Well, I have some bad news myself.

After having 6 sticks running on the Sipolar A-400 at around 4.8 Mh/s each, my hub just died today.

I have free electricity (at work) so I wasn't really worried about making a small amount of coin since it was just a fun hobby.

But now I'm looking at plunking down even more cash for another hub and I just don't want to deal with it 

Take my warning: the Sipolar A-400 is great until it dies.

I bought it for $66.74 on AliExpress and put it into service around Jan 10th.

So after about 4 months of constant use, it died.

Very sad!

Great idea, thanks!

Oh! I was wondering about that serial number.

Where can I find the number on the board? Or how do they relate?

Maybe I'm dumb, but is there an easy way to tell which device is which?

In BFGminer, I have the list of 6 devices, MLD 0 - 5. Occasionally I'll get a message of "MLD 5: ASIC has stopped hashing, attempting to restart".

I know it's because of power issues.

But I can't seem to isolate the problem one.

I've tried to disable it through the "manage devices" menu, but all devices keep flashing leds.

Is there some trick to figure it out?

Got my shipment notification from Asicpuppy as well.

This is better than Christmas!

Thanks! That worked great for me! I was pulling my hair out on how to do that!

At the end of the month when batch 2 preorders ship, there will be "in-stock" units available for more than pre-order price, but less than eBay price.

There's some recommendations on the USB HUB thread

I had mine working just fine on multipool.us.

I'm currently using mining-dutch.nl and I was using hash-to-coins.

Just stuck the new driver on my Rasp Pi 2 and it's working fine!

If you're seeing a lot of "restarting" messages, your settings aren't quite working. I did more adjusting to the voltages ans now have it running at a steady 5.3 Mh/s. I'm not sure about temps but when I touch it, it doesn't immediately burn me.

I should probably get a thermometer...

Anyway, thanks jstefanop for your awesome work and dedication!

Woo-hoo! I can't wait!

You're awesome jstefanop!

I've already ordered 2 more in-stock units and 3 more preorders for the next batch! These are great!

I've been watching my miner all day and I think you're right about hash-to-coins. They're doing something that's causing the miner to lock up after a while.

I did notice that on the site, it listed the difficulty as 1024. I wonder if their vardiff calculation is bad.

Well, for now I've switched to only mine at mining-dutch. I'm steady at 5Mh/s there.

It looks like you're running into the dreaded "stick died and didn't auto restart" problem.

Is the red light blinking on the stick?

It probably isn't.

You should restart the miner (either press then and then or press to quit and then rerun the startup script)

If it still doesn't blink the red light, pull the stick out and then plug it back in and restart the miner.

If it still doesn't work, your settings probably need to be adjusted. Check the "Tuning" section for details.

You should use --no-submit-stale

I'm mining tips because of the low difficulty. Try a different coin for a bit and see if that works better.

I've found that my stick was getting stuck constantly when I would use hash-to-coins but it wouldn't get stuck as often on mining-dutch.

I thought that was a clue and narrowed it down: the difficulty was too low on hash-to-coins! I upped the difficulty (actually, I just set it to vardiff) and it's been much happier.

It still will get stuck after an hour or so, but usually doing a " -> -> " (Settings -> Restart -> Yes) cycle would start it back up again.

Awesome! I'm having this same problem and I'm looking forward to the update!

Again, you're an incredibly awesome person!

Long time lurker, but felt like I finally needed an account.

jstefanop, you're absolutely awesome! I pre-ordered a single kit back way back when from AsicPuppy.

I got it on Saturday (I didn't get a shipment notification, but when I emailed AsicPuppy, they sent me a tracking code. But it was already delivered! Fine by me!) and have it hashing away right now using a Raspbery Pi 2 connected to the Pluggable 2.0 USB hub that was recommended in the Hub thread.

I'm pointing it at multipool.us because I want to collect all the different coins they mine (I may look into even smaller scrypt coins just for fun!). I know I will probably never make back the money, but I've spent far more money on hobbies I ended up not liking.

jstefanop, your dedication and support to this product is amazing. I hope you don't get discouraged from a small minority of people complaining. They probably never designed, built, tested and shipped a complete electronic device before. So what do they know?

I'm looking forward to the next batch! Maybe I'll buy 2 more to fill up the USB hub!