Getting data from Voltcraft Energy Count 3000 on your computer

NOTE: this is not a yet a complete howto article, I just mention what can be achieved with this nice gadget and refer to some interesting information about this product.

Conrad sells a nice little gadget: the Voltcraft Energy Count 3000 that enables you to monitor the energy usage of up to 10 individual devices. The package contains 2 “power monitors” and a little remote receiver that enables you to “pair” with individual “power monitors”. You can also buy individual power monitors or a set of 3 extra power monitors. These devices are also sold under the brand name Velleman (type NETBESEM4) and “La Crosse Techology Remote Cost Control Monitor” (type RS3620).

After a power monitor is paired you can receive and display data from it. The data that is shown is:

  • The current power usage (in Watts)
  • The maximum usage of the device (in Watts) since the start of the measurements
  • The total cost since the start of the measurement
  • The cost per month based on the total power usage since the start of the measurements
  • The total energy usage (in Wh) since start of the measurements
  • The time that the device was ‘on’
  • The total time since the start of the measurements
  • The ID for each power monitor so that you can identify which power monitor belongs to what “channel”

For reliably determining the total cost you need to first set a “tariff”.

Besides reading out the data using the little remote receiver you can also use a  RTL-SDR supported radio receiver and the GNU Radio software defined radio framework for this. The following links refer to usefull information:

To use the software you first need to install the gnuradio framework and the gr-osmosdr package

  • TODO
  • sudo apt-get install gr-osmosdr

After all preconditions have been met you can install and test the software:

  • git clone git://
  • cd ec3k
  • sudo python install
  • python test

Installing gnuradio and gr-osmosdr using the default package installation for your release may result in issues. You may want to build gnuradio from source as described here.