I have Adafruit Huzzah32 project under development with a lipo battery connected. It wakes every 10 minutes, performs an action, then enters deep sleep mode.
This morning it has ceased to awaken from deep sleep. The battery voltage is reading 65%.
What might stop it from waking from deep sleep all of a sudden?
the power to wake the ESP32 is no longer available.
How much battery power is required to wake it?
The solution is to not let the battery voltage drop that far, before recharging.
That avoids destroying the LiPo battery by overdischarge, as well.
What does that mean, voltage-wise?
65% of 4.2 is about 2.7v, which is “dead” for a lipo.
65% meaning 65% between “full” (4.2V) and “empty” (about 3V) could still be below the 3.3V that the esp32 wants…
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