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Author Archive for: ‘chris’

Node 0

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I spent a couple of hours in the loft at the weekend mounting my rack mount server (at last) and tidying up some cables. I thought this might be a good opportunity to talk a little about my ‘Node 0′. Located in the loft I have a 12U wall mounted rack. In this rack I have a 24 way patch …

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Monitoring temperatures using FHEM, RRDTool, PHP & JavaScript

My Household Temperature Graphs page displays various statistics from my heating system. In this post, I explain how I produce these graphs using a combination of FHEM, PHP and RRDTool. The heating system is based on a number of these Conrad FHT 80 BTFN sets. The programmer controls the actuator via 868Mhz RF and the signal is received by an …

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Household Temperature Graphs Updated

I have updated the page showing my household temperature graphs. Previously I was logging data to the cloud using Pachube and while this works well, the tools available for graphing the information are not great. As the number of readings increased, the tools I was using to render the graphs became slower and slower. What’s more the graphs used flash …

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Netflix UK on Wii – Quick Review

I’ve recently taken a free trial from Netflix UK with the intention of evaluating it as a replacement for Sky Movies. In this review, I note whether it is a capable replacement for Sky Movies. This review focuses on Netflix UK (because that’s where I am). I have no experience and cannot comment on Netflix US. I have a couple …

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Fourth LightwaveRF Dimmer and Good News on LEDs

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#I have just fitted my fourth Lightwave RF dimmer.  This time in the living room and on the same fitting as the one I have recently replaced with LED lamps.  The dimmer works fine as I would expect and is actually much better than the home easy dimmer it replaced.  The LED lamps dim much lower than they did with …

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Update on hammering TRV – 2

I spent some time yesterday clearing my garage a bit. While doing so, I found the original head to the new TRV I’ve had fitted to my bedroom radiator. Previous visitors will be aware from here and here that the TRV was sounding like a jack hammer. My plumber thinks this is due to the radio controlled actuators I have …

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DemoPad controlling LightwaveRF

Its the wee small hours and I really should be in bed but I have just installed DemoPad on my iPhone (and iPad) and been playing with trying to get it to control my LightwaveRF installation. It works! What I needed to do was find out the actual IP address of my LightwaveRF WiFi Link (because DemoPad doesn’t currently support …

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New telephone system

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I now have a full Voice Over IP setup at home that I am happy with. I will blog technical details later, but I wanted to put something up about what I have. At the core of the system is a Trixbox virtual machine running on my VMWare VSphere server in the loft. I currently have four handsets connected to …

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GU10 LEDs – First Impressions

Its been a while since I posted something and today I have reason to correct that. I have just taken delivery and fitted what I hope is the first of many LED lamps. After much research, I decided to take a punt on these: http://www.ledhut.co.uk/spot-lights/gu10-led-bulbs/gu10-smd-led-220-lumens-45-watts-equiv-best-internet-price.html Despite the URL, these claim to be 50 Watt equivalent 320 Lumen GU10s running at …

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Cloud Logging

I have been playing with logging this week. FHEM now automatically records the measured temperature, the desired temperature (set point) and actuator levels for each room to Pachube.com (pronounced Patch Bay). With the data held on Pachube, I can do various things like build dynamic graphs for display on this site.  At the moment, I am using a Pachube app which …

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