4/10/2023 4 Comments Octoprint pi zeroAdd the line to /etc/rc.local to disable HDMI on boot. If you're running a headless Raspberry Pi, there's no need to power the display circuitry, and you can save a little power by running /usr/bin/tvservice -o ( -p to re-enable). I decided to spend some time testing these theoretical power-saving techniques on my Pi Zero, and here are some of the tips I've come up with (note that these techniques work with any Pi, not just the Zero): Technique Yesterday my post comparing the Raspberry Pi Zero's power consumption to other Pis hit the Hacker News front page, and commenters there offered a few suggestions that could be used to reduce the power draw even further, including disabling HDMI, changing the overclock settings, and futzing with the lone ACT LED. Update : With the new Pi Zero 2 W, you can also disable some of the CPU cores to reduce power consumption for a heavily-utilized Pi if it doesn't need all the CPU cores running. ![]() Seems the Pi Zero is only incrementally better than the A+-still excellent news, but not nearly as amazing as I originally thought :( I've updated the numbers in the post below to reflect this change. This seems to be more in line with the results others were measuring with much more expensive/accurate meters in the Raspberry Pi forums: Raspberry Pi Zero power consumption. ![]() Update : I bought a PowerJive USB power meter and re-tested everything, and came up with ~80 mA instead of the ~30 mA reported by the Charger Doctor that I was using prior.
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