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I use a CM119 - http://www.amazon.co.uk/Owl-Cm119-Wireless-Electricity-Monitor/dp/B001JJCLS0 I had to modify mine to extend the range (it lives in the cellar) and the device doesn't measure the mains voltage so the results are inaccurate and of course it doesn't measure gas at all. Hopefully somebod...

All five of my MS13s send an X10 off at dawn and on at dusk!
Steve

The X10 motion sensor MS13 will tell you roughly when it's dusk or dawn but that's about it as far as I know. You are probably going to have to make your own.

Steve

Look at the number of manual controls. More than 256, so that rules out X10!

They're supposed to have an accuracy of 0.5C, so yes, 1.8C is a bit too far apart.

Are your temperature sensors calibrated?

I've noticed that if you read them frequently, the temperature can go up a tiny bit.


Steve

What size of objects can it follow / does it react to? It can certainly detect the reflection from something 1cm x 1cm at a distance of over a metre. The maximum distance I've seen so far is just under 4 metres. I'm currently doing a sonar ping every four seconds but I could do it a lot more often;...

I've got one of these robot-electronics.co.uk/acatalog/Ultras ... ngers.html abd I've put it on a pan-tilt camera connected though a PIC to my system.

It works just fine, I'm just not quite sure what to do with it now - if I can't think of anything, I'll just add some more different sensors!

Steve

There's BEREC http://www.erg.eu.int/ but I don't know if they've actually done anything yet!

Steve

There is certainly one FTDI parameter which has changed in the last few kernel revisions. The FTDI serial devices have an adjustable receive buffer timeout exposed in the /sys filesystem (whatever/ttyUSBx/latency_timer) which used to be set to 16ms by default. The last few kernels have it set to 1ms...

It's good to change MS13 batteries before they are empty; otherwise they start jamming everything! This started to happen to one of mine this morning, it's repeatedly sending its motion code and making it difficult for anything else on 433MHz to get though. I would much rather it just stopped trans...

I have 14 1-wire devices on two 1-wire networks using DS2490 USB bus masters. I have temperature sensors in every room but they are just shrink-wrapped and hidden at the edge of the carpet. All the sensors are in parallel, so I guess that's a star network!

Steve

In my case i use an RF based system, often an order could be missed due to collisions. This order can be an important order when i control a heating system for example. I use RF too, with 4 different protocols on 433MHz. I have an RFXCOM receiver permanently listening. The system knows what it's tr...

The Linux kernel currently doesn't have support for a 2405 slave, though it's probably a simple one to add (I've done the 2450 and 2438), so it looks like OWFS is the way to go. I've not tried it, can you just 'cat' a file to read the 1-wire device registers, or do you need an OWFS application to do...

There is support for some 1-wire devices in the Linux kernel, here are some of mine: /sys/bus/w1/devices/20-0000000dcfb7 /sys/bus/w1/devices/26-000000cbd8e8 /sys/bus/w1/devices/28-00000154b806 /sys/bus/w1/devices/28-0000023a5c77 /sys/bus/w1/devices/81-000000295bd1 /sys/bus/w1/devices/w1 bus master T...