Sleep mode on Simulator versus Device

Hello,

I am developing an analog watch face. I want to only display the hour and minute hands on low power mode.

I use the onEnter/ExitSleep methods to track the state as found in the sample as well as in several threads here.

However, on the simulator, when I check Low Power Mode, it works whereas, on the Device (Venu 2 plus), the screen goes black after 10 seconds.

What am I doing wrong ?

PS: I created and empty (my-face).txt file in APPS/LOGS but nothing appears in it (I hoped some error logs would be there).

PPS: What is the difference between Low Power Mode and Sleep Mode on the simulator?

Thanks !

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0 jim_m_58 over 4 years ago

AMOLED devices have additional restrictions, where not more than 10% of the pixels can be on and for some, no pixel can be on for more than 3 minutes (these are to prevent burnin). You also need to have "always on" selected for the timeout for the display on the real watch. I suspect you have too many pixels on in low power.

+1 guigui64 over 4 years ago

My bad, I just realized that I was in my configured "sleeping hours"... Outside of my sleeping hours, it just works !

0 guigui64 over 4 years ago in reply to jim_m_58

Thanks for the quick answer ! I found the origin of my (stupid) problem (see accepted answer).

Also, I guess the 10% part is also checked by the simulator. And yes, I knew about the always on settings.

0 jim_m_58 over 4 years ago in reply to guigui64

Your "sleeping hours" has nothing to do with onEnterSleep()/onExitSleep() in a watch face. It's NOT the same sleep.

In the sim, make sure you run more than a full minute and use File> "View Screen Heat Map" while in low power mode.

0 guigui64 over 4 years ago in reply to jim_m_58

I know that. Maybe I need to clarify:

- I tested my watch face while being connected to my computer => I guess that, when charging, the AOD (always on display) is disabled bu default

- When I unplugged it, it still didn't show the AOD because I was in my sleeping hours and the watch thought I was sleeping (in this case, it never shows the AOD)

- When I changed my sleeping hours settings, I could finally test my face in a real case situation => it worked

0 jim_m_58 over 4 years ago in reply to guigui64

for AOD you need to be wearing the watch. It goes black when you take it off to save the screen and battery

0 guigui64 over 4 years ago in reply to jim_m_58

Good to know, thanks !