Tizen Developers

Hi~,

You may use code like below:

/*********************************************************
* [Step 1] Add the alarm privilege in config.xml
**********************************************************/
<?xml version="1.0" encoding="UTF-8"?>
<widget xmlns="http://www.w3.org/ns/widgets" 
    ...
    <TIZEN:PRIVILEGE name="http://tizen.org/privilege/alarm" />    
    ...
</widget>


/*********************************************************
* [Step 2] Add eventListener for timetick in the ambient mode
**********************************************************/
window.addEventListener('timetick', function() {
    // TODO : Update the ambient view    
    updateAmbientWatch(); 
}); 


/*********************************************************
* [Step 3] Add eventListener for ambientmodechanged
**********************************************************/
window.addEventListener('ambientmodechanged', function(e) { 
    if (e.detail.ambientMode === true) {        
        // TODO : Rendering ambient mode case         
        updateAmbientWatch(); 
    } else {             
        // TODO : Rendering normal case    
        updateNormalWatch(); 
        
        watchInterval = setInterval(function() { 
            updateNormalWatch();
        }, 1000); 
    }    
});

Hope it will help you.
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Try also with http://tizen.org/privilege/alarm.set
To know more about event handling please see:

https://developer.tizen.org/development/training/web-application/understanding-tizen-programming/event-handling
 

You may use api for detecting motion sensor changed value or as you say heart rate sensor I think.

Combination of different indirect measure you may have this does, I think.
Check https://developer.tizen.org/development/api-references/native-application?redirect=/dev-guide/latest/org.tizen.native.wearable.apireference/group__CAPI__CONTEXT__ACTIVITY__MODULE.html

enum activity_type_e

ACTIVITY_STATIONARY 
Stationary

And also check
https://developer.tizen.org/development/api-references/native-application?redirect=/dev-guide/latest/org.tizen.native.wearable.apireference/group__CAPI__CONTEXT__GESTURE__MODULE.html

enum gesture_event_e


GESTURE_EVENT_DETECTED 
Detected the gesture
 
GESTURE_SHAKE_DETECTED 
Shake gesture started
 
GESTURE_SHAKE_FINISHED 
Shake gesture stopped
 
GESTURE_SNAP_X_NEGATIVE 
Detected -X snap
 
GESTURE_SNAP_X_POSITIVE 
Detected +X snap
 
GESTURE_SNAP_Y_NEGATIVE 
Detected -Y snap
 
GESTURE_SNAP_Y_POSITIVE 
Detected +Y snap
 
GESTURE_SNAP_Z_NEGATIVE 
Detected -Z snap
 
GESTURE_SNAP_Z_POSITIVE 
Detected +Z snap

enum gesture_type_e
GESTURE_WRIST_UP 
The wearable device is moved and faced up

Thanks man