MODBUS: Unable to decode request on WiFi

[vsimonaitis]

Hi,
I have Sungrow SH10RT inverter with latest firmware. I connected it to Home Assistant, but most of the sensors are not returning any data.
In logs see some request errors, but no details.
2023-02-20 11:41:27.142 ERROR (SyncWorker_2) [pymodbus.factory] index out of range 2023-02-20 11:41:27.143 ERROR (SyncWorker_2) [pymodbus.transaction] Modbus Error: [Input/Output] Unable to decode request Traceback (most recent call last): File "/usr/local/lib/python3.10/site-packages/pymodbus/transaction.py", line 217, in execute self.client.framer.processIncomingPacket( File "/usr/local/lib/python3.10/site-packages/pymodbus/framer/socket_framer.py", line 178, in processIncomingPacket self._process(callback) File "/usr/local/lib/python3.10/site-packages/pymodbus/framer/socket_framer.py", line 198, in _process raise ModbusIOException("Unable to decode request") pymodbus.exceptions.ModbusIOException: Modbus Error: [Input/Output] Unable to decode request
Do you know what could be wrong?

[lassej01]

• Do you have ethernet cable inserted into the RJ45 connection in the VR (not the Winet-Dongle)?
• Have you set every parameter needed in Secrets.yaml?
• Have you got the right IP-adress for your modbus traffic?

[vsimonaitis]

No, I have my inverter on Wifi configured and this looks to be a problem. Many thanks for the hint!
Will try wired connection now.

[s79junk]

I have an installation from last week with current firmware and and do not try wireless, but meanwhile you can use the ethernet cable in the winet-dongle for modbus as well. I tried both variants with this implementation and in both cases i only miss the battery (i have BYD HVS) specific parameters sensor.sg_battery_charge_nom and sensor.sg_battery_level_nom

[dylan09]

i only miss the battery (i have BYD HVS) specific parameters sensor.sg_battery_charge_nom and sensor.sg_battery_level_nom

That are template sensors. Not read from Modbus.

[paulius2k]

@vsimonaitis - did you get it to work correctly?

[vsimonaitis]

Yes, but not over WiFi. I connected it via internal LAN port (not the WiFi module)

…

On Fri, Apr 28, 2023, 22:35 paulius2k ***@***.***> wrote: @vsimonaitis <https://github.com/vsimonaitis> - did you get it to work correctly? — Reply to this email directly, view it on GitHub <#70 (reply in thread)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABKRQ4OASLZ37VZT4U4W7BDXDQLWJANCNFSM6AAAAAAVBV5BOA> . You are receiving this because you were mentioned.Message ID: <mkaiser/Sungrow-SHx-Inverter-Modbus-Home-Assistant/repo-discussions/70/comments/5757921 @github.com>

[mheloy]

Just for clarification... if I have this error is it because of the Winet WIFI connection? I've got the SH5.0RS

[mkaiser]

Just for clarification... if I have this error is it because of the Winet WIFI connection? I've got the SH5.0RS

yes, that is most likely. If you have any spare time... Could you comment sensors after sensors and try to spot the sensor that is not working?

[mheloy]

It seems like after removing this... I have no more errors

EDIT
After 7 mins... I got error

came back again after 10 mins

EDIT : I have removed the Monthly Yearly pv_generation, export no more errors since then