Bangle.js accelerometer sleep modes #1921
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gfwilliams
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…nt requires JS processing (ref #1921)
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After recent changes we're now down to 0.36mA with polling at the default 80ms - so that's roughly 40 days standby. However after left for 1 minute and not moved, Bangle.js drops the interval down to 800ms and power draw drops to roughly 0.15uA (so about 3 months standby!). |
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Right now, Bangle.js power draw is ~0.5mA when idle
However, if we
Bangle.setPollInterval(1000)could get it down to 0.3mA, and turning off the accelerometerBangle.accelWr(0x18,0x0A);gets it down to 0.15.There may be a lower power accelerometer mode that we could use instead of turning it off
So maybe when we don't detect movement for 1 minute (and we have no listeners to acceleration events) we assume the Bangle has been put down, and go into a low power mode? It would drastically increase battery life - initial estimates are almost 3 months if just left in a corner!
We just need to be sure that twist-to-wake still works
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