Landis+Gyr E450 Encrypted smart meter data (STW Klagenfurt) #21359

andreas-doppelhofer · 2024-05-05T13:37:10Z

andreas-doppelhofer
May 5, 2024

Hi all, i got my smart meter a few days ago and already requested the "Kundenschnittstelle" from STW Klagenfurt.
The interface is now activated and the wired M-Bus interface running using M-BUS SLAVE CLICK and NODEMCU ESP32.
I compiled the firmware and applied it on the device and tried to setup everything to get data out.

Based on the description of STW the data (EN 13757-1: 2005 dlms/COSEM) should be encrypted (i have the key and decryption works, at least i have a output in the debug log)

I'm using following script to retrieve data, but the data is not correct. I get values but those are somehow not correct.

Tasmota script:

D 48
B
print Before senors
=>sensor53 r
tper=5
M 1
+1,16,r,0,2400,Haus
1,=so3,512
1,=so4,MY-KEY
1,=s06,5000
; Test some starting positions
1,020f01x309UUuuUUuu@1,Test,x,Test,0
1,020f01x310UUuuUUuu@1,Test,x,Test,0
1,020f01x311UUuuUUuu@1,Test,x,Test,0
1,020f01x312UUuuUUuu@1,Test,x,Test,0
1,020f01x313UUuuUUuu@1,Test,x,Test,0
1,020f01x314UUuuUUuu@1,Test,x,Test,0

Output of sensor53 d1
14:25:42.236 SML: decrypted block: 355 bytes

# formatted by a script of mine... #
02 0f 01 0f 02 04 12 00 28 09 06 00 08 19 09 00 ff
0f 02 12 00 00 02 04 12 00 28 09 06 00 08 19 09 00 ff
0f 01 12 00 00 02 04 12 00 01 09 06 00 00 60 01 00 ff
0f 02 12 00 00 02 04 12 00 08 09 06 00 00 01 00 00 ff
0f 02 12 00 00 02 04 12 00 03 09 06 01 00 01 07 00 ff
0f 02 12 00 00 02 04 12 00 03 09 06 01 00 02 07 00 ff
0f 02 12 00 00 02 04 12 00 03 09 06 01 00 01 08 00 ff
0f 02 12 00 00 02 04 12 00 03 09 06 01 00 02 08 00 ff
0f 02 12 00 00 02 04 12 00 03 09 06 01 00 03 07 00 ff
0f 02 12 00 00 02 04 12 00 03 09 06 01 00 04 07 00 ff
0f 02 12 00 00 02 04 12 00 03 09 06 01 00 03 08 00 ff
0f 02 12 00 00 02 04 12 00 03 09 06 01 00 04 08 00 ff
0f 02 12 00 00 02 04 12 00 03 09 06 01 00 1f 07 00 ff
0f 02 12 00 00 02 04 12 00 03 09 06 01 00 33 07 00 ff
0f 02 12 00 00 02 04 12 00 03 09 06 01 00 47 07 00 ff
0f 02 12 00 00 09 06 00 08 19 09 00 ff
09 08 36 38 33 33 38 33 30 31 09 0c 07 e8 05 05 07 13 2b 0a ff
80 00 80 06 00 00 01 42 06 00 00 00 00 06 00 06 96 5a 06 00 00 00 00 06 00 00 00 1c 06 00 00 00 40 06 00 03 d6 3e 06 00 00 08 7c 12 00 2a 12 00 55 12 00 2e 12 00 2e

I can find all available OBIS codes in the output (like 1.7.0, 1.8.0...) at the beginning (by converting from hex to DEC) but the data, most likely in the last 2 lines doesn't make sense. All other hex values above stays the same compared to the day before.
I was assuming 06 is the delimiter in the last 2 lines. But looks like this is not correct.

Any idea how to configure the filters in a correct way?

Thx Andi

andreas-doppelhofer · 2024-05-07T14:28:33Z

andreas-doppelhofer
May 7, 2024
Author

@gemu2015 as i saw a lot of request from your side in this bug #8790

Do you have an idea?

13 replies

fkroepfl May 17, 2024

Under certain circumstances, this service can also help a little and provide additional information, or?

https://tasmota-sml-parser.dicp.net/

andreas-doppelhofer May 21, 2024
Author

First success after some debugging! 😎

It is not possible to set an offset > 255 -> xsns_53_sml.ino
By changing this to uint16_t 🥳 FYI @gemu2015

@@ -2007,8 +2024,10 @@ void SML_Decode(uint8_t index) {
               } else {
                 mp++;
                 if (isdigit(*mp)) {
-                  uint8_t skip = strtol((char*)mp, (char**)&mp, 10);
+                  uint16_t skip = strtol((char*)mp, (char**)&mp, 10);
                   cp += skip;

Now i need to find time to get everything running....

andreas-doppelhofer May 23, 2024
Author

Sadly i just have 2 values in my stream which is valuable.

Current
Power consumption in total

Nothing more... Need to check with STW.

fkroepfl May 28, 2024

What do the specialists at Stadtwerke Klagenfurt have to say?

andreas-doppelhofer May 30, 2024
Author

Nothing, they do not really know how it should look like. They had configured the protocol a few years ago with Landis but do not really have a clue whats going on. I asked them for a protocol description but i haven't received anything yet.

fkroepfl · 2024-05-08T05:42:58Z

fkroepfl
May 8, 2024

The interface is now activated and the wired M-Bus interface running using M-BUS SLAVE CLICK and NODEMCU ESP32.

The Mbus interface has now also been activated on our E450 from STW/Energie Klagenfurt. I don't have a hardware adapter yet and am looking for the right components to work with the Tasmota Smart Meter feature.

Can you share your source of supply, interconnection and configuration of the components here?

1 reply

andreas-doppelhofer May 8, 2024
Author

I will do if i have a working one...

fkroepfl · 2024-05-28T16:13:23Z

fkroepfl
May 28, 2024

I can currently receive the following data telegrams from the „Kundenschnittstelle (Mbus)" of our "STW Klagenfurt" meter. (see screenshot)

@andreas-doppelhofer:

Do the data telegrams correspond to the ones you are receiving?
Do you already know what the data telegram structure of the "STW Klagenfurt" looks like?

18 replies

andreas-doppelhofer May 31, 2024
Author

Just for reference, I opened a PR for setting uint16_t as default. see #21535

fkroepfl May 31, 2024

Can you provide the decrypted data in plaintext (like the one in your first screenshot)? Then it's easier to feed my script for checking the offset.

Does this work for you?

SML: decrypted block: 355 bytes	OBIS Register;Index	description	unit	alias
020f010f
020412002809060008190900ff0f02120000	0-8:25.9.0;2
020412002809060008190900ff0f01120000	0-8:25.9.0;1
020412000109060000600100ff0f02120000	0-0:96.1.0;2
020412000809060000010000ff0f02120000	0-0:1.0.0;2
020412000309060100010700ff0f02120000	1-0:1.7.0;2
020412000309060100020700ff0f02120000	1-0:2.7.0;2
020412000309060100010800ff0f02120000	1-0:1.8.0;2
020412000309060100020800ff0f02120000	1-0:2.8.0;2
020412000309060100030700ff0f02120000	1-0:3.7.0;2
020412000309060100040700ff0f02120000	1-0:4.7.0;2
020412000309060100030800ff0f02120000	1-0:3.8.0;2
020412000309060100040800ff0f02120000	1-0:4.8.0;2
0204120003090601001f0700ff0f02120000	1-0:31.7.0;2
020412000309060100330700ff0f02120000	1-0:51.7.0;2
020412000309060100470700ff0f02120000	1-0:71.7.0;2
09060008190900ff	0-8:25.9.0	List of pushed objects
09083632383534323235	0-0:96.1.0	Meter serial number
090c07e8051c020e0523ff800080	0-0:1.0.0	Meter date & time
060000074a	1-0:1.7.0	Positive active instantaneous power	kW	P+
0600000000	1-0:2.7.0	Negative active instantaneous power	kW	P-
0600bb1951	1-0:1.8.0	Positive active energy, total	kWh	A+
06001bf3db	1-0:2.8.0	Negative active energy, total	kWh	A-
0600000202	1-0:3.7.0	Positive reactive instantaneous power	kW	P+
0600000000	1-0:4.7.0	Negative reactive instantaneous power	kW	P-
06004cea5a	1-0:3.8.0	Positive reactive energy, total	kvarh	Q+
06000fb2ab	1-0:4.8.0	Negative reactive energy, total	kvarh	Q-
1200ae	1-0:31.7.0	Instantaneous current in phase I	A	I (L1)
1200c2	1-0:51.7.0	Instantaneous current in phase II	A	I (L2)
1201f5	1-0:71.7.0	Instantaneous current in phase III	A	I (L3)
1201f5

dops-at May 31, 2024

Just this as plain text, would be fine...

fkroepfl May 31, 2024

Plain enough? 😉

020f010f
020412002809060008190900ff0f02120000
020412002809060008190900ff0f01120000
020412000109060000600100ff0f02120000
020412000809060000010000ff0f02120000
020412000309060100010700ff0f02120000
020412000309060100020700ff0f02120000
020412000309060100010800ff0f02120000
020412000309060100020800ff0f02120000
020412000309060100030700ff0f02120000
020412000309060100040700ff0f02120000
020412000309060100030800ff0f02120000
020412000309060100040800ff0f02120000
0204120003090601001f0700ff0f02120000
020412000309060100330700ff0f02120000
020412000309060100470700ff0f02120000
09060008190900ff
09083632383534323235
090c07e8051c020e0523ff800080
060000074a
0600000000
0600bb1951
06001bf3db
0600000202
0600000000
06004cea5a
06000fb2ab
1200ae
1200c2
1201f5
1201f5

andreas-doppelhofer May 31, 2024
Author

As far as i can see the offset is the same as on my smart meter. So my script example above should work.

Noschvie · 2024-05-29T10:50:21Z

Noschvie
May 29, 2024

Did you have a look to Tasmota SML decoder ?

1 reply

fkroepfl May 29, 2024

Yes, but apparently this tool cannot do anything with this data telegram or decode parts of it.
Would have been too nice and easy 😉

HofeBY · 2024-06-02T16:30:10Z

HofeBY
Jun 2, 2024

@fkroepfl
https://github.com/HofeBY/Tasmota-Firmware

New Version ESP32 with STW-Klagenfurt patch uploded.
Also ESP32 RULE with MATTER .

Read Liesmich-zuerst.txt to build with new files for own builds .

HofeBY

3 replies

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Landis+Gyr E450 Encrypted smart meter data (STW Klagenfurt) #21359

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Landis+Gyr E450 Encrypted smart meter data (STW Klagenfurt) #21359

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