Retrieve ambient pressure in foreground

With a watch face, you can only access Sensor data in a background service.

Try Activity.getActivityInfo().ambientPressure in the foreground

Be sure to handle devices without a baro altimeter

In the sim I can access ambientPressure without an exception but it returns null (without adding the necessary permissions though)... But you say, the foreground access won't work on a real device anyway, that's the important information for me. Btw, adding background + sensor permission approx. halves the available memory for a watchface (ERROR: PRG generated exceeds the memory limit of 'background' applications for device id 'fenix6xpro': 63883 bytes) - is this something I have to accept or can I circumvent this side effect?

Can't I alternatively convert pressure to ambientPressure with the history data?

In the sim, are you simulating data?  Try Activity.Info on a real device with a baro if you have doubts.

Once you add background permission, you want to make sure you use the (:background) annotation where needed, otherwise it will try to load the entire WF when the background runs, inclusing when onAppInstall() or onAppUpdate() are called.

Now that I simulate data it shows a value - thanks. Even without adding additional permissions.

Oh, now I remember that in need to add :background annotations where needed to avoid my whole WF is running in the background - thanks.

So actually you say something different than I though - that real devices with baro allow to access Activity.getActivityInfo().ambientPressure in the foreground? So I just have to add the permissions, make sure my WF is running in foreground and it will work on a real device? Or will it work without the additional permissions in the foreground on a real device (as this is what I see in the sim)?

hi, no permission is need for Activity.getActivityInfo().ambientPressure

when Jim said "Be sure to handle devices without a baro altimeter" I think he means to check if the device has a Baro with 

if(Activity.getActivityInfo() has :ambientPressure){...}

if you use this method, you don't need :Background annotation or permission.

Thanks, that answers all open questions. The unsure phrase for me was "you can only access Sensor data in a background service"

yes the module Sensor. but Activity is available from foreground.

Don't forget to check null statment

thanks for clarifying that. Btw, isn't the null check enough for class variables? I actually though the :has must only be used for functions...

hi, no it is not enough, if you try for exemple Activity.getActivityInfo().ambientPressure on a F45, it will crash since FR45 does not have ABC sensor.

see the API doc, you have lots of exemple of :has 

You want to do the has check too.  Devices like the fr45, fr55, fr245 and venu sq don't have a baro altimeter.