Help - Establish communications with GROWATT SPF

[marbeja]

Describe the bug

I try to connect my Nuc based HA via this Solax modbus but can't get anything out of it.
The serial to Ethernet converter blinks Rx and tx led, IP address correct, tried Port 23 25 26 502 506 but never got anything, tried TCP server modbus also with RTU and without, tried modbus address 1 2 3 4 30001 30.000
always the same, no data. Will try to upload the log files here.
I also tried two USB to Rs485 sticks no data, but the wires are having the typical 0.5V from Rs485 I worked before (orange pair)
Logfile says unable to read serial number %9

Integration Version

2024 02 05

Homeassistant core version

114 c01 05

Inverter brand

GROWATT spf5000es

Plugin used

plugin_growatt.py

Serial prefix

JZM2FAD

Connection Method

Use iot just tcp232-410S

Detailed Error Log

Will add from pc

Additional context

No response

[marbeja]

Core 2024.2.1
Supervisor 2024.01.1
Operating System 11.5
Frontend 20240207.1

[marbeja]

home-assistant_solax_modbus_2024-02-20T09-54-30.592Z.log

[marbeja]

sorry as newbie I cannot edit the issue with adding the error log, it is too big!

[marbeja]

the inverter and is set to 9600bd corretctly, no idea where these 19200 baud come from!
Sorry my logfile is 4,5 MB but there is no possibility to delete it in HA under logs

[marbeja]

what does SPF -WIP mean ? I know that there are several SPF Inverters but never heard of WIP, neither google :(

Growatt:

AC Battery Storage:
    SPA

Hybrid:
    SPF - WIP
    SPH
    TL-XH (MIN & MOD)

PV Only:
    MAC
    MAX
    MID
    TL-X

[wills106]

WIP = Work In Progress You can follow the progress #686

As you are using an RS485-USB Adaptor you need to select Serial on the first window (1st Image) and then it will ask you for the Serial port name on the next page (3rd Image)
https://homeassistant-solax-modbus.readthedocs.io/en/latest/installation/#pair-your-inverter

[marbeja]

thanks for the speedy reply, I tried both, the USB and the RS485 to Ethernet but both don't work!
I used lsusb -v in console to verify my 2 USB / 485 converters and it seems the are not recognized, so I will concentrate on the additional ethernet connection:

[marbeja]

is that correct to put port 502 everywhere?

[marbeja]

I tried modbus adress 1 to 3 and without parallel even I have 2 inverters

do I have to mark `Modbus RTU over TOP here for the rather old SPF ??

[wills106]

EPS, Dry Contact and Parallel Mode wont do anything on your Inverter.

Can't you see the modbus address on the Inverter LCD?

I would put Misc Config back to default. Or factory reset the URS.

Also it looks like you are pointing the Integration at 192.168.1.7 but you are configuring the URS on 192.168.1.10 though.

Also are you connecting A to A and B to B between the URS and Inverter? They don't go A-B and B-A like on a RS232 setup.

[wills106]

I have moved this to a discussion as it isn't an Integration issue.

[abspoel99]

Here is my setup, hope it helps.

Inverter: Growatt 10KTL3-XH
Modbus: waveshare eth to modbus
Intergration: solax inverter modbus