On Mon, 02 Dec 2019 15:34:16 +0100 Per Jessen <per@computer.org> wrote:
Carlos E. R. wrote:
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On 02/12/2019 13.36, Per Jessen wrote:
Carlos E. R. wrote:
On 02/12/2019 12.54, Per Jessen wrote:
Carlos E.R. wrote:
On 02/12/2019 12.12, Per Jessen wrote: > Carlos E. R. wrote:
>> On 02/12/2019 09.17, Per Jessen wrote: >>> My systems need to write something every minute. >>> They're generally monitoring various sensors. >> >> Can't the writing be delayed? > > Perhaps, but at the risk of losing the data.
Linux never crashes :-p
Of course not :-) , but the power might disappear.
Bring an UPS line to it from somewhere else?
It totally ruins the idea of a neat and tiny device being hidden away in a corner. The ARM board is only 50x50, the power supply is already bigger than the board :-)
I know, but you have to connect it to the mains. Bring a mains line from the house that comes from an UPS :-)
Mains wiring is way too much effort - for each and every system. I have three sofar, one or two in planning. Nonono.
Or... have a huge capacitor, and on power failure issue an emergency write everything order, then halt.
Yes, I have actually wondered about that, using a supercap. I think I'll stick to writing to the SD card.
Tsk tsk... I was looking forward to the photos :-D
It's an entirely feasible solution, you can find them on-line, https://www.bicker.de/index.php/eng/Company/News/DC-UPS-with-SuperCaps-for-u...
Ouch! €265 I'm surprised I haven't found 3.3V or 5V USP supplies intended to keep IoT devices working through power cuts. In particular, security cameras either seem to be just mains or just battery. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org