Tag Archive: Switch


An update on my latest project

Further to: https://tickett.wordpress.com/2012/12/31/a-new-year-a-new-project/ I have discovered quite a few things, and it looks like I’m not going to have to start from scratch (although I may still be designing some form of hardware, it’s hard to tell at this point).

Existing projects/products set out to do something similar:

NPlug- http://www.indiegogo.com/projects/283102/x/2060579

  • Consumption measuring (believed to be more accurate than existing devices)
  • Remote switching
  • WiFi connected (requires no bridge/gateway device)
  • Zigbee 802.15.4 for connecting to other devices
  • USB option (add 3G dongle, additional RF interface etc)
  • SoC running OpenWRT Linux
  • Open source
  • Lots more…
  • £100 (estimate)

This is really meant as a single device and not to be used with every appliance in the home. The device acts like a gateway itself and aims to connect to existing consumption/switching devices such as the IRIS / AlertMe suite.
I have pledged as a sponsor for this project, and hope to get my hands on a prototype- however, the funding has been a bit slow, so please help out :)

AlertMe (IRIS)- https://www.alertme.com/shopping

  • Consumption measuring
  • Remote switching
  • Zigbee
  • Requires the SmartEnergy pack as a bridge/gateway to the internet
  • £25

Ubiquiti mFi mPower- http://www.ubnt.com/mfi#m-Power

  • Consumption measuring
  • Remote switching
  • WiFi connected (requires no bridge/gateway device)
  • Comes in 3 flavours: Single, 3 socket extension cord and 8 socket extension cord
  • Only currently available with US / EU plugs
  • No EU stock currently available (when it is, I will try one with a UK plug adapter)

Belkin WeMo Switch- http://www.belkin.com/uk/c/WSWH

  • Switching only by the look of it
  • WiFi connected (requires no bridge/gateway device)
  • £40

Meter Polug- http://www.indiegogo.com/meterplug/x/2060579

  • Consumption measuring
  • Remote switching
  • Bluetooth only- so unless you’re within range and carrying a bluetooth equipped device, it’s not much good. This being said, the project has been fully funded, so there is clearly demand for such a device.
  • I have asked whether they’ve considered building a gateway device to enable internet connectivity but yet to hear back. Fingers crossed.

Other

  • I have purchased a USB Zigbee packet sniffer in the hope that I can make sense of some of the traffic floating around my house from various “smart” gadgets.
  • Still waiting on delivery of my EVE Alpha board- http://www.kickstarter.com/projects/ciseco/eve-alpha-raspberry-pi-wireless-development-hardwa this should allow me to start doing some cool stuff with a raspberry pi using the gpio pins rather than dozens of USB sticks!
  • The guys over at flukso have confirmed that they will be continuing work on their enhanced hexabus plug once they have another project out of the way: https://www.flukso.net/content/hexabus-plug
  • I sent some details to a few companies in an attempt to understand costings for PCB design, production and assembly. Just one company has responded to date: http://www.newburyelectronics.co.uk/ – for something like the Hexabus plug they’re suggesting (rough figures): £1,000 PCB design (£500 each of the 2), £80 PCB production (£40 each of the 2), £60 parts (excluding several parts they can’t source), £130 assembly & inspection. Bringing the total in at about £270/device (forgetting PCB design)- ouch!

That’ll likely be my last update for a few weeks, as I’m off to Thailand shortly :)

L

A new year, a new project

*EDIT*: Update on this project https://tickett.wordpress.com/2013/01/10/an-update-on-my-latest-project/

So I realise I have been a little quiet on here lately, and so will make it my new year’s resolution to get back in the habit of blogging regularly.

I would like to share some details of a project I’m assessing for feasibility. It is yet to be named but in essence I’m looking at building an Automated Mains Plug / Socket, let’s call it aPlug.

What do you mean by automated?

  • Remotely switchable / “programmable”
  • Monitor / log power / energy consumption

Don’t these already exist?

  • A lot of rf controllable plugs exist but there are a number of limitations- # cannot integrate with other equipment, # cannot operate from outside of the home, # cannot operate without the supplied remote, # cannot determine current state
  • Some power / energy consumption monitoring plugs exist but again, bare limitations- # cannot integrate with other equipment, # require a gateway device to post data to the internet
  • A few devices even exist which address both requirements but- # cannot integrate with other equipment, # cannot operate from outside the home, # require a gateway device (possibly even an entire pc to post data to the internet), # are expensive, # are closed source

There is however, one possible hope! The hexabus plug: http://signup.hexabus.net/ – I am trying to make contact with the guys behind the hexabus plug to determine where the project is currently, where it’s headed etc. Regardless, the great thing about the project, it is open source- which means the schematic / parts list (BOM) have been published: https://github.com/mysmartgrid/hexabus – unfortunately the PCB layout doesn’t appear to’ve been, but again, I’m hoping it will be shortly.

This project has also sparked the interest of the guys over at flukso, and became the center of a talk at one of their meetings: https://www.flukso.net/files/presentations/flukso.20121026.hack_hexaplug.pdf – where they have suggested a minor tweak to enable interconnectivity with jee labs devices (they include a PCB layout, which suggests they likely have them- I am trying to make contact with them too!)

Even if I manage to make contact and get details of the existing device I still have a lot to tackle…

Network connectivity
I’m currently looking at options, but it makes sense to try and learn from the lessons the guys behind LIFX: http://www.kickstarter.com/projects/limemouse/lifx-the-light-bulb-reinvented
They have essentially gone down the route of creating a mesh network with “slave” devices, then using a “master” device to bridge to the local area network (LAN) and essentially the internet. This ultimate is a gateway device but “in disguise”- and unless I can miraculously find a way of driving down the cost I can’t see any other approach being feasible?

Prototyping
I am making contact with a number of companies who design, produce and assemble printed circuit boards (PCBs) as a number of the components involved in the device cannot be soldered by hand nor can the circuit(s) likely be built using a simple breadboard. I imagine this is going to be a real challenge as the cost for “one-off” or very limited production runs is likely to be extremely high.

Software / Firmware
I have coded some simple arduino / atmega programs in the past, and worked with some of the jeelabs devices but I will certainly be needing assistance to build something as complex as this if it’s going to be robust enough to put “out in the field”. My hope is that developers will show a keen enough interest and we can build something as a community. The devices will be reprogrammable so new firmware can be flashed with relative ease. The problems will come when a hardware change is required…

Certification
Regardless of whether a device is faced with mains voltages or whether a device is aimed at developers I anticipate some form of certification being required- this could be tricky (especially on an evolving device).

Funding
To gauge interest, boost funding, promote the project and hopefully attract some developers, testers and contributors I would like to run a kickstarter project- unfortunately it’s a little chicken & egg as I need at least some form of prototype before I can reach out to the community. I have however drafted a project so I am prepared if I do get that far: http://www.kickstarter.com/projects/tickett/736265394?token=98a4e52f (so far just some notes, and the reward levels are pure guesswork).

I just knocked the artwork up from a few google images:

I have asked someone to design some artwork for a t-shirt, so I will see if they can come up with a cool concept :)

Where Next?
Yes, it’s far too early to be thinking about that, but I can’t help it!

  • Multi socket extension lead type device with individual socket switching and consumption monitoring
  • aSocket, essentially a mains socket with the device inside so no “plug” is required
  • Other plug types (I am based in the UK so this is where I intend to initially focus)

At this stage I’d appreciate any feedback, or expressions of interest etc

Happy new year to all

Lee

I blogged previously about replacing one of my switches with something a little smaller, quieter, lighter and greener: https://tickett.wordpress.com/2011/12/29/a-few-small-updates/ this was all part of a pretty big rewiring of the network and relocation of the A/V equipment.

All of the devices were in a cabinet in the corner of the living room:

But now I wanted to add the new switch and relocate into the utility room adjacent:

And re-run the wires a little differently (I’d previously used existing holes to get upstairs):

I’ve already pulled most of the equipment out of the cabinet and the cables just keep on coming:

The previous excess cable "neatly" spooled behind the cabinet:

Some hours later- a little progress:

Now upstairs. You can see the grey "conduit" I ran alongside the copper pipes with the existing cables:

Here’s the new hole in the ceiling:

And in the floor to allow cables to be pulled without lifting the floor:

Now the carpet’s back down and the cupboards are back in place:

First few lengths of Cat5e pulled through for 2 connections in the master bedroom:

Back downstairs, lots of velcro to tidy things up:

The comms cab starting to take shape (still a mess but I’ve still got a lot to do):

L

Structured CAT5e Network Cabling

I’ve been crimping my own patch leads for an eternity but never bothered introducing a patch panel. Now’s the time… (forgive the slightly poor quality pictures taken with the phone).

The back of the patch panel:

The 4 port RJ45 wall box and 4 cat5e cables. This is the first time I’ve used those velco tie-wraps and they work a treat (although I guess for inside the house depending on how well I hide the cabling, white would be preferable to black):

The excess / slack nicely spooled:

The patch panel patched into the switch:

This is in the garage (aka server room) where I’m just going to have 4 ports for the workbench. I’ve got a small cabinet in the house and a POE switch I’ve yet to hook up…

L

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