[Commotion-dev] ubiquiti auto-reset

[Danny Iland]

Josh,

No problem! That thread is a good resource for sure.

I plan on connecting a Moteino (Arduino clone w/ 433MHz wireless radio) to
the TTY serial port sometime in February, so if you guys are planning to
build one of the inline reset switches we'll have two ways to remotely
reset the radio.

Danny


On Thu, Jan 30, 2014 at 2:04 PM, Josh King <jking at opentechinstitute.org>wrote:

> Thanks Danny! I noticed at the end of the thread that someone made their
> own custom inline reset switch using Flemming's schematics:
>
>
> http://community.ubnt.com/t5/airMax-General-Discussion/Remote-hardware-reset-circuitry-of-NanoStation-M/td-p/58320/page/3
>
> Also Flemming's response to the Ubiquiti engineer about the lack of
> specs is pretty hilarious. :-)
>
> Let me know if you give it a try. We intend to try it out here as soon
> as we get a spare moment. Seems like it should be pretty easy.
>
> On 01/30/2014 04:42 PM, Danny Iland wrote:
> > A guy named Flemming Frandsen posted some information about simulating
> > the PoE injector's reset button on the Ubiquiti forums, and his own site.
> >
> > Here's the discussion
> > <
> http://community.ubnt.com/t5/airMax-General-Discussion/Remote-hardware-reset-circuitry-of-NanoStation-M/td-p/58320>
> and circuit
> > diagram <http://dren.dk/mreset.html> with more detail.
> >
> > "Bottom line is that to press the reset button on the M-series hardware
> > remotely all you need to do is to put +15 to +24V on the center tap of
> > the ethernet transformer at the remote end, with respect to the power
> > supply ground. I haven't tried it but it ought to be possible to simply
> > put + on any one of the 4 wires."
> >
> > If you want to use an Arduino connected directly to the radio instead of
> > the ethernet cable, there's a COLD_RST pin on the JTAG header, or you
> > could connect to the TTY serial port and perform a software restart.
> > See the openwrt wiki
> > <http://wiki.openwrt.org/toh/ubiquiti/nanostation> or Ubiquiti's page
> > <http://wiki.ubnt.com/index.php/NanoStation2_RS232_Connection> for
> > details. Any 3.3V arduino would work for this, or any arduino with a
> > level converter.
> >
> > Anyone have experience with this? If not, I might give it try pretty
> soon.
> >
> > Danny Iland
> >
> >
> >
> > On Thu, Jan 30, 2014 at 1:25 PM, Josh King <jking at opentechinstitute.org
> > <mailto:jking at opentechinstitute.org>> wrote:
> >
> >     Hi all,
> >
> >     I was speculating today about how we might be able to more smoothly
> >     automate testing on our various testbed networks. Particularly, I was
> >     thinking about how CONFINE uses a recovery device as a "parent" to
> power
> >     cycle a stuck node (
> http://wiki.confine-project.eu/hw:recovery-device).
> >     This made me think about how some Ubiquiti POEs have a reset button
> that
> >     is able to send a signal over the wire to flip a node into TFTP mode
> in
> >     the same way as the reset button on the node itself. I was wondering
> if
> >     anyone was familiar with how that process actually worked (I assume
> >     through sending some hi/low signal on one of the ethernet pins that
> the
> >     chipset in the node recognizes), and if it was possible to simulate
> it
> >     using an Arduino or similar. It would be great to be able to pair
> >     testbed nodes with something like a raspberry pi that could remotely
> >     reset and TFTP nodes with new firmware and run network tests
> independent
> >     of the nodes themselves.
> >     --
> >     Josh King
> >     Lead Technologist
> >     The Open Technology Institute
> >
> >
> >     _______________________________________________
> >     Commotion-dev mailing list
> >     Commotion-dev at lists.chambana.net
> >     <mailto:Commotion-dev at lists.chambana.net>
> >     https://lists.chambana.net/mailman/listinfo/commotion-dev
> >
> >
>
> --
> Josh King
> Lead Technologist
> The Open Technology Institute
>
>
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