What about possible SD data corruption?

[Jerry, W5BFF]

I’ve done quite a few hard shutdowns on my RPi with no consequence once I got the properly rated SD card. The only issues I’ve had was using the lower-rated SD cards, and it didn’t matter if I shut the Pi down properly or not.

With a production repeater, it’s not that difficult or expensive to build in some power redundancy… I know a Pi can run a good while on AA batteries!

[Aaron, N3MBH]

A small UPS would be simple also to condition the power as well as provide backup power to other accessories. Some have USB connections on it. I am sure there is probably a Linux library out that that could interface with a UPS if desired and issue a safe shutdown when the UPS is reporting the end of it’s battery.

73,
Aaron – N3MBH / WRFV871

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[Mauro, IW3ROW]

This is another good idea, see what I’ve found with a quick google search on this topic:
http://raspi-ups.appspot.com/en/index.jsp

This project seems to be perfect for this use and it’s chaep.

Thanks W5BFF for reporting your experience, I’ve executed also a number of hard shut downs with no issues, but of course before to put the repeater in production I would like to have some backup.

Thanks! Mauro IW3ROW

[Aaron, N3MBH]

That seems to be a viable option too. As opposed to a UPS this will only provide power buffering to the PI where a UPS can support other devices if you need calls for that.

73,
Aaron – N3MBH / WRFV871

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