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MarkBryanMilligan / LanternPowerMonitor

The Lantern Power Monitor is a Raspberry Pi service, Java Web Service, and Android application that allow you to monitor every electrical breaker in your house, regardless of how many panels or breakers you have.
GNU General Public License v3.0
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Create Raspberry Pi 4 image #3

Closed MarkBryanMilligan closed 3 years ago

MarkBryanMilligan commented 3 years ago

The current image only seems to work on a Pi 3 out of the box. It can be made to work on the Pi 4 but you need to tweak some stuff on the command line. It'd be easier for Pi 4 users to have an image that works without any modification.

rharter commented 3 years ago

Curious if there's any reason this can't work on a Zero. The Zero W has a 40 pin header (no stock connector), and seems comparably speced to the 3A. And...it's $10. Event better, the original Zero 1.3 is $5 at Adafruit, which is really attractive for something like this, which doesn't need USB hubs and HDMI ports.

MarkBryanMilligan commented 3 years ago

I kind of expect it to be CPU limited. On a pi 3 A+ (or B+) with the quad core Cortex-A53 1.4 GHz, it gets about 300 samples per cycle. On a 4 b+ with its quad core Cortex-A72 1.5 GHz, it gets about 400 samples per cycle. A zero only has a single core and I keep one core pegged at 100% cpu 24/7 sampling the ADCs. I thread off calculating the power and posting it to the server since there are other cores available for that work. I have a feeling on a single core machine running java, the sampling would get all jacked up as garbage collection occurs during the computation and http call phase of each second.

MarkBryanMilligan commented 3 years ago

I made a new image that works on both pi 3s and pi 4s. I also zipped it this time to make the download smaller. The new image is here

Closing this issue.