A hardware watchdog timer isn't something that's "supported". To me that sounds like a software feature. A true hardware watchdog is a separate circuit that oversees the system. If it detects a problem it toggle the power controller chip to reset the whole board.
Greg On Dec 20, 2009, at 2:19 PM, Tom Sharples wrote: > That's good - but just because it's supported at the chipset level doesn't > necessarily mean the ubnt firmware or sdk supports it. In any case we were > working with the original a/g nano's and bullets, not the M series. The M is > way too new and bleeding edge for us. > > Tom S. > > ----- Original Message ----- > From: "Michael Baird" <m...@tc3net.com> > To: "Tom Sharples" <tsharp...@qorvus.com>; "WISPA General List" > <wireless@wispa.org> > Sent: Sunday, December 20, 2009 11:02 AM > Subject: Re: [WISPA] Ubiquiti ready for prime time? > > >> Tom, >> >> Try again, Ubiquity AR71xx based stuff (all the M series) supports a >> hardware watchdog fine. >> >> from dmesg via OpenWRT. >> Atheros AR71xx hardware watchdog driver version 0.1.0 >> >> Regards >> Michael Baird >> >>> A hardware watchdog timer, typically, watches only one thing - is the >>> software and/or CPU still alive? If a software pinger fails to reset a >>> hardware counter or timer every few seconds or so, the timer reaches the >>> end >>> of its count and resets the motherboard. It is a failsafe if everything >>> else >>> goes wrong - something that happens more often than one would like when >>> you're using developmental drivers. Software watchdogs are a poor >>> substitute >>> for obvious reasons - if the software or CPU is completely hung, the >>> software watchdog won't work either! >>> >>> Tom S. >>> >>> ----- Original Message ----- >>> From: "Mark Stephenson" <m...@countryconnections.net> >>> To: "WISPA General List" <wireless@wispa.org> >>> Sent: Sunday, December 20, 2009 4:12 AM >>> Subject: Re: [WISPA] Ubiquiti ready for prime time? >>> >>> >>> >>>> Tom, >>>> >>>> Do you happen to know what a hardware watchdog timer watches? Perhaps >>>> there >>>> is something it can watch like whether or not the device is sending on >>>> the >>>> Ethernet port or the program counter. But, it seems that as embedded >>>> systems >>>> add more software, a useful hardware watchdog timer becomes less >>>> possible >>>> because there are more things that can go wrong and it is >>>> difficult/expensive to make the hardware capable of checking those >>>> things. >>>> >>>> Thanks, Mark >>>> >>>> >>>> On 12/20/09 2:01 AM, "Tom Sharples" <tsharp...@qorvus.com> wrote: >>>> >>>> >>>>> A software watchdog timer is not the same thing as a hardware watchdog >>>>> timer. >>>>> And SNMP has nothing to do with either. >>>>> >>>>> Tom S. >>>>> >>>>> ----- Original Message ----- >>>>> From: jai...@budget.net >>>>> To: Tom Sharples ; WISPA General List >>>>> Sent: Saturday, December 19, 2009 9:03 PM >>>>> Subject: Re: [WISPA] Ubiquiti ready for prime time? >>>>> >>>>> >>>>> Please don't take me wrong on this but your statement (b) bothers me. >>>>> You >>>>> are either running a very old version of Air OS or you have no clue >>>>> what >>>>> your >>>>> talking about. UBNT has support for SNMP which I use to monitor not >>>>> only >>>>> uptime but signal strength and a few other key items check out ZenOss >>>>> if >>>>> you >>>>> need to watch these devices or any other network device for that >>>>> matter. >>>>> AirOS >>>>> also has a "Watchdog timer" in the software that will automatically >>>>> reboot a >>>>> device that fails a ping time you set. I have never had to power cycle >>>>> a >>>>> UBNT >>>>> device. In fact I had to reboot a Mikrotik router because it had a >>>>> locked >>>>> process in the packet sniffer application that drove the CPU to 100% so >>>>> the >>>>> UBNT gear has a higher uptime than the core router. >>>>> >>>>> Jaimie >>>>> >>>>> >>>>> On Sat 12/19/09 12:24 PM , "Tom Sharples" tsharp...@qorvus.com sent: >>>>> >>>>> My biggest concern with these units is (a) lack of mechanical >>>>> robustness - >>>>> little plastic bits leak or break off quite easily and (b) lack of >>>>> a >>>>> hardware watchdog timer which personally I think is essential esp. >>>>> when >>>>> you're using "development stage" firmware. We did most of the work >>>>> to >>>>> port >>>>> our Qcode to run on the ubnt platform, but have decided to shelf >>>>> that >>>>> project for another year, waiting for things to really settle down. >>>>> In the >>>>> CCTV business, there's no-one around to power-cycle the equipment >>>>> and >>>>> unrecoverable device hangs are really a disaster. I realize that >>>>> the >>>>> ISP >>>>> business is a little different because the customer can always >>>>> reboot >>>>> the >>>>> CPE! >>>>> >>>>> Tom S. >>>>> >>>>> ----- Original Message ----- >>>>> From: "Robert West" <robert.w...@just-micro.com> >>>>> To: <jai...@budget.net>; "'WISPA General List'" >>>>> <wireless@wispa.org> >>>>> Sent: Saturday, December 19, 2009 7:55 AM >>>>> Subject: Re: [WISPA] Ubiquiti ready for prime time? >>>>> >>>>> >>>>> >>>>>> I'm with ya on all that, Jamie. We've had minor issues but I expected >>>>>> things to not be perfect, they never are with version 1.0! The trade >>>>>> off >>>>>> is >>>>>> worth it, for me anyhow. >>>>>> >>>>>> Bob- >>>>>> >>>>>> >>>>>> -----Original Message----- >>>>>> From: wireless-boun...@wispa.org [wireless-boun...@wispa.org] On >>>>>> Behalf Of jai...@budget.net >>>>>> Sent: Saturday, December 19, 2009 10:26 AM >>>>>> To: WISPA General List >>>>>> Subject: Re: [WISPA] Ubiquiti ready for prime time? >>>>>> >>>>>> >>>>>> We use all UBNT and I have been very happy with the equipment. >>>>>> Tower has 2 Rocket M5s With 120 sectors, backhaul is Rocket M5s with >>>>>> the Rocket Dish. CPEs are Nano M5. Durring testing at 4 Miles with >>>>>> CPE to AP I was able to sustain symmetrical speeds of 75M to our >>>>>> test server on the other end of the backhaul. I was really amazed at >>>>>> how well they preformed for the price. I have read all the horror >>>>>> stories in the UBNT forums but have yet to have one problem. Probably >>>>>> just cursed myself and should of kept my mouth shut. But so far so >>>>>> good. >>>>>> On Sat 12/19/09 6:35 AM , Mike m...@aweiowa.com sent: >>>>>> I was almost ready to pull the trigger on some Ubiquiti equipment >>>>>> for >>>>>> a new project. The scent of low price is alluring. Then I start >>>>>> reading about connectors pulling out, connectors not soldered on >>>>>> properly, and the wrong boot code on boards. >>>>>> Is it too early? Should I wait a bit before I dive in? Has the >>>>>> haste to get product into the distribution stream compromised >>>>>> quality >>>>>> control? Is the low price just too good to be true? I'd be >>>>>> interested in some constructive thoughts and analysis. >>>>>> Thanks mg >>>>>> >>>>>> ---------------------------------------------------------------------------- >>>>>> ---- >>>>>> WISPA Wants You! 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