1.7 KiB
wmbusmeters
The program receives and decodes C1 telegrams (using the wireless mbus protocol) to acquire utility meter readings. You configure multiple meters for reading by supplying triplets on the command line.
wmbusmeters [usbdevice] [meter_name] [meter_id] [meter_ke]
If you want to listen to more than one meter, simply add more triples.
Builds and runs on GNU/Linux:
make
./build/wmbusmeters /dev/ttyUSB0 MyTapWater 12345678 00112233445566778899AABBCCDDEEFF
./build/wmbusmeters --verbose /dev/ttyUSB0 MyTapWater 12345678 00112233445566778899AABBCCDDEEFF
make HOST=arm
./build_arm/wmbusmeters /dev/ttyUSB0 MyTapWater 12345678 00112233445566778899AABBCCDDEEFF
make DEBUG=true
./build_debug/wmbusmeters /dev/ttyUSB0 MyTapWater 12345678 00112233445566778899AABBCCDDEEFF
make DEBUG=true HOST=arm
./build_arm_debug/wmbusmeters /dev/ttyUSB0 MyTapWater 12345678 00112233445566778899AABBCCDDEEFF
(After you insert the im871A USB stick, do:
chown me:me /dev/ttyUSB0
to avoid having to run the program as root.)
Currently only supports the USB stick receiver im871A and the water meter Multical21. The source code is modular and it should be relatively straightforward to add more receivers (Amber anyone?) and meters.
Good documents on the wireless mbus protocol:
https://www.infineon.com/dgdl/TDA5340_AN_WMBus_v1.0.pdf
http://fastforward.ag/downloads/docu/FAST_EnergyCam-Protocol-wirelessMBUS.pdf
The AES source code is copied from:
https://github.com/kokke/tiny-AES128-C
The following two other github projects were of great help:
https://github.com/ffcrg/ecpiww
https://github.com/tobiasrask/wmbus-client
Code can print total water consumption! But everything else is missing. CRC checks anyone? :-) Don't rely on these measurements for anything really important!