Re: HASHRA CONTROLA on Raspberry Pi for Gridseed

i know you said you have re-imaged multiple times, but have you used the same image file each time? Maybe thats the issue. Try re-downloading the file and go from there if you havnt already.

Thanks AmDD I will try that. I am also buying some class 10 Sandisk 8gb cards to see if maybe I got a bad batch of NOOBS cards shipped with the Pi's...always a possibility. Not much more I can try if that doesn't do the trick.

Anyone else having this issue with the Controla software or can I pretty safely say that I am having some type of hardware issue? What is everyone using for USB hubs for 20 miners?

It's unlikely that hub problems are crashing the pi all they will do is drop the gridseeds that said I am using the Etekcity® 10 Port USB 2.0 Hub Powered External with 3A Power though it may be called something else in your country.
http://www.amazon.co.uk/gp/product/B00ELPSEVW/ref=oh_details_o01_s00_i00?ie=UTF8&psc=1

Raspberry Pi crashes are down to a faulty/damaged SD card image or the pi not getting enough stable power

This sounds like good reasoning. Is it possible that the cards themselves are faulty? Or just the image? I have re-imaged the cards many times so if the image keeps becoming faulty the cause of that would be bad SD cards maybe? Or perhaps the fact that the Pi is crashing and hard booting, I suppose this might corrupt the SD card. But that still wouldn't explain why the Pi's are crashing. And also when I say the Pi's are 'crashing' all I mean is that they are locking up, the hashra interface GUI is inaccessible and mining has stopped. They dont actually shut off.