I have a really power-sensitive system, which only needs to be active a few times a day, (to call the server and report some stuff), and else only wake up on a specific set of timers.
The rest of the time, it should be using as close to 0 amps as possible.
I have seen some timer gymnastics, but none to wake up the system from off.
And I have seen some interrupt pins used, but none to wake it up from off.
Should I have a microduiono or some other small board with limited capabilites to control the relay to the mother-board and just turn it on, or do you have more elegant solutions?
[quote=“njbuch”]Looking at this, it seems it would be a really cool addition to a new power module with some low power features, does that make sense?
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It would be much better if the Low Power modes worked properly in the software. Currently I think the CPU is still running at full speed even when no threads are running. The chip has a really simple CPU Clock rate divider register specifically for this sort of this thing.
The system should check the state of a few sensors based on a timer, alert via SMS in case of problems, and then turn off again. We are talking maybe 2 times per day. And it will be on for about 1-5 minutes.
There is an alarm on one of sensors, that should trigger in immediate startup, where an important SMS should be sent.
I would prefer to use the Cerberus, for the prototype it might be a Spider or Cobra II board in case that changes anything…