DLMS - Reading data from an utility meter
Thursday, July 11. 2024
DLMS/COSEM or Device Language Message Specification / Companion Specification for Energy Metering is something IEC 62056 set of standards define. The use case is to enable a consumer to access readings of a smart meter. Technology is robust, it was introduced in Netherlands nearly 30 years ago. Accessing data is also very straightforward, DLMS.dev has instructions for this.
Port and magnet-attaching reader look like these:
Simple & robust. Then there is the but -part. (there always is one)
My electricity meter (let's state the obvious: provided by my utility company) looks like this:
Unit is a Landis+Gyr E450 and it has the port ... aaand the port doesn't work. In my books "work" would indicate some sort of data flow. To sort this out, I contacted tech support with questions. The reply I got was astonishing! DLMS is disabled for all units because of expensive license fee. The greedy bastards at Landis+Gyr want more money for (EU) 2019/944 given consumer rights. As the price is steep, my provider chose not to comply, which translates into no data for me.
Given EU laws and regulations, the story does not end there. In their infinite wisdom, L+G license fee for HAN P1 interface makes commercial sense, so:
Now I'm running a Landis+Gyr E360.
Obviously, the HAN P1 doesn't work yet. It needs to be enabled from network control. For the mentioned license fee. I'll get back to this when I have any data.
