Closed gonzabrusco closed 1 year ago
Hi Gonzalo,Interesting. I modelled the UDP packet to be identical to what my own emeter sends out. Can you send me a wireshark dump of the 608 byte packet? It would be interesting to see what they have changed.Best regards RalfAm 04.05.2023 um 19:18 schrieb Gonzalo Brusco @.***>: Hi @RalfOGit, I'm just starting to develop a meter that sends out the information using the SMA protocol, so your library comes really useful. Thank you for your work! Anyway, I have a real EMETER at hand and I see that the sent packets are 608 bytes in size. But when looking at your code here, I see you are using a payload size of 600 bytes instead. Is that correct?
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… ok, this explains it. Thanks for the Wireshark dump. There is a new 8-byte field that needs to go behind PowerFactorTotal:
obis = insert(emeter_packet, obis, ObisData::NegativeApparentEnergyTotal, 327.62);
obis = insert(emeter_packet, obis, ObisData::PowerFactorTotal, 0.54);
0e04000000c39300
Looking at the OBIS definitions and at fields displayed, or better not displayed, by the Energy Meter app for iOS, this is likely a value for the grid frequency. I will need to adapt the code to accommodate for this new field. Give me a bit of time for this change.
Have a nice evening
Ralf
Hi Gonzalo,
I just added obis definitions for frequency measurements to libspeedwire and added it to the emeter-simulator as well. Please update both git repositories and check if this works for you.
I deleted your email with the zip attachment for privacy reasons.
Best regards
Ralf
Thanks @RalfOGit !! That was fast!!
I will check it out. Thanks again
Hi @RalfOGit,
I'm just starting to develop a meter that sends out the information using the SMA protocol, so your library comes really useful. Thank you for your work!
Anyway, I have a real EMETER at hand and I see that the sent packets are 608 bytes in size. But when looking at your code here, I see you are using a payload size of 600 bytes instead. Is that correct?
https://github.com/RalfOGit/sma-emeter-simulator/blob/b77a558aed413f6b966cb6d5eae40302e935892f/src/main.cpp#L55