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Topic: LightningAsic usb miners based Gridseed GC3355 Tech Support Thread - page 21. (Read 73479 times)

member
Activity: 84
Merit: 14
Can anyone that is more knowledgeable with code explain to me why the controller is able to disable the BTC core when only mining Scrypt, yet connected to windows PC the cores activate and stay idle?  Sorry ive mentioned this many times but its really starting to bother me that its wasting power an I would like to understand it better.  Thanks in advance.

Are you using cpuminer or cgminer? There's a specific set of bytes you have to send to the controller that tells it to disable the BTC units. cpuminer does this, and that's what the controller is using afaik, whereas cgminer doesn't.

I've noticed that even when just scrypt mining the controller board runs cgminer with the following parameters(run a ps command while scrypt mining)....

/www/soft/cgminer --dif --gridseed-options=baud=115200,freq=850,chips=5,modules=1,usefifo=0,btc=0 --hotplug=0 -o stratum+tcp://[your.pool.com] -u [your.username] -p [your.password]

so there is a possibility that one of these statements causes the cores to shutdown and draw no power

That must be using a custom version of cgminer then, as the sources gridseed published on github don't support those flags.

EDIT: I retract that, they posted updated cpuminer and cgminer sources less than a day ago that support those flags.
member
Activity: 68
Merit: 10
Can anyone that is more knowledgeable with code explain to me why the controller is able to disable the BTC core when only mining Scrypt, yet connected to windows PC the cores activate and stay idle?  Sorry ive mentioned this many times but its really starting to bother me that its wasting power an I would like to understand it better.  Thanks in advance.

Are you using cpuminer or cgminer? There's a specific set of bytes you have to send to the controller that tells it to disable the BTC units. cpuminer does this, and that's what the controller is using afaik, whereas cgminer doesn't.

I've noticed that even when just scrypt mining the controller board runs cgminer with the following parameters(run a ps command while scrypt mining)....

/www/soft/cgminer --dif --gridseed-options=baud=115200,freq=850,chips=5,modules=1,usefifo=0,btc=0 --hotplug=0 -o stratum+tcp://[your.pool.com] -u [your.username] -p [your.password]

so there is a possibility that one of these statements causes the cores to shutdown and draw no power
newbie
Activity: 37
Merit: 0
Anyone know if we can expect to see fan control in the software/firmware in the future? or if the fans are hard wired?

I really would like to lower the speed, I don't see that I need all this for only mining LTC and I'd like to keep the setup close to my living space.
member
Activity: 84
Merit: 14
What do you guys use to power these things up?
In simple words, what all do I need to start hashing if I buy say one of these.

They're supposed to come with everything (miners, PSUs, USB hubs, and controller), but some have arrived without controller or USB hubs Sad
newbie
Activity: 46
Merit: 0
poopypants compile this one:

https://github.com/gridseed/usb-miner/blob/master/software/cpuminer/

It doesn't send the commands to activate the BTC cores, so you'll be fine with it in LTC only mode.

The miners work pretty interesting however. They used a version of cgminer which already had scrypt support removed. BTC only mode runs with cgminer. LTC only mode with cpuminer. To get dual mode you have to run them side by side - cgminer handles BTC like normal, cpuminer only polls work to do from the pools then sends it in upd packets to cgminer which gives it to the LTC cores. cgminer then sends the results back in upd packets to cpuminer...
legendary
Activity: 1134
Merit: 1000
What do you guys use to power these things up?
In simple words, what all do I need to start hashing if I buy say one of these.
member
Activity: 84
Merit: 14
Can anyone that is more knowledgeable with code explain to me why the controller is able to disable the BTC core when only mining Scrypt, yet connected to windows PC the cores activate and stay idle?  Sorry ive mentioned this many times but its really starting to bother me that its wasting power an I would like to understand it better.  Thanks in advance.

Are you using cpuminer or cgminer? There's a specific set of bytes you have to send to the controller that tells it to disable the BTC units. cpuminer does this, and that's what the controller is using afaik, whereas cgminer doesn't.
member
Activity: 84
Merit: 14
full member
Activity: 134
Merit: 100
Can anyone that is more knowledgeable with code explain to me why the controller is able to disable the BTC core when only mining Scrypt, yet connected to windows PC the cores activate and stay idle?  Sorry ive mentioned this many times but its really starting to bother me that its wasting power an I would like to understand it better.  Thanks in advance.
sr. member
Activity: 376
Merit: 250
sr. member
Activity: 420
Merit: 250
newbie
Activity: 21
Merit: 0
Can anyone who has contacted one of asiabtc's support people post their skype names? I'm not getting any response from their official skype and need to speak to one of their support folks.
newbie
Activity: 21
Merit: 0
member
Activity: 109
Merit: 10
newbie
Activity: 46
Merit: 0
No, you can not "flash" the lightningasic firmware since we don't have the original firmware file, but you can install openwrt to any embedded device with the same hardware and copy either the gridseed, or now even the LA files over it to make it a "controller".
sr. member
Activity: 376
Merit: 250
Speaking of the controller, anyone know where I can buy JUST the controller in case the supplier doesnt come through?

This is the actual TP-Link device:  http://www.amazon.com/dp/B005VEJ3GM/ref=wl_it_dp_o_pC_S_ttl?_encoding=UTF8&colid=1G6FH2VD75Q7T&coliid=I2I7480GEDQPFF

But keep in mind the the controller has different firmware.  I dont think anyone has tried to buy this and then flash it with the LightingASIC firmware to see if it will actually work or not.

The only other way that i can think of getting a controller is buying from Gridseed or someone like Jack/LightingASIC.
sr. member
Activity: 440
Merit: 250
The PCI-e cables can also be used.

That was my original plan but Fry's didnt have ANY PCIe extension cables. I wonder how that place stays afloat sometimes. I cant tell you how many times I've been there looking for something fairly common only to not find it. Ugh...

I ended up using the 4 pin drive connectors and the miners all seem to be fine. I'm sure they will be even better in single mode when I get my controller.

Speaking of the controller, anyone know where I can buy JUST the controller in case the supplier doesnt come through?
sr. member
Activity: 420
Merit: 250
I have been going through the .php files, and although I don't understand most of it (I am not a programmer), doesn't this mean that the hashrate shown in the webinterface is actually a derived hashrate as well, and not the actual measured hashrate?

Code:
function getLtcHashrate() {
$cache = new Cache(PATH_CACHE);
$stats = $cache->get(CACHE_STATSUI);
$ltc = array();
var_dump($stats['ltc']);

foreach($stats['ltc'] as $devid => $ltcminer) {
$hashrate = 0;
foreach($ltcminer as $diff => $shares)
{
$hashrate += $shares['valid'] > 0 ? ((float) $diff * pow(2.0, 15)) / ((time() - $shares['time']) / $shares['valid']) : 0;
}
$ltc[$devid] = round($hashrate / 1000);
}
return $ltc;
}
sr. member
Activity: 420
Merit: 250
2. Can you tell me how you wired this up?

If using a stand alone PSU, on the 20/24 pin connector:
1) Optional: Put a high wattage resistor across a red (5 volts)and black (ground) wire. Pins 23 and 3 work well. This puts a 5 volt load and stabilizes the 12 volt rail.
2) Short pin 16 (green: power on signal) to a black wire (pin 19 works well). This turns the PSU on.

For all PSUs:
3) Take a drive connector. The yellow wire is 12 volts, and the black wire is ground. On the miner power cable, the Red Miner Wire connects to Yellow PSU wire, and the White Miner wire connects to the Black PSU wire.

Although the Drive wire connector is rated for 11 amps (130 watts), I wouldn't put more than 4 amps (50 watts) on a single wire. Although that would be all 10 miners in LTC only mode, to be safe, I wouldn't put more than 2 miners per Drive wire.

I'm thinking of using a standard PC power supply to power the miners.

What is your reasoning behind only putting 2 miners per drive wire?  From my understanding 130 watts should support at least 15 miners.

Can the PCI-E cables be used at all?

The reasoning is just to make sure you don't accidentally melt the cables when enabling dual mode (which you currently can't disable on other device than the supplied controller).

The PCI-e cables can also be used.
newbie
Activity: 54
Merit: 0
2. Can you tell me how you wired this up?

If using a stand alone PSU, on the 20/24 pin connector:
1) Optional: Put a high wattage resistor across a red (5 volts)and black (ground) wire. Pins 23 and 3 work well. This puts a 5 volt load and stabilizes the 12 volt rail.
2) Short pin 16 (green: power on signal) to a black wire (pin 19 works well). This turns the PSU on.

For all PSUs:
3) Take a drive connector. The yellow wire is 12 volts, and the black wire is ground. On the miner power cable, the Red Miner Wire connects to Yellow PSU wire, and the White Miner wire connects to the Black PSU wire.

Although the Drive wire connector is rated for 11 amps (130 watts), I wouldn't put more than 4 amps (50 watts) on a single wire. Although that would be all 10 miners in LTC only mode, to be safe, I wouldn't put more than 2 miners per Drive wire.
[/quote]

I'm thinking of using a standard PC power supply to power the miners.

What is your reasoning behind only putting 2 miners per drive wire?  From my understanding 130 watts should support at least 15 miners.

Can the PCI-E cables be used at all?
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