3 ms·
It doesn't even need to wake up over and over if you set up the LDR to trigger an interrupt to wake it up. Just put it to sleep indefinitely, and set it to wak
by brokenmachine 5y ago
It doesn't even need to wake up over and over if you set up the LDR to trigger an interrupt to wake it up.
Just put it to sleep indefinitely, and set it to wake from a pin change interrupt.
You'd need an RTC as well so it can log the time though.
For example a STM32L031 uses 0.5uA in sleep mode.