What is the behaviour of the Raspberry Shake (/PI) in situations where (solar) power is scarce and may brown-out? - Is a proper restart always expectable?
Also, are there any resources that are running by default, which one could switch off for reducing power consumption, especially when not connected to a network?
Hi @IceShake, by no means do I have the most experience among the community in this area, but I will give you a couple pieces of information that might help.
I suggest reading this discussion regarding the Raspberry Pi’s behavior during brownout conditions:
https://www.raspberrypi.org/forums/viewtopic.php?t=102740
I also suggest becoming familiar with the Solar Recommendations page of the manual if you have not already:
https://manual.raspberryshake.org/solar.html
If the Pi’s power needs are met and it can read the OS from either an SD card or an external USB drive, then yes it should start just fine. A properly-configured low voltage disconnect (LVD) solar charge controller should eliminate undervoltage conditions, which should help manage the power needs. I think some charge controllers have a USB interface, which means you could monitor the voltage with a small script on the Shake and shut down safely prior to the controller activates its LVD mechanism. An industrial-grade SD card or external USB thumb drive will help avoid data corruption, which becomes far more likely when the device is not shut down properly.
Yes I believe there are. @ivor will be able to give you a proper answer, however.
Ian
I got tired of daily power cycling my raspberry pi shake module because of power line spikes that corrupted the SD card. Re-flashed SD card.
My fix was to use a commercial grade linear power supply ( SOLA GLD-01-065 5V 6A) that
had 5 millivolts of ac ripple. Switching power supplies are 20mv to 50mv ripple/noise.
I could have used a 5V 3 amp linear power supply. Made by Sola, Power One, ACDC, Condor, Lambda.
Power line filter is an ISLATROL IC+115 (filter stops most transients greater than 2 volts above line voltage ), UPS 200VA and then the linear power supply.
Everything purchased on EBAY.
Small price to pay since replacement shake modules are expensive.
Now I’m bored waiting for something to happen on some days.
Five years of operation 24hours a day is all I expect in this pampered environment.
Sealed the RPI module and shake adapter with lacquer spray due to corrosion problems from high humidity and sea salt in the air.
Hope this was helpful.
Hi Ian and @IceShake:
Buenos días.
There is nothing more that we know of that can be done to save power beyond what is mentioned here: https://manual.raspberryshake.org/power.html
But if you discover anything, please share and we will update the manual!
Yours, branden
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