UST
February 17, 2015, 4:28pm
1
I realize the thread I'm continuing is over 244days old but I was looking for concise information on current consumption and the sleep modes! This had everything
@BDub is your chart below still usable in calculating and testing battery options, for when in deep sleep mode? or even while not in deep sleep mode? Have the numbers, Wake Current = 0.145 A and Sleep Current = 0.000187 A, changed?
Here's a little excel work showing how long the battery should last using my measured currents. I adjusted for your average uptime (looks to be about 20 seconds, i.e. it was taking a while to connect to wifi probably) and I also tweaked the battery capacity down to 450mA so that the time of the first test would match, about 12 hours. Then if you look at the rest of the tests, they match up pretty close. I wouldn't be surprised if your 600mA battery wasn't being fully charged, and had ~450mA of capacity
http://i.imgur.com/FoDoBb9.png
Average current calculation:http://i.imgur.com/yMf01iN.png
Runtime calculation:http://i.imgur.com/tQhkgX2.png
What's interesting is your 900 second test is kind of the outlier in the bunch. 600 and 1800 seem to match my chart pretty close.
BTW: the Core did sleep fully for 30 minutes (1800 seconds) and did not wake up early or anything.
So now if we keep doubling our sleep time, we're sure to find the point at which there is a true diminishing return.
http://i.imgur.com/ChsBwkg.png
Aha... it's when the Wake Time and Wake Current is so diluted by the sheer amount of time that the core is Sleeping. The Sleep Current dominates and you can't do any better than Battery Capacity / Sleep Current = Runtime Hours.
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BDub
February 17, 2015, 5:36pm
2
As far as I know, those numbers are still valid.
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@BDub what an awesome table! Now sure how I missed it when it was first published.
