nrf52832: Modifying the prescaler value to save battery life

RE: nrf52832: Modifying the prescaler value to save battery life

John — Fri, 04 Aug 2017 12:07:44 GMT

Good points

RE: nrf52832: Modifying the prescaler value to save battery life

Roger Clark — Thu, 03 Aug 2017 23:45:24 GMT

The OP has not said what advertising interval or power level etc they are using.

Changing the advertising interval would most likely have a much bigger impact on total power consumption.

I've also heard of solutions that use an external device to do the lower power timing.

e.g put the MCU into its deepest sleep mode when its not being used and let the external (ultra low power) timer device, wake it via interrupt.

But the OP would need to model their individual set of circumstances to see what would give the minimal power usage.

RE: nrf52832: Modifying the prescaler value to save battery life

John — Thu, 03 Aug 2017 20:06:07 GMT

I don't imagine that there is a lot of power savings to be gained by the prescaler unless it changes how often you come out of IDLE mode. Once the RTC peripheral is on I think it would burn about the same amount of power regardless of the prescaler. The data sheet indicates that it's typical power consumption is 0.1uA so there isn't a lot to gain there.