Replies: 16 comments 32 replies
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Excellent news! I have one of those meters in denmark. Our grid company name is Veksel. Let me know if you need further testers or when it's released for purchase. 👍 |
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Thank you for letting me know regarding Veksel, I'll update the posting with that. 👍 I'll notify here if we need more testers! |
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That sounds very promising! I volunteer as a tester in Austria - if needed. |
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If we have understood the situation correctly, all Omnipower can be configured for Data push. The problem is sometimes that the grid company do not have access to the remote config service (maybe a cost question). We have two customers with small grid companies in Switzerland (I do not know which model Omnipower) where the grid company sent a technician to reconfigure via the optical port, using a laptop with the necessary device on a cable. |
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Hi, it looks like we have the same issue. I am also struggling to receive data from my omnipower smartmeter. |
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If you post a photo of the meter, I'll help you identify it. |
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This it my meter. |
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This is a normal Kamstrup Omnipower meter, and you are in Austria with https://www.kwg.at/ I have just finished a discussion with an other KWG-customer in Austria that struggled to get his meter to deliver data.
And he now has everything up and running. Number 2) is important, as it seems like KWG has previously proposed Smart-Me units to use on these meters, and we think they then configured the meters for "Data pull". I believe Smart-Me no longer sells outside of Switzerland, so it is a bit strange that KWG still advertise that solution. Anyway - please contact KWG with the indicated request. |
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This meter is also in use in Finland (at least here in the southern part). Can also try to do some testing if needed. |
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Hi @straend , that is interesting information! Thank you for volunteering to test, we will start working with two persons in Denmark - and maybe extend the number of testers later on. |
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Good to hear, hoping it goes well. This is the meter we have. |
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Hi im using the same 382mxg kampstrup and is also Home assistant user. I am on the N1 grid |
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Hi @kennethslot : So since you ask: N1.dk also has 382M meters. I visited their website this morning to check if they use 382M meters, and from this page I only see Omnipower (when I click the button in teh Kamstrup field). https://n1.dk/elnettet/elmaaler But that apparently does not tell the full story. |
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Thank you for letting us know, @kennethslot ! |
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I'm wondering - is there any progress on this topic? |
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Slow progress due to recent workload with release and following patching of v2.3. Two testers in Denmark are equipped with boards - and the initial attempts to communicate with their meters have been done. |
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We have made great progress lately! There are some minor issues left to sort out, so we are not yet ready to release the code - but we're getting very close. |
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Will this also work with newer Kamstrup meters if Push is not active? |
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Thank you for asking - as this is a good question. In principle Yes, but we would like to check available information first, and then have a "pilot customer" to try it before we announce that we can support it. Most grid companies can reconfigure Kamstrup Omnipower meters to Data push if you ask them, but we know that not all small grid companies have that ability.
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We already talked about this in this issue thread: #126 (comment) see above for picture. Yes, Austria. My local energy provider was not able to answer any questions regarding encryption. I wrote to [email protected] and received answers from [email protected] that with the current firmware push is not available and will not be as an upgrade is not possible. There is no technical information on my grid companies homepage concerning the smart meter. |
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💡 Sorry for not having recognized you! I tried now on my Omnipower the test firmware currently running on the 382M test subjects in Denmark. But it does NOT run on my Omnipower. It should absolutely be possible, but apparently not in the same way as on the 382M. We will finalize the coding for 382M first, then see if we gan get through also on Omnipower meters. |
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I follow this thread too, since I'm at the same position. And I have a very early 684-xxx model too (not a 382M as previously thought). I requested again the GPK11 key at my small energy provider - my contact there will forward the request to Kamstrup (Kamstrup Austria I guess). |
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Thats great. Looking forward to purchasing an board with the support.Den 4. jun. 2024 kl. 13.20 skrev ArnieO ***@***.***>:
Ping @chmadkk
—Reply to this email directly, view it on GitHub, or unsubscribe.You are receiving this because you were mentioned.Message ID: ***@***.***>
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Nice to see this finally being integrated into this project :) |
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If you would like to test this feature, Install version below, go to Configuration -> Meter -> Communication and select KMP. Then set baud and parity, most likely 9600 8N1 esp32s3.zip |
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Hi |
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I see now that the firmware for vanilla esp32 is larger than the standard partition size, so it makes sense that it wont run. Will look into options at some point. |
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Hi everyone, |
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Thank you for encouraging words! The key to making this work is using the proprietary Kamstrup KMP protocol to communicate with the meter, basically requesting all parameters one by one ("data pull"). As this is a proprietary protocol, we have signed an NDA (Non-disclosure agreement) with Kamstrup regarding its use. Under the clauses of that NDA, we cannot publish the source code for the KMP sections of our code. This creates some extra work for us, as we want to include it as part of the code (published on this Github site) - and not a separate non-published version. The KMP part of the code must be published as binary; not source code. This means extra work before we can release the new version of the code that supports Kamstrup 382M. However |
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HI But I'm looking forward to seeing it work on AMSreader.. |
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I don't think we can expect the average grid company to have that level of technical knowledge regarding the power meters, especially the small grid companies. We have worked on our hardware and firmware for several years, and have managed to find a technical contact at Kamstrup that knows his stuff - which is why we know both what the issue is and found a way to get around it by using the proprietary KMP protocol. The core difficulty is that the 382M cannot be reconfigured to "Data Push" mode. The Omnipower can be configured to "Data Push" either remotely or on-site via the optical port. "Data Push" mode is when the meter sends a "datagram" (containing a predefined set of parameters) by itself every x seconds (10 seconds for the Kamstrup Omnipower). The alternative is "Data pull", where you establish a bidirectional communication with the meter, and request the various parameters one by one. Which is significantly more challenging in the firmware, as you need to understand and implement the handshake protocol. Before signing NDA with Kamstrup to be allowed to use KMP, we attempted to get around it by using the open DLMS protocol. But it turned out that there is a password needed to get out anything but trivial information. And that password is not something the grid company has easily available. So we had to abandon that path - and went for Kamstrup KMP. Then there was of course the additional challenge that we (working out of Norway) do not to have direct access to a 382M meter. So we allied with helpers in Denmark that received prototype boards modified to be like the board version we're currently selling. They have received numerous versions of test firmware, until it is now working as it should. We now have to find a way to publish source code for the rest of the code, while "hiding" the source code for KMP - and still make it feasible for a hobbyist in Denmark to compile the code for hers/his power meter. It is fully feasible, we just have to find the best way to do it - now that we have working code up and running. |
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Just ordered! So glad I came across this. Was looking into it back in Jan 2023, and didn't want the optical eye measuring set up. Today I thought I'd give in, and then find this amazing progress 👍 Looking forward to setting it up. |
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After receiving a PowK+ for my Kamstrup 382m meter I finally are able to get data from the meter. |
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Excellent - and please spread the word around you! We have contacted the grid companies in Denmark that use 382M, but they all say that due to their monopolist role they cannot post information about our solution on their web site - which means we need some help to spread the information. |
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Still no possibility to release a precompiled software with kmp support ? And keeping out on releasing the Source code ?
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That should absolutely be possible - when @gskjold gets an opportunity. Might take a bit of time right now due to vacation. Which micro controller? |
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Esp32 standard. Or similar.
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Hi Arnie
I think that alle new installations uses the omnipower, but mine is 382m
meter.
Den tirs. 4. jun. 2024 kl. 15.57 skrev ArnieO ***@***.***>:
… Hi @kennethslot <https://github.com/kennethslot> : So since you ask:
N1.dk also has 382M meters.
That is an interesting reminder, as this is a large grid company covering
a large part of Jylland.
I visited their website this morning to check if they use 382M meters, and
from this page I only see Omnipower (when I click the button in teh
Kamstrup field). https://n1.dk/elnettet/elmaaler
But that apparently does not tell the full story.
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Hi @kennethslot, |
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Here is the latest build that includes KMP support: Note that vanilla ESP32 and ESP32-C3 have been compiled with a custom partition table. If you are upgrading from a previous installation you should back up config and do a full flash including the partitions.bin file. |
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Can report that it works here in Finland. |
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esp8266 with Software Serial was not fast enough for the parsing |
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So there are Kamstrup 382M meters installed in Finland? That is interesting to know. Which grid company is this?
Good to know, thank you for that information. |
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In this case its Keravan Energia |
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Yes, I find Kamstrup 382M among their user manuals for power meters: |
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For some time now we have been working on finding a way to read Kamstrup 382M meters. This thread will provide information on the status and progress on that work.
Our Pow-K can read data from all Kamstrup Omnipower meters, that can be configured to send data to the HAN port every 10 seconds:
A number of users in Denmark have an older type Kamstrup meters that cannot be configured to push data to the HAN-port, this seems to be mainly the Kamstrup 382M models:
We do not have full overview which grid companies in Denmark use the 382M models, we know of these:
Please respond in this thread if you have a Kamstrup 382M with a different grid company.
In order to read data from the 382M model, the connected equipment needs to establish communication with the meter and actively request it to send data, i.e. do a "data pull". The protocol used for establishing such communication is a Kamstrup proprietary protocol, called "KMP protocol".
As we are dedicated to keeping our firmware code available to our users, we have over the last months had a discussion with Kamstrup on how to implement the "Data pull" and still publish the source code. The conclusion was that in order to obtain access to the documentation for the KMP protocol, we would need to sign a Non-Disclosure Agreement (NDA), where we commit to not publishing source code.
So we looked for a workaround. Using the (non-proprietary) DLMS protocol seemed to be a promising alternative. However, after testing that for a while we saw that in order to access the actual measurement data, a special DMLS encryption key is needed, which is not the encryption key the grid companies can provide to their customers. So using DLMS turned out to be a dead end: It was Back to square one!
We then figured that the "second best" solution will be to use the KMP protocol, but publish our code in such a way that the code pieces where the KMP protocol is implemented is only published as binary - and then assembled into the binary file in some way during the code build. Please note that I am not the one in our team that knows the details about this, so the explanation may be slightly inaccurate. But the point is that we can find a way of implementing the KMP protocol while publishing all other source code.
So we recently signed the NDA with Kamstrup - and have now received the KMP protocol documentation. Next step will be writing the necessary code - and testing it.
We do not have access to a Kamstrup 382 meter, so we will rely on helpers in Denmark to whom we will send prototype boards that are modified to be able to communicate with those meters. For the time being we believe we have the candidates we need - but will inform here if we need additional helpers. (We used the same method when we developed Pow-P1 without having laid hand on a single P1 meter yet - and that worked quite well.)
Our current objective is to have solved this sometime in Q2/24. We will then also have next generation boards available for sale, where the necessary modification is done (it's just a question of routing an available microcontroller GPIO to a pin on the connector that connects the board to the meter).
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