hello , thanks for your article ! I have a problem : In Zadig , i have’nt CP2102 USB but only “ST32 Virtual COM Port” have you a idea ?

Do I need Zadig to run cgminer 3.7.2 for GRIDSEED 3355 5 chip miners even though I already have STMelectronics Virtual Comm Port drivers installed and have been using successfully with cpuminer.
By the way, no need for cpuminerOC….the GS5s hate it! ;(
Tanks!
Wolfey2014

If your unit has a STM32 Virtual COM Port (or something else) instead of CP2102 USB to UART Bridge Controller you can try replacing that driver by following the same procedure, it might also work, though unfortunately we do not have a unit with the newer chip to test ourselves. If it does not work, just uninstall the driver and the device should install back the original driver and work again with the cpuminer.

guyver, no idea what the problem could be t the moment, unfortunately we have only one Gridseed ASIC device, so we cannot currently test with more than one… so far no issues with one miner though, running for more than 12 hours already.

Tried updating the driver STM32 Virtual COM Port. With the Zadig driver. Still a no go. Cgminer reports no device found. Already reverted back to the other Cgminer. Also if you update the driver and run into a problem.Go into hardware and remove – reinstall the STM32 Virtual COM Port driver.

“you need to install a WinUSB driver on top of the standard installed USB to COM driver”

Where does one download this “standard installed USB to COM driver”? Or is it already built into Windows?

And is Zadig the “WinUSB driver”?

For all the people having an issue with this version of CGMiner recognizing the miners, try the following steps:

1. unplug the USB hub (or miner) from the PC
2. run CGMiner
3. wait until it loads
4. plug in the USB hub with all the miners attached

This should recognize all that are connected to that hub.
You may also have to change the –hotplug 1 to –hotplug 5 in the CGMiner batch file/command line.

Still can’t get 20 grid seeds to work. Has anyone got 20 working? If so what did you do?

Thanks Bob, as I saw the GUI hanging when I tried 20 so assumed it was not working. I did not check if I was getting the correct speed. I will try again and use CGWatcher to monitor it.

Nevermind, its working now. Win8 already had a virtual com port… I just fired up Zadig, clicked “options -> list all devices” then chose the virtual com port and hit the install driver button. Mining has begun. :)

All was fine until I rebooted today for “Windows Updates” … now cannot find the miner. :(

Rowan, read my comment a couple posts up. It would have solved your problem.

gaspoweredcat, you can now also try with bfgminer for windows, it does not require the replacement of the virtual COM port drivers with WinUSB like cgminer does: https://cryptomining-blog.com/1396-download-bfgminer-3-10-0-for-windows-scrypt-mining-on-gridseed-5-chip-asics/

The procedure for using bfgminer is not the same as the one described above for cgminer, you don’t need to use the WinUSB driver with bfgminer like you need with cgminer! The OCL devices are the video cards, we have configured the bfgminer to only detect and activate mining on the Gridseed ASICs by default.

TC, just uninstall the modified driver for the mouse and keyboard from the Windows Device Manager and scan for hardware changes. If it installs the modified driver again just select to update it and choose to update the driver right clicking on it and then select to manually choose and pick from the list of drivers on your computer. You should see the original driver listed there.

ST32 Virtual COM Port does work In Zadig for the gridseed

As a pc an uses more than 2KW per day using the gridseed on anything other than a raspberry pi using the hashra controla software seems like banging your head into a wall when the door is just next to you.

I have 43 units and 5 usb hubs, whats the easiest way to connect them and only use a single controller if possible?

You would probably have to use a PC as so many miners will most likely be too much for a single Raspberry Pi, though with two or three RPi used as controllers it might also work out well.

Or can i get a separate hub and plug all the other hubs that hold the gridseeds into it?

Dave R, you can just get a smaller USB hub that you connect the bigger hubs into and have that one connected to the PC. It could help to have a USB hub with a on/off button to make it easier. Then first you run the cgminer and then turn on the USB Hub or connect t to the PC (make sure the hotplug command line option is set to 5) and cgminer should detect and show all miners. If you are still having trouble you might want to also try bfgminer, though for it to work you will need to revert back to the standard USB to COM drivers first.

Your problem is going to be, that cgminer will only run 15 gridseeds at once..try adding any more and it will lock up!..
Solution: You can run several cgminers side by side on one computer by changing the name of each folder, then fire up one at a time. I used a different miner for each one.
They will work fine with each other & it just takes a but of testing to get them even with your miners, otherwise one will take up the whole 15 and leave the rest for the next screen.
I have been running this with 20 miners.

Gridseed: Solo is not mining!
cgminer write: Network diff set to 0.

Downloaded what you said here and it IMMEDIATELY detected the Gridseed after messing with it for all day.