GitHub - Tooblippe/Energy_Logger: This is my attempt to build a small home based energy logger. It is not unique but has an RF12 on board so it can integrate with other systems, and it logs data to a OpenLog unit. This makes changing SD cards and logging a breeze It is based on OpenEnergyMonitor Many of these projects have been done all around the world. I think what makes this one unique is the fact that the sensor unit (the arduino with the CT) has a RF12 radio built in and also an Openlog unit from Sparkfun. The OpenLog unit is connected to the UART of the sensor unit. Full control off the Openlog can be obtained via the remote unit connected via RF12 radio.This means that the sensor unit can keep on logging to the Openlog. You can remotely initiate a session with the Openlog from the base station, and make changes to the settings, before putting it back in logging mode.

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This is my attempt to build a small home based energy logger. It is not unique but has an RF12 on board so it can integrate with other systems, and it logs data to a OpenLog unit. This makes changing SD cards and logging a breeze It is based on OpenEnergyMonitor Many of these projects have been done all around the world. I think what makes this …

github.com/tooblippe/energy_logger/wiki

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/*
  Arduino based RF12 enabled energy logger
  Created by Tobie Nortje, tobie.nortje@navitas.co.za
  http://navitas.co.za/tobienortje/
  https://github.com/Tooblippe/Energy_Logger/wiki
  GNU GPL
*/

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Project components
1 or 2 arduinos with or without an RF 12 radio
1 x OpenLog unit connected to UART of sensor - for logging data - https://github.com/nseidle/OpenLog/wiki
1 x 100 AMP CT
1st arduino with CT logs energy and send via RF12 radio and serial
2nd arduino receives RF12 signal and send value via serial port
This software can read eiter, or both if ran on seperate computers or ports
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Function
Listens to serial port at port number = port at baud = baud
Arduino only sents one value every couple of seconds.
This code should be able to read the sensor board and the client board.
Do with the code what you want. \n
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File format : logs to csv in DATE, TIME, POWER
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Arduino UNO - connected current probe and RF12 Radio
Current probe - 100A, SCT-013-00, order from NETRAM - http://www.netram.co.za/Sensors/Non-invasive-AC-current-sensor-100A.html
Current probe - http://www.seeedstudio.com/depot/noninvasive-ac-current-sensor-100a-max-p-547.html
Current probe - bias resistors 2x10kOhm and 10uF Capacitor. Burden Resistor - 56 OHMS (used 6 330 OHM in parralel )
Current probe - more info at - http://openenergymonitor.org/emon/node/28
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RF 12 radio connected via SPI - all my notes here - https://github.com/Tooblippe/Energy_Logger/wiki

Note on RF12 and soldering iron. I found that my soldering iron interfered with the RF12 radio...
--must be that I have a cheap soldering iron, and the rectifier must be producing plenty noise.
--when switched off in close proximity the circuit works fine...nothing the other way around.... 
--my first experience with EMC! :)

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