Communications.transmit() "Out Of Memory Error"

Hello. I asked a question yesterday, and it seems I was able to identify the cause of my problem. The problem lies in the Communications.transmit() method (line 46 of the code).

import Toybox.Lang;
import Toybox.Time;  
import Toybox.Sensor;
import Toybox.WatchUi;
import Toybox.Communications;
import Toybox.Application.Storage;   

 
class AccelAppDelegate extends WatchUi.BehaviorDelegate {
    private var countOfAccelDataInArray;
    private var mySampleRate;
    private var myPeriod;
    private var listener; 

    function initialize() {
        BehaviorDelegate.initialize();

        myPeriod = 1;
        mySampleRate = 25;
        countOfAccelDataInArray = mySampleRate * myPeriod;
        listener = new Communications.ConnectionListener();

        var options = { :period => myPeriod,
                        :sampleRate => mySampleRate,
                        :enableAccelerometer => true
        };

        Sensor.registerSensorDataListener(method(:onSensor), options);
    }

    function onSensor(sensorData) {
        var accelDataToPhone = "";

        for (var i = 0; i < countOfAccelDataInArray; i++) {
            var floatX = sensorData.accelerometerData.x[i].toFloat() / 1000;
            var floatY = sensorData.accelerometerData.y[i].toFloat() / 1000;
            var floatZ = sensorData.accelerometerData.z[i].toFloat() / 1000;

            accelDataToPhone = accelDataToPhone + "\n"+Time.now().value() + ", " + floatX + ", " + floatY + ", " + floatZ;
        }

        sendMessage(accelDataToPhone);
    } 

    function sendMessage(accelDataToPhone) {
        Communications.transmit(accelDataToPhone, null, listener);
    }

    function onSelect() {
        return true;
    }

    function onMenu() as Boolean {
        WatchUi.pushView(new Rez.Menus.MainMenu(), new AccelAppMenuDelegate(), WatchUi.SLIDE_UP);
        return true;
    }
}

When I pass to this method the string that is formed in line 39 of the code, then after a few minutes the iq! icon appears on the clock, and the data transfer stops. But if I pass the string "1" to the Communications.transmit() method, then the data transfer takes a very long time, and it seems to be stable. I see this error in the logs:

---

Error: Out Of Memory Error

Details: 'Failed invoking <symbol>'

Time: 2024-01-30T10:13:42Z

Part-Number: 006-B3869-00

Firmware-Version: '9.03'

Language-Code: eng

ConnectIQ-Version: 4.2.4

Store-Id: 2c61dcda-01b6-476f-b527-0fa5edc8134a

Store-Version: 7

Filename: E1UA0959

Appname: AccelApp

Stack: 

  - pc: 0x100001f3

0x100001f3 is a 268435955

I see this in the file debug.xml

<entry filename="/Users/artemgrigoran/OtherProjects/AccelApp/source/AccelAppDelegate.mc" id="5" lineNum="39" parent="globals/AccelAppDelegate" pc="268435922" symbol="onSensor"/>
<entry filename="/Users/artemgrigoran/OtherProjects/AccelApp/source/AccelAppDelegate.mc" id="5" lineNum="42" parent="globals/AccelAppDelegate" pc="268435997" symbol="onSensor"/>

The example of data from the accelerometer in Xcode looks like this:

Question: how can I successfully transfer big data (my accelDataToPhone string) to a phone using the Communications.transmit() method, and without the problem that causes the "Out Of Memory Error" error? I use Forerunner 55.