Bluetooth Communication and JavaScript - sending receiving information

Right to it then...

I am using an HC-05 bluetooth module to communicate with my HTML CSS JAVASCRIPT mobile phone application.

I am hoping someone is able to help me with the communication.

SNIPPET OF ARDUINO IN LOOP

  if(Serial.available()>0)
{
  Serial.println("Trying to assign drillnumber and reps to variables");
  drillnumber = Serial.read();
  Serial.println(drillnumber);
  reps = Serial.read();
  Serial.println(reps);
}

However, sometimes i get the correct drillnumber sent over - ex. "1" and reps number -ex "5"
other times they print out
1
255
5
255

javascript

var drill = 0;
when button pressed

drill = this.title;

            var $elSlider = $("#slider");
            reps = parseInt($elSlider.val());
            console.log(drill);
            console.log(reps);
            var drillreps = [drill, reps];
            console.log(drillreps);
            bluetoothSerial.write(drillreps, function (success) {
                console.log("Data Successfully sent:" + success);
                console.log("HERE WAS .write SUCCESSFUL");
                timestart = performance.now();
                GateTotal = gates * reps;
                gatecurrent = 1;
                j = 0;
                repscount = 1;
                fnDrawTable();

Any help on transferring data would be helpful. I am using this cordova plugin

Any help on data transfer between the two objects correctly would be appreciated.

Also need the bluetooth module to send to the phone.

You do know that they have Bluetooth terminal apps in Google Play Store.