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Activity data displays in simulation and not on Garmin device

Former Member
Former Member

I have managed to create a simple WatchApp that uses ActivityRecording and Activity to access sensors such as heart rate, speed, and calories. My app works fine in simulation but when I take it outside to test the speed and heart rate data displays as null and calories is a consistent 0. My code is as follows:

using Toybox.Graphics;
using Toybox.WatchUi;
import Toybox.Activity;
import Toybox.Timer;
import Toybox.Lang;
using Toybox.ActivityMonitor;
using Toybox.System;
using Toybox.ActivityRecording;
import Toybox.Sensor;

class TestAppActivityTracker extends WatchUi.View {
var currentSpeed = 0;
var caloriesBurned = 0;
var heartRate = 0;
var _session as Session?; // set up session variable

function initialize() {
var i;
Sensor.setEnabledSensors([Sensor.SENSOR_HEARTRATE,Sensor.SENSOR_BIKESPEED]);
View.initialize();

//for(i = 0; i<100; i++){
// View.onUpdate();
//}
}

//! Stop the recording if necessary
public function stopRecording() as Void {
if ((Toybox has :ActivityRecording) && isSessionRecording()) {
_session.stop();
_session.save();
_session = null;
WatchUi.requestUpdate();
}
}

public function isSessionRecording() as Boolean {
return (_session != null) && _session.isRecording();
}
//! Start recording a session
public function startRecording() as Void {
_session = ActivityRecording.createSession({ // set up recording session
:name=>"Biking", // set session name
:sport=>ActivityRecording.SPORT_GENERIC, // set sport type
:subSport=>ActivityRecording.SUB_SPORT_GENERIC // set sub sport type
});
_session.start();
WatchUi.requestUpdate();
}


function onTimer() {
WatchUi.requestUpdate();
}


function onShow(){
var timer = new Timer.Timer();
timer.start( method(:onTimer), 1000, true );
if (Toybox has :ActivityRecording) {
if (!isSessionRecording()) {
startRecording();
}
}
}

function onHide(){
if (Toybox has :ActivityRecording) {
if (isSessionRecording()) {
stopRecording();
}
}
}

function onUpdate(dc as Dc) as Void {
dc.clear();
dc.setColor(Graphics.COLOR_WHITE, Graphics.COLOR_TRANSPARENT);
dc.fillRectangle(0, 0, dc.getWidth(), dc.getHeight());


var activeInfo = Activity.getActivityInfo();
heartRate = activeInfo.currentHeartRate;
currentSpeed = activeInfo.currentSpeed;
caloriesBurned = activeInfo.calories;


dc.setColor(Graphics.COLOR_BLACK, Graphics.COLOR_TRANSPARENT);
dc.drawText(
dc.getWidth() / 6, // gets the width of the device and divides by 2
dc.getHeight() / 6, // gets the height of the device and divides by 2
Graphics.FONT_SMALL, // sets the font size
"Speed", // the String to display
Graphics.TEXT_JUSTIFY_CENTER // sets the justification for the text
);


dc.drawText(
dc.getWidth() / 4, // gets the width of the device and divides by 2
dc.getHeight() / 4, // gets the height of the device and divides by 2
Graphics.FONT_SMALL, // sets the font size
currentSpeed, // the String to display
Graphics.TEXT_JUSTIFY_CENTER // sets the justification for the text
);

dc.setColor(Graphics.COLOR_BLACK, Graphics.COLOR_TRANSPARENT);
dc.drawText(
dc.getWidth() - dc.getWidth() / 3, // gets the width of the device and divides by 2
dc.getHeight() / 6, // gets the height of the device and divides by 2
Graphics.FONT_SMALL, // sets the font size
"Heart rate", // the String to display
Graphics.TEXT_JUSTIFY_CENTER // sets the justification for the text
);


dc.drawText(
dc.getWidth() - dc.getWidth() / 4, // gets the width of the device and divides by 2
dc.getHeight() / 4, // gets the height of the device and divides by 2
Graphics.FONT_SMALL, // sets the font size
heartRate, // the String to display
Graphics.TEXT_JUSTIFY_CENTER // sets the justification for the text
);

dc.setColor(Graphics.COLOR_BLACK, Graphics.COLOR_TRANSPARENT);
dc.drawText(
dc.getWidth() - dc.getWidth() / 3, // gets the width of the device and divides by 2
dc.getHeight() - dc.getHeight() / 3, // gets the height of the device and divides by 2
Graphics.FONT_SMALL, // sets the font size
"Calroies", // the String to display
Graphics.TEXT_JUSTIFY_CENTER // sets the justification for the text
);


dc.drawText(
dc.getWidth() - dc.getWidth() / 4, // gets the width of the device and divides by 2
dc.getHeight() - dc.getHeight() / 4, // gets the height of the device and divides by 2
Graphics.FONT_SMALL, // sets the font size
caloriesBurned, // the String to display
Graphics.TEXT_JUSTIFY_CENTER // sets the justification for the text
);


}


}

  • 0

    This is a device app based on the code.  You're missing a couple of things.  You want to enable HR for example.

    Sensor.setEnabledSensors([Sensor.SENSOR_HEARTRATE]);

    And you may want to use GPS

    Position.enableLocationEvents(Position.LOCATION_CONTINUOUS, method(:onPosition));

    (and have a

    function onPosition(info) {

    }

  • Former Member
    0 Former Member in reply to jim_m_58

    Hi, thanks for the response. I have enabled heart rate in the initialize function, is this an okay place for this? Should I start the recording in onPosition? If not what is it that should go in said function?

  • 0 in reply to Former Member

    Enabling HR in initialize is fine.  The way I typically do GPS, is I start it in a similar place, but I don't start recording until there is a GPS fix (it can take some time) and then do it based on a button press.

    That's also how I stop recording - a button press.

    Look at the record sample in the SDK.

  • Former Member
    0 Former Member in reply to jim_m_58

    Okay I will try that, thanks for the help

  • Former Member
    0 Former Member in reply to Former Member

    So I tried to start the recording in the onPosition(info) function and all the data displayed on the screen is now null including calories that used to be 0. I don't think the program ever enters onPosition I believe I have all the relevant permissions allowed so I dont know why this would be. 

    function initialize() {
    var i;
    Sensor.setEnabledSensors([Sensor.SENSOR_HEARTRATE,Sensor.SENSOR_BIKESPEED]);
    Position.enableLocationEvents(Position.LOCATION_CONTINUOUS, method(:onPosition));
    View.initialize();

    //for(i = 0; i<100; i++){
    // View.onUpdate();
    //}
    }
    function onPosition(info){
    if (Toybox has :ActivityRecording) {
    if (!isSessionRecording()) {
    startRecording();
    }
    }



    }

    //! Stop the recording if necessary
    public function stopRecording() as Void {
    if ((Toybox has :ActivityRecording) && isSessionRecording()) {
    _session.stop();
    _session.save();
    _session = null;
    WatchUi.requestUpdate();
    }
    }

    public function isSessionRecording() as Boolean {
    return (_session != null) && _session.isRecording();
    }
    //! Start recording a session
    public function startRecording() as Void {
    _session = ActivityRecording.createSession({ // set up recording session
    :name=>"Biking", // set session name
    :sport=>ActivityRecording.SPORT_GENERIC, // set sport type
    :subSport=>ActivityRecording.SUB_SPORT_GENERIC // set sub sport type
    });
    _session.start();
    WatchUi.requestUpdate();
    }


    function onTimer() {
    WatchUi.requestUpdate();
    }


    function onShow(){
    var timer = new Timer.Timer();
    timer.start( method(:onTimer), 1000, true );

    }

    function onHide(){
    if (Toybox has :ActivityRecording) {
    if (isSessionRecording()) {
    stopRecording();
    }
    }
    }

  • 0 in reply to Former Member

    onPosition is called about every second.

    Look at the recordsample in the SDK.

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