Mikko wrote some more about the Leh installation. Here is part two. [Things I Learned Building the Skynet PART 2 — How to Eat Dust] https://medium.com/@skynet.admin/things-i-learned-building-the-skynet-part-2-how-to-eat-dust-1a0c78a48fc7#.oc1bzbwcs
I also just returned from a month long trip to spiti valley (adjoining to Ladakh, 14000ft, -10C) teaching locals to setup mesh networks and schoolservers. It looks like they are setting those up in a couple of villages in the valley. Back in Dharamsala now improving the resilience of these devices and the QoS of mesh networks. On Fri, Sep 9, 2016 at 9:57 AM, Anish Mangal <anis...@umich.edu> wrote: > Yes, we plan to put a temp & humidity logger in the box next time we > deploy this (or maybe put one in these boxes). Frankly we didnt do much > testing other than waterproofing testing before deploying this so would be > very interesting to see how it holds up in the cold winters. > > Right now, we just used the buck converter with panel and without battery > so the node switches off every evening. > > Thanks for sharing the paper, will go through it. > > On Thu, Sep 8, 2016 at 3:17 AM, James Cameron <qu...@laptop.org> wrote: > >> Good reading, thanks. Looking forward to more. >> >> The clear bottle packaging of the routers in the photographs is >> interesting. Looking at the climate data for Leh; >> >> https://en.wikipedia.org/wiki/Leh#Climate >> >> my guess is that the bottle will make a good thermal environment; >> spending the most time within the temperature range of the router. >> Router radios become less sensitive as temperature increases. >> >> Charting inside and outside temperature would be interesting. >> >> At high altitudes my caution would suggest a watchdog circuit for the >> DC to DC converter, to switch it off and then on again if the router >> isn't responding. Especially where batteries are used. Where no >> battery is used, a node will restart next morning, and that may be >> enough to handle the more frequent single event upsets. >> >> http://www.dfrsolutions.com/pdfs/2004_HighAltitude_Hillman-Blattau.pdf >> >> -- >> James Cameron >> http://quozl.netrek.org/ >> _______________________________________________ >> Server-devel mailing list >> Server-devel@lists.laptop.org >> http://lists.laptop.org/listinfo/server-devel >> > > > > -- > Anish > > > -- Anish
_______________________________________________ Server-devel mailing list Server-devel@lists.laptop.org http://lists.laptop.org/listinfo/server-devel