First of all i like to thank all of u for the information i found here. It saved me some time getting the thing to work.
Ill write in short what we did but i can tell it works now
. We have a kamstrup 382 from enexis (Netherlands). It's installed in our home since Q3-2011 (don't know exactly when at the moment).
My father did the hardware and i wrote the software. We first tried to get some data out of the P1 port. It took us some time to find out how and when data was sent from the smart meter. My father made a serial cable for this (we did not buy one). After we got the terminal to work thanks to the information in verkenners post (Terminal settings: 9k6, 7databits, Even par, stop=1, No handshaking, Line mode, CR+LF). We hooked the meter to a arduino board with ethernet shield. I programmed the device to parse the information from out meter and send it via HTTP request to a server. The data is put into in mysql database on the server. I used http://code.google.com/p/flot/
to make some auto-refreshing graphs. Thats currently what we have. The webpage is still a bit quick and dirty but it works.
Advantage of using arduino is that it only uses a few watts of power. For my experience and embedded device like a arduino is more stable on a serial port that a computer/server/router. The disadvantage is that your storage is external for now. (It could be that someones could see the data). Of couse if u run a homeserver this is not a real problem (u can request directly your home server). But if someone wants to we could try to change it to write the data to the SD-card default on a ethernet shield.
I am willing to make my project available if someone is willing to test/use/help with it. This means getting an arduino (if ur not already have one) and try it (preferably with ethernet shield). This would require your to solder a bit to make a connector on the arduino bord to connect it to your meter. And currently the parser in the board is not very advanced. It will most likely not work directly on a other meter as for now the parser is a bit quick and dirty. But if someone is willing to try it let me know here. Else ill wait with publishing until i get time to clean up most of the code.
For connecting the meter i could ask my father to make a diagram on how to connect it. But i can't promise that
Let me know if u like to know something or have any other questions ill will get a notification when a replay will be posted here.