[Nut-upsdev] Tripp-Lite SMART1500LCDT

Marco Walther marco at sonic.net
Sun Aug 7 05:00:52 UTC 2016

On 08/05/2016 03:03 PM, Marco Walther wrote:
> On 08/05/2016 01:36 PM, Stuart D. Gathman wrote:
>> On Fri, 5 Aug 2016, Marco Walther wrote:
>>> On 08/03/2016 05:25 AM, Stuart Gathman wrote:
>>>>  I've made some progress getting this Tripplite to work:
>>>>  http://gathman.org/2016/07/30/Standard_Schmandard/
>>>>  Basically, plug it into a USB hub that actually implements USB2.0, 
>>>> then
>>>>  power cycle the port when it hangs.  It does seem to be a hardware
>>>>  problem with the USB controller.
>>> Finally an idea;-) I had the same problem for a couple of years but 
>>> since I use a [1st gen] appleTV as the server, I thought it might be 
>>> it's USB port.
>>> I bought a `plugable USB2-HUB-AG7' and experimented a bit. So far, I 
>>> did not get it to turn the power to devices completely off:-( But 
>>> the unbind/bind seems affect the devices somehow. I tried it with a 
>>> little Sparkfun RedBoard (Arduino clone) and when I [re]bind, the 
>>> RX/TX LEDs flash shortly, so it seems to reinitialize it's 
>>> USB-Serial chip. Maybe that's enough?
>>> The same TX/RX LED flashing happens with the hub-ctrl power off->on;-)
>>> OK, the USB hub is now installed between the aTV & USP ;-) Let's see 
>>> what happens next.
>> I also bought a USB2-HUB-AG7, but the new black version (of the *same*
>> model# - arrrrgggghhhh) no longer implements PPPS.  Only the old silver
>> version does.  What is the point of a model# if you can't count on the
>> functionality?
> Mine even says v1 on the type sticker:-( but it's black as well. So 
> I'll see how things behave once I loose the UPS connection and do a 
> `hub-ctrl power off->on'. I'm not really interested in the power off, 
> just in the reset;-)
OK, that did not work:-( Neither the `hub-ctrl power off->on' nor the 
unbind->bind of the hub did reset the USB connection enough that the OS 
would see the UPS again:-(

Stuart, did you  find an USB hub which can actually switch the power? 
Otherwise, I'll probably go down the road of creating an Arduino-based 
power-switch at least as test setup.

-- Marco

> If that does not work, I'll probably try a Arduino-based power-switch 
> cable. Since it now looks like it's really the UPS, I can actually 
> think about different ways.
> Thanks,
> -- Marco
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