ANTMINER U3 Discussion and Support Thread

[dogie]

It is strange.... after trying the antminer u3 with the cgminer for a few hours. the cgminer always crash or the miner became a zombie.

Anyone know how to get rid of the following errors:
GetResults usb read err:(-1) LIBUSB_ERROR_IO
attempted reset got err:(0) LIBUSB_SUCCESS

The longer the device runs the more it appears until the u3 becomes the zombie

I was getting this before I put it on a powered hub.

Thanks for the idea. After removing the USB hub the problem is gone. now I only need to figure out why the cgminer suddenly stops mining after a while

Have you seen what error it outputs and/or what state it ends up in?

[CCW]

It is strange.... after trying the antminer u3 with the cgminer for a few hours. the cgminer always crash or the miner became a zombie.

Anyone know how to get rid of the following errors:
GetResults usb read err:(-1) LIBUSB_ERROR_IO
attempted reset got err:(0) LIBUSB_SUCCESS

The longer the device runs the more it appears until the u3 becomes the zombie

I was getting this before I put it on a powered hub.

Thanks for the idea. After removing the USB hub the problem is gone. now I only need to figure out why the cgminer suddenly stops mining after a while

Have you seen what error it outputs and/or what state it ends up in?

The problem is that I did not see any output. It looks like a user press the "q" for quitting the cgminer.
After running it a few times, it is running longer. now it already running 3 hours without a break. thanks again for the advices. I was almost in the position to resell the stupid antminer U3

[flyingplows]

where can i buy this antminer u3 cheap, in EU, not get scammed and pay with paypal? i know it won't roi, but just to have fun..

[CCW]

where can i buy this antminer u3 cheap, in EU, not get scammed and pay with paypal? i know it won't roi, but just to have fun..

I got mine recently on eBay. You can get it for around 80 Euro and pay there using paypal

[kcal63]

What would everyone suggest as a good backup power supply to replace the crap one that the Antminer U3 came with? Amazon links if they carry it preferred...

6A one from my rockminer guide.

I really think we are all going to have to switch to ATX computer PSU's with breakout boards for these U3's.
Dogie I bought one of the ones you suggested after my first stock PSU melted. The replacement one you suggested lasted 4 days (at least it didn't melt or catch fire, it just died completely).
I had previously had 3 of those also die while using them for my R-boxes (the 5A version) but I just replaced them as they lasted 2 months before dying on me and I got them cheap ($6 each).

[pak13]

What would everyone suggest as a good backup power supply to replace the crap one that the Antminer U3 came with? Amazon links if they carry it preferred...

6A one from my rockminer guide.

I really think we are all going to have to switch to ATX computer PSU's with breakout boards for these U3's.
Dogie I bought one of the ones you suggested after my first stock PSU melted. The replacement one you suggested lasted 4 days (at least it didn't melt or catch fire, it just died completely).
I had previously had 3 of those also die while using them for my R-boxes (the 5A version) but I just replaced them as they lasted 2 months before dying on me and I got them cheap ($6 each).

You have to remember, most of the time when someone like dogie suggests an item and it contains a hidden link to Amazon or the like, he has an associate tag embedded and receives commission on EVERYTHING in your shopping cart. Not just that one item. So please don't trust those links. Don't click on them. They force your cart to give him commission for the next 24 hours! Trust anyone else who links. Also cross check ratings of those products with other reputable outlets. newegg, overstock etc. Whilst you may not be able to purchase from them, you can at least trust their rating systems over Amazon.

[dogie]

What would everyone suggest as a good backup power supply to replace the crap one that the Antminer U3 came with? Amazon links if they carry it preferred...

6A one from my rockminer guide.

I really think we are all going to have to switch to ATX computer PSU's with breakout boards for these U3's.
Dogie I bought one of the ones you suggested after my first stock PSU melted. The replacement one you suggested lasted 4 days (at least it didn't melt or catch fire, it just died completely).
I had previously had 3 of those also die while using them for my R-boxes (the 5A version) but I just replaced them as they lasted 2 months before dying on me and I got them cheap ($6 each).

They're the same ones I'm using, and none of mine are even warm... Send it back and get another one.

[ImCrazyOne]

Made a simple Bitmain Antminer U3 User Guide. Thank you ckolivas for cgminer that supports U3.
U3 Miners: http://www.ebay.com/itm/131352927860?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1558.l2649
Molex to U3 Cable: http://www.ebay.com/itm/131367677323?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1558.l2649

• Download and Install Drivers http://www.silabs.com/Support%20Documents/Software/CP210x_VCP_Windows.zip
• Plug power brick into AntMiner U3 before plugging power brick into wall.
• Plug power brick into wall
• Connect USB cable from AntMiner U3 to Computer
• Download Zadig: http://zadig.akeo.ie/
• Open Zadig and click "Options > List All Devices" Select CP2102 USB to UART Bridge Controller, and then click "Install Driver". After install is complete, please unplug USB cable and re plug it in after few seconds.
• Download Latest CGminer: http://ck.kolivas.org/apps/cgminer/
• CGminer 4.8.0 will automatically detect U3 miner. Please set pool Username and Password to start mining. Default frequency will be 225Mhz and voltage 0.750v
• To Overclock please run CGminer with the following parameters:
• cgminer -o stratum+tcp://POOL:PORT -u USERNAME -p PASSWORD --au3-freq 225 --au3-volt 750
• To overclock please change the values in --au3-freq 225 and --au3-volt 750
• BITMAIN U3 MANUAL: https://www.bitmaintech.com/files/download/AntMiner-U3%20user%20guide.pdf
  

.
Let your U3 Miner be part of your computer. U3 mines Bitcoin while you use the computer. I will make detailed guide one of these days on how to set up CGwatcher to automatically start CGminer and start mining when you turn on your computer.



https://i.imgur.com/m59OFlEl.jpg



https://i.imgur.com/xp5rmiyl.jpg



https://i.imgur.com/ddX4Ldul.jpg


tips: 1DvubhLGJppzQchZfBvjWtRVnUwa3rp9PB

[CCW]

......

Cool: U3s remain cool and quiet due to its 80mm fan which quietly exhausts air out the side of the case.  

Stable and Accurate: Based on the tried and tested BM1382 chip, the U3 is extremely stable and is able to run 24 hours a day without problems.

Exquisite: The refined design of the U3 allow it to blend on any desk or shelf without standing out.

After running a few days....

Actually I don't think it is quiet. After running it on the table for a few hours, I feel annoyed of the sound from the fan.
And the other point about putting on the desk: I won't recommend it. It is making too much heat on the table.

[Xumpy]

Ok I wanted to share my experience with this miner cause I'm getting a little crazy but I finally think I have it under control.

At first I want to put some complains about the instability of this miner. It can/will guarantee crash after running for a while.

My setup is a raspberry pi with a raspian image. At first I had my miner hooked up without any additional things. This way it crashed every, let us say, 24 hours.

I've build myself a relay that can be controlled with an arduino like board and controlled it to my server (a home pc running linux)
When I have no response in the pool for about 1 minute my server will automatically reset the relay with a power surge of 10 seconds.

I also connected a tinny display to monitor cgminer as it was running (this was my biggest mistake)

My setup worked very well only the board was now resetting every 10 minutes.
This would mean that my miner running at 63GHash was crashing every 8 minutes. This gave ma an average of 43Ghash
After several days of browsing and surfing I found that it was my tiny display that was taking to much current.

If you want to run a miner from a raspberry pi be sure that nothing else is connected to the raspberry pi. Only the miner!!!

Now my setup is working 100% and I finally hope I can enjoy the fun of mining :p

Regards

Xump

ps: The error I recieved if anyone is searching for it was LIBUSB_ERROR_TIMEOUT and I saw my device disappearing in the /var/log/syslog

[thephenix83]

hello, I want a tutorial to install a rasberry to plug in my u3. With the right Linux distribution and cgminer for u3 in this distribution. thank you

[Alesfatalis]

I have an U3 and I'm currently getting an average of 40 GH/s. Is it safe to overclock it? And which parameter do you guys reconmend? 

[dogie]

I have an U3 and I'm currently getting an average of 40 GH/s. Is it safe to overclock it? And which parameter do you guys reconmend? 

You don't need any parameters with the latest cgminer.

[Alesfatalis]

I have an U3 and I'm currently getting an average of 40 GH/s. Is it safe to overclock it? And which parameter do you guys reconmend? 

You don't need any parameters with the latest cgminer.

I don't need parameters to overclock it? I get only 40 GhH/s with cgminer 4.8

What i wanted to know is which is a goog mhz/V combination to overclock it?

[dogie]

I have an U3 and I'm currently getting an average of 40 GH/s. Is it safe to overclock it? And which parameter do you guys reconmend? 

You don't need any parameters with the latest cgminer.

I don't need parameters to overclock it? I get only 40 GhH/s with cgminer 4.8

What i wanted to know is which is a goog mhz/V combination to overclock it?

Screenshot please. You don't need parameters to reach the rating speed (which you're currently not).

[Alesfatalis]

running with

sudo cgminer -o eu-stratum.btcguild.com:3333 -u x -p x --api-listen --api-network

:

average 40-45 GH/s

running with

sudo cgminer -o eu-stratum.btcguild.com:3333 -u x -p x --api-listen --api-network --au3-freq 250 --au3-volt 800

average 53-67 GH/s



I'm running this setup on a raspberry pi with cgminer 4.8. Only the U3 is attached to my pi

[thephenix83]

I apologize @Alesfatalis could you tell me what distribution you put on your raspberry, and if you can give me the procedure to install cgminer above to rotate the u3.
Thank you in advance

For overclock in your cgminer.conf :


^{{
"pools" : [
   {
      "url" : "stratum+tcp://xxxxxxxxxxx", #*******************change this
      "user" : "xxxxxxxxxxxxxxxx", #*************************change this
      "pass" : ""
   }
]
,
"anu-freq" : "225.0",#***************************     change this example : 237.50
"api-description" : "cgminer 4.8.0",
"api-mcast-addr" : "224.0.0.75",
"api-mcast-code" : "FTW",
"api-mcast-des" : "",
"api-mcast-port" : "4028",
"api-port" : "4028",
"api-host" : "0.0.0.0",
"au3-freq" : "225.0", #**********************************change this, example : 237.50
"au3-volt" : "750", #************************************change this, example : 760
"avalon-cutoff" : "60",
"avalon-temp" : "50",
"avalon2-cutoff" : "98",
"avalon2-polling-delay" : "20",
"bflsc-overheat" : "85",
"bitburner-voltage" : "1200",
"bitburner-fury-voltage" : "900",
"bxf-bits" : "54",
"bxf-debug" : "0",
"bxf-temp-target" : "82",
"bxm-bits" : "54",
"cta-load" : "0",
"ps-load" : "0",
"expiry" : "120",
"hfa-hash-clock" : "550",
"hfa-fail-drop" : "10",
"hfa-temp-overheat" : "95",
"hfa-temp-target" : "88",
"hotplug" : "5",
"log" : "5",
"nfu-bits" : "50",
"osm-led-mode" : "4",
"queue" : "1",
"rock-freq" : "270.0",
"scan-time" : "0",
"shares" : "0",
"suggest-diff" : "0"
}}

[Alesfatalis]

I apologize @Alesfatalis could you tell me what distribution you put on your raspberry, and if you can give me the procedure to install cgminer above to rotate the u3.
Thank you in advance

@thephenix83 I'm using raspbian on my pi. To install cgminer you simply do this:

Code:

sudo git clone https://github.com/ckolivas/cgminer.git

cd cgminer

sudo apt-get install build-essential autoconf automake libtool pkg-config \
                             libcurl3-dev libudev-dev

sudo ./autogen.sh

sudo ./configure --enable-icarus

sudo make install

[thephenix83]

 @Alesfatalis thank you very much.

for the code for the clock and volt in the cgminer.conf see this :
https://bitmaintech.com/files/download/AntMiner-U3%20user%20guide.pdf

[Alesfatalis]

Still having problems with the miner it stops mining ~24h. I'm getting this: