Hi,

and thanks.

First off I started from Cyberspice’s code so the largest part of php was already written. I didn’t know any php before and by just looking at the code I could easily add some variables and alter it to fit my needs.

The spikes in the graph are caused by using too many datapoints (and the way to represent them) and the ‘inacurracy’ of the temperature sensor. When a temperature of 19.4 degrees is measured the sensor will register anything from 19.0 to 19.8 over a period of time. A more correct way to get rid of the spikes is to do some more calculation and make the graph using exponential smoothing or moving average. This way the spikes will even out and the graph will become more fluent.

If you have any pachube stuff you would like to share, go ahead!

The files are stored on a local computer running an Apache web server (like XAMPP) or on your website running on a remote webserver.

‘newtemp.php’, ‘tempgraph.php’

Are these files being stored on the arduino’s memory or is it running on a standalone computer?

I’ve just started (not finished yet, hopefully out by April) a similar one that does the following:

- Arduino logs data
- A Processing win app graphs it and sends the data to
- http://www.pachube.com for online graphs // they do all the php stuff for me

Your project does it in a neater way. The only problem is I know nothing about php. :-(

p.s. any idea what caused all those mini spikes in your graph?

student scott from south africa

I have already build some simple things with an Arduino, but mostly with sample codes from other people. I am more a electronics guy, but I am gettitng some where with the code stuff. Wt some copy paste work I have made a Arduino to switch on the central heating of a house oer the internet. :) Now I am trying to also get the temprature information back. I am experimenting wit a LM35 temprature sensor, because the One Wire stuff is still al little to difficult.

But hey, the bst thing abouta Arduino is that you can always change it very fast and simple. So the next experimet wil be a 18S20 sensor.

I am very curious how the temprature differences are going to be with your next insulation project. I think the differencescan b very huge, fun to watch :)

What kind of Wifi shield are you going to use ? I still have everything with a cable… :(

Thanks for your time !

Remco ( The Netherlands)

I was planning on doing this myself when the winter kicks in. I’m renting a house which has double glazing except on 2 doors connecting a hallway. The amount of cold radiation coming from these glass surfaces is really huge. Last winter we found a cheap solution : putting heavy curtains in from of both doors. Thus creating an air buffer and blocking draft and cold radiation. I was positively surprised on the amount of cold it stopped from entering or rather heath it stopped from getting out.

This year I’m improving the insulation by adding a layer of bubblewrap over the glass leaving about an inch of air between the glass and the bubblewrap.

So it’s

outside ~~ |glass| ~~ |bubblewrap| ~~ |curtain| ~~ inside

I’ll be using 4 ds18B20′s to measure the Tout, Tin and the 2 temperatures in between and a wifi shield to send the data to a website.

Tout ~~ |glass| ~~ T1 ~~ |bubblewrap| ~~ T2 ~~ |curtain| ~~Tin

Here’s a howto on how to connect db18S20′s in series : link

Feel free to post links to your projects.

That would be handy.. :)

Just starting with the whole Arduino programming…..