Easun - ISolar SMW 11Kw

[robertio]

Hi,

I would like to use my Easun - ISolar SMW 11Kw with Home Assistant, and tried to use easunpy.
but it seems does not work.

Is this easun device supported?

This is the command line output:

#python3 -m easunpy
Discovering inverter IP...

Trying discovery message: set>server=
Broadcasting to 255.255.255.255:58899
✓ Found device at 192.168.188.127
Response: rsp>server=2;
Found inverter at: 192.168.188.127
WARNING:easunpy.async_isolar:AsyncISolar initialized with model: ISOLAR_SMG_II_11K
WARNING:easunpy.async_isolar:Getting all data for model: ISOLAR_SMG_II_11K
INFO:easunpy.async_modbusclient:Bulk send attempt 1/5
INFO:easunpy.async_modbusclient:Received response from ('192.168.188.127', 58899)
UDP discovery result: True
INFO:easunpy.async_modbusclient:Server started on 192.168.188.41:8899
INFO:easunpy.async_modbusclient:Client connected from ('192.168.188.127', 58536)
WARNING:easunpy.async_modbusclient:Sending command: 07720001000aff04000300c9000155e5
ERROR:easunpy.async_modbusclient:Timeout reading response for command: 07720001000aff04000300c9000155e5
INFO:easunpy.async_modbusclient:Bulk send attempt 2/5
INFO:easunpy.async_modbusclient:Received response from ('192.168.188.127', 58899)
UDP discovery result: True
INFO:easunpy.async_modbusclient:Server started on 192.168.188.41:8899
INFO:easunpy.async_modbusclient:Client connected from ('192.168.188.127', 62075)
WARNING:easunpy.async_modbusclient:Sending command: 07720001000aff04000300c9000155e5
WARNING:easunpy.async_modbusclient:Response: 077200010002ff04
WARNING:easunpy.async_modbusclient:Sending command: 07730001000aff040003011500059420
ERROR:easunpy.async_modbusclient:Timeout reading response for command: 07730001000aff040003011500059420
WARNING:easunpy.async_isolar:Failed to decode register group (201, 1): invalid literal for int() with base 16: ''
No data received from inverter

Best Regards,
Robert

[vgsolar2]

Hi Robert

Thank you for reaching out. At the moment, only SMG versions are supported. I do plan to add support for other variants once I have a complete register map and someone available to help test them. As soon as I have the necessary information, I'll be sure to update you.

Best

[robertio]

Hi.
Thanks for the response. Sorry to hear not having support yet.
Maybe I can provide logs, outputs if you guide me how to debug properly.
I tried yesterday wireshark to see UDP packages, but either I was on different segment (pc was on wired but inverter was on WiFi) or I didn't filter properly, so didn't see any response.

Anyway thanks again.
Robert

[vgsolar2]

Hi,

Based on the logs, the response you're receiving ('077200010002ff04') appears to be in an incorrect format, which suggests that there may be a variation in the protocol. Unfortunately, this means you won't see any communication from the inverter to your Home Assistant (HA).

One workaround is to set up your computer as a router for the WiFi dongle. You could connect via Ethernet or use a mobile network to provide internet access, then use your WiFi as a hotspot. With this configuration, you can run Wireshark to capture and analyze the communication with dessmonitor/SmartESS. This is the approach I took, and it allowed me to observe the request/response payloads to better understand how it works for SMG.

I hope this helps.

Best regards

[robertio]

Many thanks!
That makes sense!
Now I try serial connection and then I try turn back easunpy.
Dessmonitor reliability is one of the worst software ever met .:)

[robertio]

OK. Fritzbox routers have a inbuilt packet capture features. http://fritz.box/html/capture.html

So packages easily captured. :)

Wireshark filtered only for Easun ip address.
A few hundred TCP packages are captured.

Q1: Only TCP packed expected? (No UDP?)
How to decode this packages?

[vgsolar2]

That's great. Can you send the data export? what I see in the screenshot looks like a response from the wifi dongle to smartESS.

To your question, the UDP is used to satbliss the communication with the dongle and then the dongle connects with the server and communciates over TCP.

If you can send the data exported so I can see the payload, I might give it a try to see if I understand the difference. :)

Best

[robertio]

Thank you very much for your efforts. :)
Thanks for investigate the files, now i attach two files. one is longer, and one shorter.

p1.pcap.gz

p2.pcap.gz

[vgsolar2]

Hi,

Thanks for the files robert, unfortunately seems this model utilizes a different protocol. I will try to give it a shot when I have some more time but it will be difficutl without a device to test on my side.

Will let you know if there is any progress.

Best

[robertio]

Thanks for all your efforts. I'm waiting.
I hope solving this protocol will worth and help many other inverters handling.

Let me know if I can do any new log or anything.

Many thanks again.
:)

[Kiritsugu35]

Hello,
Any help you required and testing I can help.

[ArianHiwa]

exactly can be integrated but as SMG so no device detected, any update?

https://photos.app.goo.gl/q7GvDLGew5zdu7Nt9