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echo: rberrypi
to: SIMPLE SIMON
from: PANCHO
date: 2021-01-12 16:40:00
subject: Re: Battery Powered Proje

On 12/01/2021 12:14, Simple Simon wrote:
> I am working on a battery powered car and want the Pi to shut down
> automatically if the battery starts to go flat to try to prevent SD card
> corruption. I am a beginner to bash scripts! I will run this via crontab...
>
> #!/bin/bash
> powerstatus=$(vcgencmd get_throttled)
> if [ $powerstatus="throttled=0x1" ]
> then
> echo Under Voltage Detected - Shutting Down
> sudo halt
> else
> echo Voltage Normal
> fi
>
> Obviously it is not working!! Could someone correct and explain for me
> please.

Not being much help, but...

I'm aware of Under Voltage problems from entries in journalctl. It seems
to me that listening for events logged to journalctl would be a pretty
common thing to do. So common that there should be some standard way of
doing it. Some kind of standard Observer pattern on jounalctl. Does
anyone know of one?

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