Diagnose and minimize the power draw of an ESP32-based sensor node so it can run for months or years on a small battery, covering deep sleep, peripheral shutdown, wake sources, and duty-cycle design.
## CONTEXT The ESP32 is a powerful but power-hungry microcontroller, drawing well over 100 milliamps with WiFi active while pulling only a few microamps in deep sleep. The gap between a node that lasts a week and one that lasts two years on the same coin cell or 18650 cell is almost entirely a matter of how…
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