PoE Network controlled signage

I may have a requirement for several 'remote controlled' illuminated signs. (where remote could be network driven) - These aren't Scrolling LED 'calls in queue' type ones, but more the warning 'Laser on', 'Mic Live', 'Conveyor Running' type ones.

Normally these things seem to be driven directly from some local switchgear or output, but what if you want to gather status centrally , or illuminate the sign depending on some remote sensor (be it a web tsunami alert or the boss' car being picked up on the ANPR at the gate)

Cue a quick hacky prototype: Take one nanode and use the digital outputs to drive a mosfet to switch some cheap LED strips from IKEA. So far so good, but that requires a 12v (since thats what the strips use) supply. The nanode can take that on the screw inputs if you add a heatsink to the reguator, but I'd rather get rid of the PSU alltogether: cue a cheapo 802.3af PoE splitter from TP-Link, and I have the whole lot driveable off one RJ45 cable.

Onwards to software, and it looks like bitlash / restuino look useful (esp if I get the whole lot working with DHCP too).

Anyway, with a range of lighting areas possible (thanks to addressable outputs on the nanode) per display, the option to have a nice facia with multiple 'zones' illuminated is possible. Now to find a nice case...

puppet /. facter / v12n

As I'm starting to get into puppet, especially when used with the foreman for dashboard display, I've started noticing a few (fixable) oddities

1st up ios that not all RHEL clones are treated equally -- some patches are just adding detection and flaggin, others go the full hog and make sure its in all the "constrain:" sections in facter too. I guess I need to do a code review and pull in the extras. Cue lots of different VMs
(the joys of a weeks home leave from work..)

secondly, virtualisation detection is 'flakey' -- some (vmware) are really well detected, but new kernels give false positives (see issue #7723) so I'm going to set about tidying these up and adding hyper-V detection properly

FTTH / Reso-LIAIN / K-Net

Executive Summary:

I've had fibre installed to the flat. In this area it's all organised by Reso-LIAin who have 'local' ISPs who resell their network. Luckily for me one of the PoPs is located at work so I have nice small (<2ms) pings to site.


So what's involved? Choose your ISP from the shortlist (of about 5) -- all roughly the same prices, some offering more bundled stuff at cost. I ended up with 'k-net' (formerly known as kwaoo.com). They seem to be rather dependent on one supplier if you look at their AS24904. Contractors from reso-lian show up to pull the fibres into your property -- In my case they'd already run multicore into the building (1st and 3rd floors had breakout boxes installed) and I was the first to get it from there. They pull (through the france telecom duct -- which should be installed anyway) a 2-core fibre and terminate it at the CPE (which must be powered, so you have to define a location within reach of a wall-wart. They will put the CPE up to 5m from the france telecom entry point, in my case I asked for it in the walk in cupboard. Being an old flat, the duct was smaller than current Normes (building standards) and partially blocked. when they repulled the phone cable (in use for ADSL) they managed to snap it. It now leaves the duct at floor level rather than in the patress. Hmm.




The 4 ethernet ports are split from 2 vlans - ports one and two carry 'internet' traffic - you give the MAC address of your router (I purchased my own) and they put it in the DHCP server. (you get a static IPv4 address). Ports three and four are for the IPTV service. This is multicast and although they supply a set top box, I've not bothered renting one, as I'll just watch it with VLC instead. Status of the TV streams is available (from reso-liain) at http://81.18.191.108/tv/liste_tv.html (found via their forum).


Phone service is VoIP -- They will port your existing number (this is the only resason my freebox is still active - am waiting till thats done before cancelling service) and will sell or rent you an ATA. Since they send config details in the mail, I shall use my polycom and if brave the SPA3102.

Disadvantages: No IPv6 yet. boo. Especally as I was used to having it with free. Other than that? I've only mailed specific tech Questions at their helpdesk and theyve been OK (such as can you set reverse dns to ...... -- which they do :-)

Shuttle bus tracker

Not that I tend to err, leave things till last possible minute or anything, but I'd really like to have a tracking system on the CERN shuttle busses, so that I can stay in the office until I know the bus is coming. (or, armed with a mobile device waiting at the stop, see where it is)

So - I was thinking something embedded ish that contained a cheapo GPS chipset (probably good enough signal on the dasboard, a 2 line LCD and a keypad

something UI ish for driver along the lines of 'select route:'
and then it'd show the route, upcoming timetabled stops

backhaul to site would be GSM (should be able to transmit a small UDP packet of transponder#,Route#,Position,timestamp) to a central server.

The folks over at rpi.edu (yes, they started concerto too) already have some code that looks interesting at https://github.com/wtg/shuttle_tracking/


Question is, would it be cost effective to roll our own, and if not, who's offering the best / cheapest (open) system out there?

nanode built!

One successful evening of soldering, and lo, I have a working nanode. Started off nice n basic with the resistors, but overall a pretty simple pcb to assemble:

Plugged it in, and lo, blinky LED. Have since flashed with the EtherShield Drivers and its happily getting an IP address. now for some pachube / twitter / other integration...

Orange VoIP woes

Our livebox2 repeatedly used to lose the VoIP service (somewhat annoying as we don't have a 'physical' pots line, just ADSL signal on the copper pair)

however there's now a subtle hint on the config pages NOT to change the DNS servers from the automatic setting (we used to use opendns for content filtering)

So, anyone know what hard-coded voodoo sagem/orange were up to?

Electronic components

Vigilant readers (ha, who am I kidding) will have noticed I've been starting on some ATmega hackery, but I'd like to prototype up without needing to but an arduino (clone) card for each one. So, off to the electronics equivalent Laminated Book Of Dreams (ie, farnell) to stock up on core components.

Discussions have come up with something like the following list, but what else should be added?

* LEDs - Was going to get both a selection single and a couple of RGB ones
* pile of resistors
* capacitors - elecrolytic and ceramic
* Diodes - signal. power, zener
* Voltage regulators
* 2n7000 mosfets
* generic transistors
* couple of atmega chips, crystals etc (core componets of arduinos)
* battery holders
* reset switches
* hookup wire
* breadboard (one decent and one small)

More specific bits I also want are
* rf12 boards
* opto isolator for telemetry input
* moar jeenodes :-)