"   : { "cmd" : "Cal,mid,7.00",   "wait" : 1300 },
      "low"   : { "cmd" : "Cal,low,4.00",   "wait" : 1300 },
      "high"  : { "cmd" : "Cal,high,10.00", "wait" : 1300 },
      "query" : { "cmd" : "Cal,?",          "wait" : 300  }
    },
    "Information" : {  //Device Information

    },
    "LED" : {  //Enable / Disable or Query the LEDs
      "L0" : { "cmd" : "L,0", "wait" : 300 },
      "L1" : { "cmd" : "L,1", "wait" : 300 },
      "L?" : { "cmd" : "L,?", "wait" : 300 }
    },
    "Reading" : {  //Takes a single reading
      "R" : { "cmd" : "R,?", "wait" : 1000 } //Takes a single temperature compensated reading
    },
    "Serial"      : {  //Switch back to UART mode

    },
    "Sleep"       : {  //Enter low power sleep mode

    },
    "Status"      : {  //Retrieve status information

    },
    "Temperature" : {  //Set or Query the temperature compensation
      "T"  : { "cmd" : "T,19.5", "wait" : 300 },  //Where the temperature is any value; floating point, or int, in ASCII form
      "T?" : { "cmd" : "T,?",   "wait" : 300 }  //Query the set temerature
    },
    "Factory"     : {  //Factory reset

    },
  };
}

Sensor.prototype = {
  constructor: Sensor,
  getSensorType:function () {
    return this.type; //Get Sensor type
  },
  getSensorAddress:function () {
    return this.address; //Get Sensor address
  },
  getSensorResult:function () {
    //I2C1.read
  },
  storeSensorResult:function () {

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