A sensor reporting every 10 seconds generates 8,640 readings per day but has a battery life of only 2 to 4 weeks. The same sensor configured to report every 15 minutes generates 96 readings per day with a battery life of 3 to 5 years. What mechanism explains this dramatic difference in battery life?

Question

Accepted Answer

The dominant power consumer in a wireless sensor is the radio transmission, not the measurement itself; reducing transmission frequency from 8,640 to 96 times per day eliminates the vast majority of radio energy consumption

Answer

The 15-minute interval sensor uses a different, more efficient wireless protocol than the 10-second interval sensor

Answer

Longer reporting intervals allow the sensor to enter a lower-voltage operating mode that draws less current from the battery

Answer

The sensor’s measurement circuitry consumes most of the power, and fewer measurements extend battery life proportionally

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A sensor reporting every 10 seconds generates 8,640 readings per day but has a b...

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