MobileWill posted this great tutorial on his blog on how to show your pi’s power usage live.
Since the release of the Raspberry Pi, I have had one on my desk powered up. It’s my go to Pi that is always available on the network. It’s mostly running Python stuff and eXtplorer. After all this time, I have always wondered what it really costs to keep a Pi powered up 24/7/365. Then one evening, it dawned on me, I have the USB Tester why not use that? Doh! One thing lead to another and I realized why not log the serial output to the Pi itself.
Using my existing Python code for logging motion to Cosm\Xiviely, in one night, I could easily set it up to log the RPi power usage to the cloud. Pretty freaking sweet, right!? (My wife popped into our home office to check if I was okay as I was using a lot of !!!.)
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