How to simply read pressure info?

JayBee over 4 years ago

Hello, may I please ask for help?

at beginning of code I set

using Toybox.Sensor;

and then in function onUpdate(dc) I am trying to read pressure with

var status = Sensor.getInfo();

var pres = status.pressure;

But at runtime I get error

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

What can I do please?

Top Replies

jim_m_58 over 4 years ago in reply to JayBee +1 verified

Set the permission for that. You can do that in a watchface. In eclipse, click the manifest file and there is a tab for permissions.

All Replies

0 surfr.dsign over 4 years ago in reply to jim_m_58

We are using also some other data from Activity Info. heartrate, altitude... is it the same? Is it not the object to use? Why not?

Is there any documentation regarding this? I would like to know a bit more...

0 jim_m_58 over 4 years ago in reply to surfr.dsign

There's different ways to get info, and one might not be that different from another. SensorHistory is easy and instead of just a value, you can also draw a chart.

0 surfr.dsign over 4 years ago in reply to jim_m_58

We are happy with just a value.

Just wanted to know why it is not the "right one" if we read it from Activity.getActivityInfo()..

It is more complicated using SensorHistory.getPressureHistory() if we have to build a background service just for that. Way more.

0 jim_m_58 over 4 years ago in reply to surfr.dsign

It's not wrong to use Activity.Info, it's just that there are different ways based on a specific app, and not everyone does it the same way in watch faces, for example..

0 surfr.dsign over 4 years ago in reply to jim_m_58

The question here is... why do we have a different reading from SensorHistory.getPressureHistory(), last sample, and Activity.getActivityInfo().ambientPressure ?? Should not they provide the same value??

0 surfr.dsign over 4 years ago in reply to surfr.dsign

No clue?

0 jim_m_58 over 4 years ago in reply to surfr.dsign

Sensor History only saves readings every couple minutes, vs real time. And no, they don't always show the same thing, as there can be an adjustment set by the user.

0 jim_m_58 over 4 years ago in reply to jim_m_58

Also, have you noticed in Activity.Info there is not only ambientPressure but rawAmbientPressure?

0 surfr.dsign over 4 years ago in reply to jim_m_58

Yes, as we wrote before, we are using Activity.getActivityInfo().ambientPressure, meanSeaLevelPressure and rawAmbientPressure, and none of them seem to match the value of the pressure at GARMIN app, or the readings other watchfaces do. They might be getting the value elsewhere. I guess that from Sensor history. As I think there is no other place to get the reading.

I am assuming that Activity.getActivityInfo() gets realtime pressure info. Something that i do not know. But I guessed that at least should match the latest sample at history. But obviously it does not...

Thanks a lot for your time an your help Jim!!

0 jim_m_58 over 4 years ago in reply to surfr.dsign

Actually, there is also Sensor.getInfo().pressue