Watermeter - DIEHL IZAR RC I R4 - How to do?

Hardware
41

Hi Petsie.
Good news. I got it runing and it displays values. Reason: My watermeter Id does not correspond to the meter id shown on the lid as I assume should. It took some time to realize. I could verify the readings of the meter shown in the first test with meter id “0”. Nevertheless there is one thing. Are your readings correct? My displayed values in ESP32 differ slightly from the values shown on my meter. Do I have to add an offset or should the readings exactly the same?
thanks again for your support
oferl

42

Yes.

But you can check yours:

[17:16:55][D][wmbus:182]: Meter ID [0x86120778] RSSI: -66 dBm LQI: 128 Frame: T1 A not found in configuration T: 1944A511780712860524A2211400133E2C674681146270871622 (26)
[17:17:03][V][rxLoop:167]: Have 45 bytes from CC1101 Rx, RSSI: -70 dBm LQI: 128
[17:17:03][D][mbus:034]: Processing T1 A frame
[17:17:03][V][mbus:045]: Frame: 36571C99934D4EC59334EB1A59939CD23C5C98E2CD35C59634B2F22E372C5A93A62D98CD9A56745A9396D294E5 (45) [RAW]

[17:17:03][V][mbus:052]: Frame: 1944A511780712860524CBD4A2311400133E3B480F2A35B1A95C0F20CF79 (30) [with CRC]

Take the frame value from the log and check this with:

https://wmbusmeters.org/analyze/1944A511780712860524CBD4A2311400133E3B480F2A35B1A95C0F20CF79

If you have the results are the same as with ESP32 all is .o.k
If not there is as problem with the wmbusmeter component.

But in this case only Szczepan Leon/esphome can help you.

https://github.com/SzczepanLeon/esphome-components
43

Hi petsie.
I checked twice. My actuall readings are slightliy different as my water meter is showing.
Maybe Leon can give me some hints. Thanks for your support.
oferl

44

Hi, I have the same problem. Did you actually talk to someone technical at ST, or was it someone who had no idea what you were talking about? Just wondering whether it is worth my while contacting them…

45

Only via email. It’s been a while now, so might be worth another try!

46

Just contacted them and got the same (negative) response. They did however say that they are swapping out the izar meters for “smart” meters, so if that happens it will be possible to monitor consumption from their portal (I presume).