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posted by janrinok on Thursday August 29 2019, @09:27AM   Printer-friendly
from the hat-tip dept.

An uninterruptible power supply (UPS) isn’t something solely to have hooked up to your desktop PC. Your Raspberry Pi SBC might also benefit from it. Yet the available options aren’t too great, or are too expensive. This leads folk including [Joachim Baumann] to modify cheerfully cheap Chinese UPS HAT[*] boards such as the Geekworm UPS HAT to fix its myriad of issues and missing features.

[...] With [Simon]’s project, a PIC MCU was used to provide a supervisor for the UPS HAT. It also bypasses the HAT’s control over whether the Raspberry Pi gets power or not. The results did however not fit [Joachim]’s needs, so the ATtiny Daemon project was born. This uses some of the fixes [Simon] implemented and adds a daemon that runs on the Raspberry Pi to establish two-way communications between the UPS and OS.

The settings for the UPS are stored also on the HAT, in the MCU’s EEPROM, with the daemon able to update and read it out as needed.

[*] HAT = Hardware Attached on Top. Hat tip to commenters who asked what a HAT was.


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  • (Score: 3, Informative) by takyon on Thursday August 29 2019, @12:24PM (2 children)

    by takyon (881) <reversethis-{gro ... s} {ta} {noykat}> on Thursday August 29 2019, @12:24PM (#887244) Journal

    If 32-bit Raspbian Buster isn't modern enough for you, you could try 64-bit Manjaro Arm [manjaro.org], or Gentoo [raspberrypi.org]. They have their own issues for now, but it's something.

    There's no ETA for USB boot [raspberrypi.org]. It will be done whenever they feel like getting around to it. MicroSD interface speed has been doubled, which is nice.

    Raspberry Pi 4 was originally supposed to come out in 2020, but got moved forward several months as the SoC had unexpectedly good yields or something. So they ran with that. That has probably contributed to the early adopter issues.

    My guess is that 64-bit Raspbian will come out sometime between next year and the release of a Raspberry Pi 5. So maybe 2-3 years from now.

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  • (Score: 0) by Anonymous Coward on Thursday August 29 2019, @04:54PM (1 child)

    by Anonymous Coward on Thursday August 29 2019, @04:54PM (#887360)

    What kind of half ass Gnu/Linux user would use Manjaro arm when there's the ALARM (ArchLinux arm) project? Furthermore, why is Manjaro even targeting Arm when their whole reason for existing is to make *desktop/GUI* ArchLinux simpler for new Gnu/Linux users.