firestar

Hi Paul,

Thanks for your comments. The double PCB is standard in Fritzing (in what I started out with) so I went with that for now. However since Fritzing is giving me some small issues i'm thinking about switching to the free version of Eagle and use something like Seeedstudio for the PCBs (as it will give me a few PCBs for the same price, so if I mess up one with soldering).

I checked the IC datasheet to make sure but they dont put the requirements out there, it is a simple eeprom. However I'm thinking if I shouldnt add a 10 and 100 nF cap to the incoming power supply to the board just to make it nice

I'm still thinking if I should make a shield (clip on) or just a seperate PCB with a few wire jumpers. That will allow me to mount the RJ connector nicely in a case.

Thanks.

Martin

Hi,

I just modified my code to read per byte. Makes it easier to find starting and ending characters in the telegram as well.

The reason for the inverter is that the spec of the meter mentions SPACE > 4V and MARK = 0V. Because they use an opto on their side.

I will test some later today and see if that fixes anything.

Very nice!

I'm doing something similar (in C# though). I'm using a FET as inverter for the RX signal. Hopefully I can test my setup in the coming days to see if it all works, I have completed most code so its a matter of debugging :-)

Now I just need to find a suitable home automation system to log the data too :-) Too bad there arent any big open source projects on .NET going on for this :-(