Watch Face screen - Heart Rate sensor - Garmin Forerunner 45

Former Member over 4 years ago

Hi everyone.
I tried to develop watch face app for myself only for my watch Garming Forerunner 45, but I can't programm the heart rate properly.
I was reading for 6 hours all the topics related with answers from jm_m_58

But sadly, Activity or ActivityMonitor doesn't work, it just read the array of results from last Activity - sadly Watch Face on this watch is not an activity.

I tried to use sensor, I even gave permission to use sensor in manifest.xml, but whenever I try to debug an app I still do receive an error about sensor missing permissions..........

Is it a bug or what? I know that any app from store doesn't work on this watch (heart rate on watch face), but there are some pre-builts watchfaces with working sensor.

What to do?

Right now I will try to repair permissions inside sdk, because it is weird that this option is clickable inside Eclipse, but app still says something about missing permissions.

Thanks in advance.

Top Replies

9635560 over 4 years ago +1 verified

1. Did you do "Simulate data" in the simulator?

2. Are you using classes supported by your device? (FR45 is CIQ1, I think, despite being newish. SensorHistory at least is CIQ2+)

developer.garmin…
9635560 over 4 years ago in reply to Former Member +1 verified
https://developer.garmin.com/connect-iq/api-docs/Toybox/Sensor.html
```
Since:

1.0.0

App Types:

Watch App
Audio Content Provider
Background
Data Field
Widget
```
Sensor not available to "Watch Face…
jim_m_58 over 4 years ago in reply to 9635560 +1 verified

You can't use Sensor in a watchface.

The way to get heart rate is

check Activity.getActivityInfo().currentHeartRate

While you're not in an activity, this field does update. In the sim, you need…

All Replies

0 9635560 over 4 years ago

1. Did you do "Simulate data" in the simulator?

2. Are you using classes supported by your device? (FR45 is CIQ1, I think, despite being newish. SensorHistory at least is CIQ2+)

developer.garmin.com/.../SensorHistory.html

0 9635560 over 4 years ago

1. Did you do "Simulate data" in the simulator?

2. Are you using classes supported by your device? (FR45 is CIQ1, I think, despite being newish. SensorHistory at least is CIQ2+)

developer.garmin.com/.../SensorHistory.html

0 Former Member over 4 years ago in reply to 9635560

1. Yes, I also move the app to the watch and tried in real time - didn't work
2. Yes, I can read that Toyboy.Sensor is support from 1.0.0+, but on running the app I receive

Error: Permission Required
Details: Module 'Toybox.Sensor' not available to 'Watch Face'.

So this class is available as you can see, but this is permission error.

0 9635560 over 4 years ago in reply to Former Member

https://developer.garmin.com/connect-iq/api-docs/Toybox/Sensor.html

Since:

1.0.0

App Types:

Watch App
Audio Content Provider
Background
Data Field
Widget

Sensor not available to "Watch Face".

0 Former Member over 4 years ago in reply to 9635560

So do anyone know the solution? I am 100% sure it is possible to use heart rate sensor on Watch Face, because it is pre-built. I would love to see the source code of those solutions but I don't think that's possible?

0 jim_m_58 over 4 years ago in reply to 9635560

You can't use Sensor in a watchface.

The way to get heart rate is

check Activity.getActivityInfo().currentHeartRate

While you're not in an activity, this field does update. In the sim, you need to run Simulation>Fit data to get data. Simulate data has HR info, and if you play back a fit, it needs to be one with hr data,

if it's null, fall back to the newest reading in getHeartRateHistory() The ActMon version is "since 1.2.1", while the SensorHistory version, since 2.1.0, so the ActMon version is available on the fr45.

With a fr45, the display only updates every minute most times, so you won't see rapid changes in HR. For the fr45, I use the ActMon version in Simple Heart.

You can see how this works with my Simple Heart on the fr45

0 Former Member over 4 years ago in reply to jim_m_58

OK I see... so it works... but I wasn't recognizing that it works..

Ok another question.

I see that my secreen freezes, since the second timer stops, what could be the issue? what function should I use, onUpdate or on partialUpdate? It was working fine yesterday I guess

0 9635560 over 4 years ago in reply to Former Member

https://developer.garmin.com/connect-iq/api-docs/Toybox/WatchUi/WatchFace.html#onPartialUpdate-instance_function

Only available since 2.3.0.

Can't have partial update on fr45

0 jim_m_58 over 4 years ago in reply to Former Member

The fr45 doesn't support onPartialUpdate (that's why the HR usually only updates every minute.)

After a gesture, a WF drops out of low power mode for 10 seconds and updates every second.

onEnterSleep() signals you are in low power (don't display seconds) and onExitSleep() indicates 1 second updates.

So something like

    function onEnterSleep() {
    	inLowPower=true;
    	WatchUi.requestUpdate(); 
    }
    
        function onExitSleep() {
        inLowPower=false;
    }

and don't display seconds if inLowPower==true

0 Former Member over 4 years ago in reply to jim_m_58

But for example analog Watch Face clock never stops the seconds clock arms, I want to achieve that.