Settings for AM550 electricity meter

[crtg]

Hi,

our electricity provider is willing to enable power reading via P1 port on Iskraemeco AM550 electricity meter. However, we have to specify the format of the message and all other parameters.

Is it enough if I specify the DSMR v5, 115200 baud and the following telegram message?

DSMR version 5.0 1-3:0.2.8.255
Instantaneous voltage L1 1-0:32.7.0.255
Instantaneous voltage L2 1-0:52.7.0.255
Instantaneous voltage L3 1-0:72.7.0.255
Instantaneous active power L1 (+P) 1-0:21.7.0.255
Instantaneous active power L2 (+P) 1-0:41.7.0.255
Instantaneous active power L3 (+P) 1-0:61.7.0.255
Instantaneous active power L1 (-P) 1-0:22.7.0.255
Instantaneous active power L2 (-P) 1-0:42.7.0.255
Instantaneous active power L3 (-P) 1-0:62.7.0.255
Actual electricity power delivered (+P) in 1 Watt resolution 1-0:1.7.0.255
Actual electricity power received (-P) in 1 Watt resolution 1-0:2.7.0.255

Is there something else missing (IEC 62056 mode) in the electricity meter they need to set up in order to establish the communication with the Sensorbox-2?

Thanks, Crt

[mstegen]

For the Sensorbox 2, this is enough information.
Although for your own use i would be nice if they could also add the other parameters like total energy delivered, and total energy received.

With a compatible telegram you could also run software like DSMR-reader:
https://dsmr-reader.readthedocs.io/en/v5/explained/about.html#

[crtg]

Thanks for your answer. I can choose also the frequency of the message. Do you have any recommendation? Is 1Hz fast enough?

Thanks, Crt

[mstegen]

Our smart meters send a P1 telegram every second, so yes i would choose 1Hz.

[crtg]

Hi,

are you sure the cable from the meter is compliant also with Iskra AM550? Based on some public info it seems that the signal from EM550 is inverted.

Thanks, Črt

[mstegen]

Yes, our house has a Iskra AM550 smart meter.

The P1 signal will be inverted again by the Sensorbox, you can set the ESP32 to invert the signal. (the previous sensorbox 2 had an extra transistor to invert the serial P1 data, before sending it to the PIC chip)

[crtg]

Hi, do I have to recompile the ESP32 code again or is this inverted RX pin already set? For some unknown reason sensorbox is not receiving data from the AM550 and I don't know the source of the problem. Probably I will have to manually inspect the telegram message. Thanks and best regards, Črt

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On Tue, Apr 11, 2023 at 5:21 PM Michael Stegen ***@***.***> wrote: Yes, our house has a Iskra AM550 smart meter. The P1 signal will be inverted again by the Sensorbox, you can set the ESP32 to invert the signal. (the previous sensorbox 2 had an extra transistor to invert the serial P1 data, before sending it to the PIC chip) — Reply to this email directly, view it on GitHub <#11 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAEKZZK5FK5JIZGHQMS5QQLXAVZFVANCNFSM6AAAAAAV466D4I> . You are receiving this because you authored the thread.Message ID: ***@***.***>