[Feature Suggestion] powerSave in settings

[espruino-discuss2]

Posted at 2022-05-16 by d3nd3-o0

Since the powerSave feature reduces the polling Interval for accelerometer etc. when its detected that the device is stationary, but not when its moving. I was wondering if its good idea to put this in the settings app: powersave = auto/on/off.
Three modes.
auto = when stationary
on = polling interval 800ms always
off = polling interval 80ms always

The only downside I see is that the user might not be aware of how it makes the accelerometer less reliable/accurate. So would have to make that clear, or put a warning when changing that setting? Or could name the setting something strange like "Accelerometer Power". Then its clear that when its off, you can't also rely on using the accelerometer.

I personally do not use the accelerometer and so I put a .boot.js file with pollingInterval 800 to increase battery usage/life.

Thoughts?

[espruino-discuss2]

Posted at 2022-05-18 by @gfwilliams

It could be added, but the polling loop does do other things as well like checking buttons long-presses so it could impact how fast Bangle.js seems, as well as breaking step counting, movement recording and so on.

I just wonder if it's really worth it? Have you done any tests?

The power usage is between 0.3mA (high) and 0.15mA (low rate). Even at 0.3mA that's 1 month battery life on Bangle.js 2, so in reality the power draw from other apps will dwarf what you save by tweaking the accelerometer mode.

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Posted at 2022-05-18 by d3nd3-o0

Have you done any tests?

Unfortunately, not.