read out water/energy consumption

---

since 4 days i try to get the pimatic-emon thing. see here: http://forum.pimatic.org/topic/766/emon-plugin-how-to

now i will ask you guys, what are you using to get/log this information. i have the old ferraris and the old waterclock.
thanks for your help

For my old ferraris energy meter I used an arduino and TCRT5000 the read out the USB to a log file.
Here is a site in dutch http://juerd.nl/site.plp/kwh and my git https://github.com/incmve/kWh
I printed a plate to hold it in place

http://www.thingiverse.com/thing:680792

Sensor might also work on the water meter http://www.mysensors.org/build/pulse_water

ah ok, could you make a little tutorial for the kwh meter? were to set the pulses, eg 375U/kWh in my case.
were to find the arduino sketch, the one from the site looks incomplete.

that would be very nice

got it working, but in wich files are the watts and kWh. saved so i can read these logs in pimatic

ok with this:

rrdtool lastupdate /home/pi/kWh/kWh.rrd | tail -1 | cut -d ':' -f 2 | cut -d ' ' -f 2

i can get the last kWh from the database, but where can i find the total kWh ?

this:

rrdtool lastupdate /home/pi/kWh/kWh.rrd 

gives me somehing like that:

 kWh

1439403658: 1493.04

where the second number is the Watts. any ideas ?

tbh I only used it for a few days then I got an new digital meter installed.
I used create-png to generate graphs and the HTML file to display the vallues.
I think you can use rrdxport or rrddump to export the DB but I’m not sure, maybe instead of writing to the rrd db you could addapt it to write to log file?