Hi everyone,

I'm posting here cause I think my problem is related to cgminer.
Indeed, I bought an old antminer U3 for bitcoin mining (just as a hobby). I had followed all the procedures with the CP210x driver and Zadig. I had disable all the firewall and antivirus/antimalware software.
Windows can detect the device with the right driver.

But cg miner keep displaying "USB init, open device failed, err -12".

I'm joining to this post some screenshots.

I really think the problem is coming from cgminer and the device.

I'm using windows 10, 64bit. I tried with cgminer 4.10, 4.9 and 4.8.
The command line for the batch is simple :

cgminer.exe -o stratum+tcp://stratum.slushpool.com:3333 -u hurtol.worker1 -p Password --au3-volt 810 --au3-freq 250
pause

And the screenshot :
http://hpics.li/3217890

http://hpics.li/f3a91b9

http://hpics.li/b86c2ce

I'm just out of solutin after das of research...

Thank you very much for your help !

Hello,


I'm kind of a noob   beginner in the world of Asic miner. I bought an Antminer U3 but i can't make it run.

I follow several tutorial with the installation of the CP210X driver, the Zadig procedure and the CGminer 4.9 batch configuration.

I'm using this config :

cgminer.exe -o stratum+tcp://stratum.slushpool.com:3333 -u hurtol.worker1 -p Password --au3-volt 810 --au3-freq 250
pause


But after trying lot of time, included test on bfgminer, 4.8cgminer and 4.10 cgminer, it's not running.

The fan seems to be ok and there is the red led next to the usb port. Windows seems to detect fin the device. But cgminer always displayes "no device detected" and open device failed err -12.

I'm using windows 10 in 64 bit version.

I'm joining screenshot :

CGminer display :

http://hpics.li/3217890

http://hpics.li/f3a91b9

device drivers:

http://hpics.li/b86c2ce


Thank you very much for your help