Mining on Rapberry PI | Bitcointalksearch.org

bestcoin_59

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Quote from: Jake36 on December 07, 2015, 05:10:43 PM

Quote from: bestcoin_59 on December 07, 2015, 03:26:55 PM

Hi Jake36

Quote from: Jake36 on December 07, 2015, 01:06:33 PM

If I remember right, WU = work utility or something like that.

Ok, thanks for the clue. A google research with "cgminer work utility" gave the me the following:
https://bitcointalksearch.org/topic/cgminer-and-wu-work-utility-424095

Quote from: Jake36 on December 07, 2015, 01:06:33 PM

Give the pot a little bit more of a turn on the low one and see if WU increases.

I tried. However i didn't notice any real change. Does it mean that the miner is faulty?

Quote from: Jake36 on December 07, 2015, 01:06:33 PM

And why the Pi's have trouble with a lot of hub's, is some of the hub's back feed power to the Pi's. So you got the Pi trying to send power to the hub, the hub trying to send power to the Pi on the same cable and the hub usually wins and causes problems with the Pi.

In my case both the Pi and the Hub have their own PSU.

Quote from: Jake36 on December 07, 2015, 01:06:33 PM

The 1 usb 3.0 hub that I've found to work with the Pi 2 B and compac's, is the Superbpag 7 port 70W 2Amp per port hub. I only have the Pi 2 B, so don't know if it works with any other Pi models or not.[/color]

Thanks for the information Wink

No, it's probably just not enough power from the hub to do 3 @ freq 210 or the green. Or could be like one of my sticks, set them all by eye with the flat at about 10-11 o'clock with the usb pointing down at 6 o'clock. One stick would do crazy HW error rates no matter what, turned the pot 180 degrees (4-5 o'clock) and it runs with 0 HW errors.

A lot of hubs don't have the data (port between pc/Pi to hub for data) port isolated from the power for the regular ports. So they are also sending power back to the Pi's along with data on the syncing cable
IE: power from the Pi port going out ---><--- power from the hub port going out, so power coming from two sources on same the cable.

Hi Jake36,

Thanks for your message. It turns out that the "WU" is still low even when i plug the weird compac directly on the Pi (without using the HUB). Moreover the HW errors are very rare. I mean how is it possible to have a low "WU" with very few HW errors?

Cheers,

Jeff.

Jake36

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Activity: 331

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Quote from: bestcoin_59 on December 07, 2015, 03:26:55 PM

Hi Jake36

Quote from: Jake36 on December 07, 2015, 01:06:33 PM

If I remember right, WU = work utility or something like that.

Ok, thanks for the clue. A google research with "cgminer work utility" gave the me the following:
https://bitcointalksearch.org/topic/cgminer-and-wu-work-utility-424095

Quote from: Jake36 on December 07, 2015, 01:06:33 PM

Give the pot a little bit more of a turn on the low one and see if WU increases.

I tried. However i didn't notice any real change. Does it mean that the miner is faulty?

Quote from: Jake36 on December 07, 2015, 01:06:33 PM

And why the Pi's have trouble with a lot of hub's, is some of the hub's back feed power to the Pi's. So you got the Pi trying to send power to the hub, the hub trying to send power to the Pi on the same cable and the hub usually wins and causes problems with the Pi.

In my case both the Pi and the Hub have their own PSU.

Quote from: Jake36 on December 07, 2015, 01:06:33 PM

The 1 usb 3.0 hub that I've found to work with the Pi 2 B and compac's, is the Superbpag 7 port 70W 2Amp per port hub. I only have the Pi 2 B, so don't know if it works with any other Pi models or not.[/color]

Thanks for the information Wink

No, it's probably just not enough power from the hub to do 3 @ freq 210 or the green. Or could be like one of my sticks, set them all by eye with the flat at about 10-11 o'clock with the usb pointing down at 6 o'clock. One stick would do crazy HW error rates no matter what, turned the pot 180 degrees (4-5 o'clock) and it runs with 0 HW errors.

A lot of hubs don't have the data (port between pc/Pi to hub for data) port isolated from the power for the regular ports. So they are also sending power back to the Pi's along with data on the syncing cable
IE: power from the Pi port going out ---><--- power from the hub port going out, so power coming from two sources on same the cable.

bestcoin_59

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Activity: 305

Merit: 16

Hi Biodom,

Quote from: Biodom on December 07, 2015, 02:08:55 PM

Superbpag also works on pi zero using a nonpowered usb 2.0 bridge (i used cheap 4 port Sabrent) in between.

Lucky you

It looks as if you managed to get a Pi Zero. Even in UK it's nearly impossible to get a copy of the MagPi. Last week,
while i was looking through severals computer science magazines in my local newsagent here in France, no less than 3 people asked me (although i don't work for the store...), if i knew a way to get a Pi Zero Grin

bestcoin_59

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Quote from: ManualMiner on December 07, 2015, 01:11:04 PM

You won't make anything.
It is not worth mining with a raspberry Pi,
Unless you are willing to use a 10000 block erupters.

I'm aware i won't get rich.

Quote from: ManualMiner on December 07, 2015, 01:11:04 PM

Just buy an ASIC man.

I my opinion, it's not as simple as that. First, the lattest Asics are quite expensive and the electricity
consumption of such devices are much higher. My goal, ATM, is to understand better BTC mining...

In fact i really wonder, whatever the devices people are mining with, if it's still possible to make profits...
I mean, even a Antminer S7 won't probably be sufficient in one or two years. Does anyone share the same
opinion?

Cheers,

Jeff.

bestcoin_59

member

Activity: 305

Merit: 16

Hi Jake36

Quote from: Jake36 on December 07, 2015, 01:06:33 PM

If I remember right, WU = work utility or something like that.

Ok, thanks for the clue. A google research with "cgminer work utility" gave the me the following:
https://bitcointalksearch.org/topic/cgminer-and-wu-work-utility-424095

Quote from: Jake36 on December 07, 2015, 01:06:33 PM

Give the pot a little bit more of a turn on the low one and see if WU increases.

I tried. However i didn't notice any real change. Does it mean that the miner is faulty?

Quote from: Jake36 on December 07, 2015, 01:06:33 PM

And why the Pi's have trouble with a lot of hub's, is some of the hub's back feed power to the Pi's. So you got the Pi trying to send power to the hub, the hub trying to send power to the Pi on the same cable and the hub usually wins and causes problems with the Pi.

In my case both the Pi and the Hub have their own PSU.

Quote from: Jake36 on December 07, 2015, 01:06:33 PM

The 1 usb 3.0 hub that I've found to work with the Pi 2 B and compac's, is the Superbpag 7 port 70W 2Amp per port hub. I only have the Pi 2 B, so don't know if it works with any other Pi models or not.

Thanks for the information Wink

Biodom

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Quote from: Jake36 on December 07, 2015, 01:06:33 PM

Quote from: bestcoin_59 on December 07, 2015, 09:06:56 AM

Hi everybody Wink

Although it might not be related to the slight trouble described above, it noticed on the Cgminer window console that the figures in front of "WU" (in the far right of the screen) one of the compac (i currently run three compacs) does not look like the other figures.

Here is what i got:
Compac 1 WU: 166/m
Compac 2 WU: 162/m
Compac 3 WU: 45/m (only ?)

I set the frequency at 210 Mhz and the hash rates of the compacs are all between 9-12Gh/s

Btw what does "WU" stands for Grin

Have a great day Wink

Jeff.

If I remember right, WU = work utility or something like that.

Give the pot a little bit more of a turn on the low one and see if WU increases.

And why the Pi's have trouble with a lot of hub's, is some of the hub's back feed power to the Pi's. So you got the Pi trying to send power to the hub, the hub trying to send power to the Pi on the same cable and the hub usually wins and causes problems with the Pi.

The 1 usb 3.0 hub that I've found to work with the Pi 2 B and compac's, is the Superbpag 7 port 70W 2Amp per port hub. I only have the Pi 2 B, so don't know if it works with any other Pi models or not.

Superbpag also works on pi zero using a nonpowered usb 2.0 bridge (i used cheap 4 port Sabrent) in between.

ManualMiner

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Activity: 21

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You won't make anything.
It is not worth mining with a raspberry Pi,
Unless you are willing to use a 10000 block erupters.
Just buy an ASIC man.

Jake36

sr. member

Activity: 331

Merit: 250

Quote from: bestcoin_59 on December 07, 2015, 09:06:56 AM

Hi everybody Wink

Although it might not be related to the slight trouble described above, it noticed on the Cgminer window console that the figures in front of "WU" (in the far right of the screen) one of the compac (i currently run three compacs) does not look like the other figures.

Here is what i got:
Compac 1 WU: 166/m
Compac 2 WU: 162/m
Compac 3 WU: 45/m (only ?)

I set the frequency at 210 Mhz and the hash rates of the compacs are all between 9-12Gh/s

Btw what does "WU" stands for Grin

Have a great day Wink

Jeff.

If I remember right, WU = work utility or something like that.

Give the pot a little bit more of a turn on the low one and see if WU increases.

And why the Pi's have trouble with a lot of hub's, is some of the hub's back feed power to the Pi's. So you got the Pi trying to send power to the hub, the hub trying to send power to the Pi on the same cable and the hub usually wins and causes problems with the Pi.

The 1 usb 3.0 hub that I've found to work with the Pi 2 B and compac's, is the Superbpag 7 port 70W 2Amp per port hub. I only have the Pi 2 B, so don't know if it works with any other Pi models or not.

enhu

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Activity: 2492

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Had my Raspberry to which I installed puppy linux.

Has any of you did it will Arduino too?
Been trying to learn about the board and so i installed its ID and tested few scripts to work with it lately. Maybe someone also had tried it to work with an Asic miner device.

bestcoin_59

member

Activity: 305

Merit: 16

Hi everybody Wink

Although it might not be related to the slight trouble described above, it noticed on the Cgminer window console that the figures in front of "WU" (in the far right of the screen) one of the compac (i currently run three compacs) does not look like the other figures.

Here is what i got:
Compac 1 WU: 166/m
Compac 2 WU: 162/m
Compac 3 WU: 45/m (only ?)

I set the frequency at 210 Mhz and the hash rates of the compacs are all between 9-12Gh/s

Btw what does "WU" stands for Grin

Have a great day Wink

Jeff.

zOU

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Quote from: bestcoin_59 on November 27, 2015, 11:48:38 AM

Quote from: zOU on November 27, 2015, 11:04:30 AM

have you done sudo rpi-update ?

just to make sure your RPI is up to date ?

Hi,

I upgraded the packages, but was afraid to update the kernel/firmware because of this:
http://www.framboise314.fr/installer-une-version-anterieure-du-noyau-sur-raspberry-pi/
Any way, the number version of my firmware is 817 (uname -a)

Cheers,

Jeff.

That's what I'm running on RPI2

Linux raspberry 4.1.13-v7+ #826 SMP PREEMPT Fri Nov 13 20:19:03 GMT 2015 armv7l GNU/Linux

bestcoin_59

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Activity: 305

Merit: 16

Quote from: Guruclef on November 27, 2015, 11:37:43 AM

What kind of USB hub do you use? (USB? 2.0? 3.0?)

USB2.0

Quote from: Guruclef on November 27, 2015, 11:37:43 AM

And does it have an external power supply?

Yes. Here is the HUB:
http://us.dlink.com/products/connect/7-port-usb-2-hub/

Quote from: Guruclef on November 27, 2015, 11:37:43 AM

I used to have weird behavior from my compacs when I just got them and it solved when I increased the voltage on them (via the potentiometer/screw), but I use an external-powered USB 2.0 hub from orico. I didn't increase the voltage too much because I don't have a way to actually measure the voltages now.

If your hub doesn't have external power, or if it is cheap, maybe you need more power to make the sticks work OK. As you can tell I'm just learning, but one way of getting more power to a stick if you don't have a good hub is using a Y-cable like this one: http://www.ebay.com/itm/221661361513

Well it turns out that i encountered the same problem even if only one compac is plugged. Moreover, i never got any troubles when i (hot) plugged the three compacs on the HUB while the RaspberryPi is running, so it might not be a power problem.

That beeing said, i recently bought this cheap item:

http://www.amazon.fr/CARCHET-Voltm%C3%A8tre-Amp%C3%A8rem%C3%A8tre-Testeur-T%C3%A9l%C3%A9phone/dp/B00LHU0QRY/ref=sr_1_1?ie=UTF8&qid=8&sr=8-1&keywords=B00LHU0QRY

Quote from: Guruclef on November 27, 2015, 11:37:43 AM

Also I've read somewhere that USB 3.0 hubs don't behave correctly sometimes.

I read the same...

Cheers,

Jeff.

bestcoin_59

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Activity: 305

Merit: 16

Quote from: zOU on November 27, 2015, 11:04:30 AM

have you done sudo rpi-update ?

just to make sure your RPI is up to date ?

Hi,

I upgraded the packages, but was afraid to update the kernel/firmware because of this:
http://www.framboise314.fr/installer-une-version-anterieure-du-noyau-sur-raspberry-pi/
Any way, the number version of my firmware is 817 (uname -a)

Cheers,

Jeff.

Guruclef

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Activity: 97

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Quote from: bestcoin_59 on November 26, 2015, 04:07:19 PM

Quote from: notlist3d on November 26, 2015, 03:08:21 PM

It could be a crappy USB on amout of power. Have you tried running 1 instead of three?

That's what I would do is reduce amount of them and test it. See what happens. All usb hubs are not equal.

Even with one compac plugged on the HUB, it does not work. It only works when i plug the compac on the HUB after the Raspberry Pi is running. I also tried to plug the USB port of the HUB on the Raspberry Pi while the Raspberry Pi is running (having the compac already plugged on the HUB): it does not work either (even with just one compac).

It is all the more strange so as the compac (with its serial number) appears on the boot screen (when i turn the Pi on, and when everything is plugged).

Cheers,

Jeff.

What kind of USB hub do you use? (USB? 2.0? 3.0?) And does it have an external power supply?
I used to have weird behavior from my compacs when I just got them and it solved when I increased the voltage on them (via the potentiometer/screw), but I use an external-powered USB 2.0 hub from orico. I didn't increase the voltage too much because I don't have a way to actually measure the voltages now.

If your hub doesn't have external power, or if it is cheap, maybe you need more power to make the sticks work OK. As you can tell I'm just learning, but one way of getting more power to a stick if you don't have a good hub is using a Y-cable like this one: http://www.ebay.com/itm/221661361513

Also I've read somewhere that USB 3.0 hubs don't behave correctly sometimes.

zOU

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have you done sudo rpi-update ?

just to make sure your RPI is up to date ?

bestcoin_59

member

Activity: 305

Merit: 16

Quote from: zOU on November 27, 2015, 01:59:58 AM

Just got up :p

What OS are you using on the RPI ?

Raspbian ?
Minera image ?

I've had a lot of issues with the Dlink DUB H7, I'm just using it with my RPI and U3 now.

Hello zOU

OS: Raspbian
RapberryPi: the old B (not B+) version.
Software: GEKKO-CGMINER (4.9.2)

Cheers,

Jeff.

zOU

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Activity: 728

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★ these are stars ★

Just got up :p

What OS are you using on the RPI ?

Raspbian ?
Minera image ?

I've had a lot of issues with the Dlink DUB H7, I'm just using it with my RPI and U3 now.

bestcoin_59

member

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No one

bestcoin_59

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Merit: 16

Quote from: notlist3d on November 26, 2015, 03:08:21 PM

It could be a crappy USB on amout of power. Have you tried running 1 instead of three?

That's what I would do is reduce amount of them and test it. See what happens. All usb hubs are not equal.

Even with one compac plugged on the HUB, it does not work. It only works when i plug the compac on the HUB after the Raspberry Pi is running. I also tried to plug the USB port of the HUB on the Raspberry Pi while the Raspberry Pi is running (having the compac already plugged on the HUB): it does not work either (even with just one compac).

It is all the more strange so as the compac (with its serial number) appears on the boot screen (when i turn the Pi on, and when everything is plugged).

Cheers,

Jeff.

notlist3d

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Quote from: bestcoin_59 on November 26, 2015, 02:05:19 PM

Quote from: zOU on November 26, 2015, 01:58:29 PM

what freq are you running the sticks at ?

I had the same troubles whether i try to run at 150Mhz or 200 Mhz.

Quote from: zOU on November 26, 2015, 01:58:29 PM

have you tried just unplugging the hub ?(power+usb) ?

Yes, but it didn't solve the problem...

It could be a crappy USB on amout of power. Have you tried running 1 instead of three?

That's what I would do is reduce amount of them and test it. See what happens. All usb hubs are not equal.

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