https://github.com/argilo/gr-elster

A GNU Radio block that decodes packets transmitted by Elster R2S smart meters
https://github.com/argilo/gr-elster

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A GNU Radio block that decodes packets transmitted by Elster R2S smart meters

• Host: GitHub
• URL: https://github.com/argilo/gr-elster
• Owner: argilo
• License: gpl-3.0
• Created: 2013-12-21T13:20:03.000Z (over 12 years ago)
• Default Branch: master
• Last Pushed: 2024-02-22T21:15:30.000Z (over 2 years ago)
• Last Synced: 2025-01-29T17:23:03.045Z (over 1 year ago)
• Topics: hacktoberfest
• Language: CMake
• Homepage:
• Size: 254 KB
• Stars: 129
• Watchers: 22
• Forks: 16
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • License: COPYING

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README

          
gr-elster

=========

Author: Clayton Smith  

Email: 

This GNU Radio block and sample flow graph are intended to receive

packets transmitted by Elster smart meters on the 902-928 MHz band.  In

particular, I have tested it with the Elster R2S hydro meters used in the

Ottawa area.  It may work with other Elster meters.  Please let me know

what you manage to receive with it.

It is not yet complete, as I have not fully reverse engineered the packet

structure, nor the payload data.  But it is able to dump complete

packets, and can display meter readings and hourly electricity usage

data.  When running, it dumps all packets to the console in hex, and

decodes those packets containing meter readings as follows:

    Meter reading for meter #XXXXXXX: YYYYY kWh

    Hourly readings: Z.ZZ, Z.ZZ, Z.ZZ, Z.ZZ, Z.ZZ, Z.ZZ

It also stores packets to a pcap file (beginning with elster-001.pcap)

which can then be decoded using the decode_pcap.py script.

In my area, usage data is transmitted every six hours (beginning at

05:30, 11:30, 17:30 and 23:30 UTC), so it may be necessary to wait a

while before such packets will appear.

The flow graph in /apps/elster_rx_multi.grc is intended for use with an

RTL-SDR dongle, but can likely be used with other SDR receivers as well.

It receives six out of the 25 frequency-hopping channels used in my area,

but that should be sufficient to receive most traffic since packets are

repeated a few times on different channels.  The number of simultaneous

channels is limited by the bandwidth of the SDR.  An RTL-SDR dongle can

reliably receive up to about 2.4 MHz, which is sufficient for six 400-kHz

channels.

For best reception with an RTL-SDR dongle, set the frequency correction

slider to the appropriate value (in PPM) for your particular tuner.

Build instructions:

    mkdir build

    cd build

    cmake ../

    make

    sudo make install

After following the build instructions, be sure to restart GNU Radio

Companion so that the new block will be available there.

Any help you can offer with reverse engineering or coding would be

greatly appreciated!