When designing a battery-powered IoT sensor that must last years on a single battery, why is "duty cycling" combined with careful peripheral power management critical?
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Incorrect.
The correct answer is A) Because the radio and active processing typically consume orders of magnitude more current than deep sleep, maximizing time spent in low-power sleep states between brief active periods dramatically extends battery life
Correct Answer
Because the radio and active processing typically consume orders of magnitude more current than deep sleep, maximizing time spent in low-power sleep states between brief active periods dramatically extends battery life
A device that wakes briefly to sample sensors and transmit, then returns to a microamp-level sleep state for most of its time, can achieve dramatically longer battery life than one that remains active, since active/radio current draw can be 100-1000x higher than sleep current.