Raspberry PI 2 Model B with 3 Antminer U2

philipma1957

legendary

Activity: 4242

Merit: 8515

'The right to privacy matters'

good I am good you got it up and running.

most often you need a decent hub.

jeremyc482

newbie

Activity: 6

Merit: 0

Its amazing how much difference it makes when you get a USB Hub that is 4amps and can handle 3 Antminer U2's

http://i1177.photobucket.com/albums/x350/Jeremycox482/NewUSBHub_zps50zn5hqk.jpg

Looks like I'm running 6Ghs like I'm supposed to Grin

jonnybravo0311

legendary

Activity: 1344

Merit: 1024

Mine at Jonny's Pool

Quote from: jeremyc482 on June 29, 2015, 10:49:40 PM

Here is the command Line I'm using to start CGminer:

I'm not quite sure what the "BMSC" options are as far as what the number signify.

The bmsc-options set the baud rate and timeout value. Always use 115200 as the baud rate. That's standard for USB. The timeout value can be tweaked depending on your preference.

Personally, I don't even use the bmsc-options on my U2s.

philipma1957

legendary

Activity: 4242

Merit: 8515

'The right to privacy matters'

sorry missed your reply.

try these numbers

cgminer.exe --bmsc-options 115200:20 -o your pool -u your worker -p 123 --bmsc-freq 0981

taken from here

https://bitcointalksearch.org/topic/m.7028801

jeremyc482

newbie

Activity: 6

Merit: 0

bump

jeremyc482

newbie

Activity: 6

Merit: 0

Here is the command Line I'm using to start CGminer:

http://i1177.photobucket.com/albums/x350/Jeremycox482/Command_zpsrijtc44a.jpg

I'm not quite sure what the "BMSC" options are as far as what the number signify.

philipma1957

legendary

Activity: 4242

Merit: 8515

'The right to privacy matters'

try downloading cgminer 4.9.2 and run 1 stick.

here is why.
full size link

http://imageshack.com/a/img538/8128/Ke78mb.png

you should look like this: you are missing freq 250

if you do 1 stick and do it with cgminer 4.9.2 I would want to see a freq number like mine.

I know 1 stick would not overload but If you are missing freq that may be the reason.

jeremyc482

newbie

Activity: 6

Merit: 0

Yea thats kind of what I was thinking as well. I just took out the 3rd stick. We will see how it goes.

Edit: Removed 1 of the miners and running at Voltage 1100 got this result:

http://i1177.photobucket.com/albums/x350/Jeremycox482/BitcoinMinerrunning2_zpsjgdnihpj.jpg

So looks like my next purchase is a Powered USB Hub with 5v 4A PSU

jonnybravo0311

legendary

Activity: 1344

Merit: 1024

Mine at Jonny's Pool

Quote from: philipma1957 on June 29, 2015, 11:15:56 AM

A) 5 volts x 2 amps = 10 watts this means you should use 7.5 watts at most
so the hub is too weak

B) use two sticks not 3 and lets us know what happens

C) I asked mods to move this to support

This. The U2 is 2.95W for 2GH/s. Even though your hub claims 5v/2A, chances are exceptionally good that your total constant is 8W at most. It just can't supply the needs of the three sticks.

philipma1957

legendary

Activity: 4242

Merit: 8515

'The right to privacy matters'

Quote from: jeremyc482 on June 29, 2015, 10:13:09 AM

I Switched over to CGminer and seem to get better numbers.

Still not full speed though. Here is a screen shot:

If this is in the wrong forum, Mods please move to the correct one.

A) 5 volts x 2 amps = 10 watts this means you should use 7.5 watts at most
so the hub is too weak

B) use two sticks not 3 and lets us know what happens

C) I asked mods to move this to support

jeremyc482

newbie

Activity: 6

Merit: 0

I Switched over to CGminer and seem to get better numbers.

Still not full speed though. Here is a screen shot:
http://i1177.photobucket.com/albums/x350/Jeremycox482/cgminer6hours_zpseoak2uxp.jpg

If this is in the wrong forum, Mods please move to the correct one.

wh00per

hero member

Activity: 572

Merit: 500

Try set the speed right for the U2. And make sure you have enough power for them. I see a lot of HW errors in those screenshots, so it looks you're trying to overclock them over their limits. At 3W ea, you seem to have enough power.

--set-device antminer:clock=x0981
--set-device antminer:clock=x0881
--set-device antminer:clock=x0781
--set-device antminer:clock=x0A81
--set-device antminer:clock=x0681 (default)

The USB2 speed does not impact hashing. USB2 specs are higher than what bandwith these guys are using, combined.
Try one by one with different speeds. See what they say individually, then pick the slowest speed found where you get 2GH/s from them (the 3rd number) and apply that for all.

jeremyc482

newbie

Activity: 6

Merit: 0

So i need some help with why my 3 antminer u2's are not running full speed.

Here are some screen shots.

Here is the command I am using to run BFGMiner:
http://i1177.photobucket.com/albums/x350/Jeremycox482/BitcoinMinercommandprompt_zpsl9haq4tl.jpg

Here is the actual run screen:
http://i1177.photobucket.com/albums/x350/Jeremycox482/BitcoinMinerruning2ghz_zpsoup39qva.jpg

I am running BFGMiner 5.2.0 and have all 3 U2's on a powers USB2.0 Hub

I have a sneaking suspicion that the issues lies in my USB2.0 hub, It is only a 5volt 2Amp hub.

Screenshot after running 11 minutes:

http://i1177.photobucket.com/albums/x350/Jeremycox482/BitcoinMiner10minrun_zps0bwv9pox.jpg

Any help would be appreciated. FYI I'm still new to this.

Jeremy

Topic: Raspberry PI 2 Model B with 3 Antminer U2 (Read 1378 times)