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1  Bitcoin / Hardware / Re: GekkoScience 2Pac/Compac BM1384 Stickminer Official Support Thread on: July 12, 2019, 02:25:43 PM
Hello,

I try my first steps on this mining topic and bought a raspberry pi 3b+ with 2 GekkoScience 2Pac BM1384 Asics.

I got all to run, but one of the 2Pacs went offline after few seconds. The measured vcore then goes to 0V and CGminer write, that this Asic went offline found 0 chips.
I found also a topic that vcore is to high so I set it to 1,3V like the other one which is working perfectly.

But all I try, the second one comes not or goes offline in short time.

I tried also with this 2Pac alone, same result. I tried also this stick directly on raspberry usb same result. comes few seconds and goes offline.

Could it be that the Asic is damaged? Its a one from amazon and the stick came with 1,5V vcore setting???

Hello Sh4d0wC457,
Your post is a little unclear, but are you running the two 2Pacs straight off the ports on the raspberry pi 3b+?
Have you tried running the miners from a powered usb hub?
2  Bitcoin / Hardware / Re: GekkoScience 2Pac BM1384 Stickminer Official Support Thread on: May 03, 2018, 11:45:43 AM
when i woke up this morning the pi had not crashed. so adding slub_debug=FP has definitely improved things. but.... out of the three sticks i left in last night one of them was reporting OFF when i woke up.

as yet i can seem to get it restarted. ive tried using the miner options like, E enable, R reset etc etc

Hello Zac123, Glad to hear that you got it mostly wrking.

You can test to see if it is a faulty usb port or a finicky stick by swapping the order of the sticks. Powered usb hubs vary a lot in quality and you may feel excess heat from the hub itself. If it happens to be the same stick that keeps turning off, some people would say to increase the voltage by turning the pot. @200 MHz you should be under your max current draw, but that depends if you were already messing around with the pot to begin with. The counterintuitive thing would be to actually lower the voltage in case you have a slightly power hungry stick that was drawing too much current through the usb port, and caused it to lose communication to the Raspberry pi.

Restarting the pi should put it back to working order, from an off state, for a while if you didn't address anything written above. And that could be automated using your crontab schedule. *at least mine does. In conjunction, although not ideal, I have my hub plugged into a smart plug that i can control from anywhere, and set up a schedule on that. But this is mainly used in case the pi loses its wifi signal, (yet again not ideal), or the pi locks up. I set my crontab schedule to safely shut down the pi slightly before the smart plug shuts it all down and starts everything back up once a week.
3  Bitcoin / Hardware / Re: GekkoScience 2Pac BM1384 Stickminer Official Support Thread on: April 29, 2018, 07:14:16 PM
hello again everybody,

i've now decided to move my stick onto a rasp pi.

ive setup a cron job so that whenever the pi is rebooted a script called runMiner.sh is run. in my runMiner.sh file i have this:


Code:
#!/bin/bash

sudo /home/pi/git/vthoang/cgminer/cgminer -o stratum+tcp://eu.stratum.slushpool.com:3333 -u zbw123.worker1 -p x --gekko-2pac-freq 200

 i have also done this so that the terminal starts when the pi reboots


nano ~/.config/lxsession/LXDE-pi/autostart

Added this line to the end of the file:

@lxterminal

ok so i'm sure you guys are falling off your seat with laughter but basically all that happens is the terminal opens up but the miner doesnt start.

somehow i need to get the command into the terminal.

thanks for any help
zac


Hello zac123, I think you are pretty close. You need to specify the path to the runMiner.sh after the @lxterminal command; on the same line.

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