index out of range #40

yoursnack · 2022-03-30T15:24:27Z

Hi I'm having an issue to read values from an SG40CX. I don't know if I should paste here but just be sure, this is my output on pastebin : https://pastebin.com/SqD1Ep3p

It seems to be reading some values but the output is always 0 or nothing at all. Included here the output of the webserver: https://pastebin.com/n8LkGWP2

Greetings and I hope we can work this out together!

bohdan-s · 2022-03-30T21:28:24Z

Looks like you have the “encrypted” modbus. Change the setting:
connection: sungrow

yoursnack · 2022-03-31T11:04:11Z

Hi, thanks for your quick reply. However it gives me practically the same output.

https://pastebin.com/mKh04WpM

Even if I try port 8082, it can connect, send but gets no reply

bohdan-s · 2022-03-31T11:13:51Z

Remove the port option.
connection: http
;) third time is a charm right?

yoursnack · 2022-03-31T11:27:02Z

Nope, that also did not work.
https://pastebin.com/Cc8U90yJ
I did a port scan on it and I guess port 80 is not open at all. Is there anything I can do to help find out what it is so others will not be stuck in the future?

Port Scan TCP:
Starting Nmap 7.80 ( https://nmap.org ) at 2022-03-31 12:24 WEST
Nmap scan report for 172.16.2.198
Host is up (0.14s latency).
Not shown: 998 closed ports
PORT STATE SERVICE
443/tcp open https
8082/tcp open blackice-alerts

Port scan UDP:
Starting Nmap 7.80 ( https://nmap.org ) at 2022-03-31 12:25 WEST
Nmap scan report for 172.16.2.198
Host is up (0.16s latency).
Not shown: 999 closed ports
PORT STATE SERVICE
5353/udp open zeroconf
MAC Address: AC:0B:FB:0A:59:88 (Unknown)

EDIT: What about that https thing?

bohdan-s · 2022-03-31T11:37:17Z

What dongle/Ethernet adapter are you using? Does the data publish to iSolarCloud at the moment?

yoursnack · 2022-03-31T13:05:25Z

WiNet-S from Sungrow, it is publishing data to iSolarCloud. Using it over Wifi by the way

bjeanes · 2022-07-07T03:47:26Z

I am in a similar position. SH5.0RS using a WiNet-S (version M_WiNet-S_V01_V01_A) connected both on WLAN and LAN, trying to connect over LAN connection. connection: http works, but neither sungrow nor modbus work.

It eventually prints out 13 registers, but with predominantly zeroed values:

2022-07-07 13:44:24 WARNING  Modbus connection failed
Modbus connection failed
2022-07-07 13:44:24 ERROR    index out of range
index out of range
2022-07-07 13:44:24 ERROR    Modbus Error: [Input/Output] Unable to decode request
Traceback (most recent call last):
  File "/opt/homebrew/lib/python3.9/site-packages/pymodbus/transaction.py", line 208, in execute
    self.client.framer.processIncomingPacket(response,
  File "/opt/homebrew/lib/python3.9/site-packages/pymodbus/framer/socket_framer.py", line 153, in processIncomingPacket
    self._process(callback)
  File "/opt/homebrew/lib/python3.9/site-packages/pymodbus/framer/socket_framer.py", line 175, in _process
    raise ModbusIOException("Unable to decode request")
pymodbus.exceptions.ModbusIOException: Modbus Error: [Input/Output] Unable to decode request
Modbus Error: [Input/Output] Unable to decode request
Traceback (most recent call last):
  File "/opt/homebrew/lib/python3.9/site-packages/pymodbus/transaction.py", line 208, in execute
    self.client.framer.processIncomingPacket(response,
  File "/opt/homebrew/lib/python3.9/site-packages/pymodbus/framer/socket_framer.py", line 153, in processIncomingPacket
    self._process(callback)
  File "/opt/homebrew/lib/python3.9/site-packages/pymodbus/framer/socket_framer.py", line 175, in _process
    raise ModbusIOException("Unable to decode request")
pymodbus.exceptions.ModbusIOException: Modbus Error: [Input/Output] Unable to decode request
2022-07-07 13:44:24 WARNING  Modbus connection failed
Modbus connection failed
2022-07-07 13:44:24 ERROR    index out of range
index out of range
2022-07-07 13:44:24 ERROR    Modbus Error: [Input/Output] Unable to decode request
Traceback (most recent call last):
  File "/opt/homebrew/lib/python3.9/site-packages/pymodbus/transaction.py", line 208, in execute
    self.client.framer.processIncomingPacket(response,
  File "/opt/homebrew/lib/python3.9/site-packages/pymodbus/framer/socket_framer.py", line 153, in processIncomingPacket
    self._process(callback)
  File "/opt/homebrew/lib/python3.9/site-packages/pymodbus/framer/socket_framer.py", line 175, in _process
    raise ModbusIOException("Unable to decode request")
pymodbus.exceptions.ModbusIOException: Modbus Error: [Input/Output] Unable to decode request
Modbus Error: [Input/Output] Unable to decode request
Traceback (most recent call last):
  File "/opt/homebrew/lib/python3.9/site-packages/pymodbus/transaction.py", line 208, in execute
    self.client.framer.processIncomingPacket(response,
  File "/opt/homebrew/lib/python3.9/site-packages/pymodbus/framer/socket_framer.py", line 153, in processIncomingPacket
    self._process(callback)
  File "/opt/homebrew/lib/python3.9/site-packages/pymodbus/framer/socket_framer.py", line 175, in _process
    raise ModbusIOException("Unable to decode request")
pymodbus.exceptions.ModbusIOException: Modbus Error: [Input/Output] Unable to decode request
2022-07-07 13:44:24 WARNING  Modbus connection failed
Modbus connection failed
2022-07-07 13:44:24 ERROR    index out of range
index out of range
2022-07-07 13:44:24 ERROR    Modbus Error: [Input/Output] Unable to decode request
Traceback (most recent call last):
  File "/opt/homebrew/lib/python3.9/site-packages/pymodbus/transaction.py", line 208, in execute
    self.client.framer.processIncomingPacket(response,
  File "/opt/homebrew/lib/python3.9/site-packages/pymodbus/framer/socket_framer.py", line 153, in processIncomingPacket
    self._process(callback)
  File "/opt/homebrew/lib/python3.9/site-packages/pymodbus/framer/socket_framer.py", line 175, in _process
    raise ModbusIOException("Unable to decode request")
pymodbus.exceptions.ModbusIOException: Modbus Error: [Input/Output] Unable to decode request
Modbus Error: [Input/Output] Unable to decode request
Traceback (most recent call last):
  File "/opt/homebrew/lib/python3.9/site-packages/pymodbus/transaction.py", line 208, in execute
    self.client.framer.processIncomingPacket(response,
  File "/opt/homebrew/lib/python3.9/site-packages/pymodbus/framer/socket_framer.py", line 153, in processIncomingPacket
    self._process(callback)
  File "/opt/homebrew/lib/python3.9/site-packages/pymodbus/framer/socket_framer.py", line 175, in _process
    raise ModbusIOException("Unable to decode request")
pymodbus.exceptions.ModbusIOException: Modbus Error: [Input/Output] Unable to decode request
2022-07-07 13:44:24 WARNING  Modbus connection failed
Modbus connection failed
2022-07-07 13:44:24 ERROR    index out of range
index out of range
2022-07-07 13:44:24 ERROR    Modbus Error: [Input/Output] Unable to decode request
Traceback (most recent call last):
  File "/opt/homebrew/lib/python3.9/site-packages/pymodbus/transaction.py", line 208, in execute
    self.client.framer.processIncomingPacket(response,
  File "/opt/homebrew/lib/python3.9/site-packages/pymodbus/framer/socket_framer.py", line 153, in processIncomingPacket
    self._process(callback)
  File "/opt/homebrew/lib/python3.9/site-packages/pymodbus/framer/socket_framer.py", line 175, in _process
    raise ModbusIOException("Unable to decode request")
pymodbus.exceptions.ModbusIOException: Modbus Error: [Input/Output] Unable to decode request
Modbus Error: [Input/Output] Unable to decode request
Traceback (most recent call last):
  File "/opt/homebrew/lib/python3.9/site-packages/pymodbus/transaction.py", line 208, in execute
    self.client.framer.processIncomingPacket(response,
  File "/opt/homebrew/lib/python3.9/site-packages/pymodbus/framer/socket_framer.py", line 153, in processIncomingPacket
    self._process(callback)
  File "/opt/homebrew/lib/python3.9/site-packages/pymodbus/framer/socket_framer.py", line 175, in _process
    raise ModbusIOException("Unable to decode request")
pymodbus.exceptions.ModbusIOException: Modbus Error: [Input/Output] Unable to decode request
2022-07-07 13:44:24 WARNING  Modbus connection failed
Modbus connection failed
+----------------------------------------------------------------------+
| Address | Register                            | Value                |
+---------+-------------------------------------+----------------------+
| ----    | device_type_code                    | SH5.0RS              |
| ----    | run_state                           | ON                   |
| 5006    | start_stop                          | Start                |
| 5007    | power_limitation_switch             | Enable               |
| 5008    | power_limitation_setting            | 100.0 %              |
| 5019    | power_factor_setting                | 0.0                  |
| 5036    | reactive_power_adjustment_mode      | Enable Q(U)          |
| 5037    | reactive_power_percentage_setting   | 0.0 %                |
| 5039    | power_limitation_adjustment         | 0.0 kW               |
| 5040    | reactive_power_adjustment           | 0.0 kVar             |
| ----    | export_to_grid                      | 0 W                  |
| ----    | import_from_grid                    | 0 W                  |
| ----    | timestamp                           | 2022-7-7 13:44:24    |
+----------------------------------------------------------------------+
Logged 13 registers to Console

bohdan-s · 2022-07-07T03:53:05Z

@bjeanes the WiNet-S only supports HTTP method. Modbus gives errors or bad data.

bohdan-s · 2022-07-07T03:54:45Z

@yoursnack sorry for the delay, you can only have 1 session open via HTTP do the dongle (well you can have more but its unstable).
Try restarting the dongle and connecting via HTTP port 80 and it should work.

bjeanes · 2022-07-07T04:12:12Z

@bjeanes the WiNet-S only supports HTTP method. Modbus gives errors or bad data.

I'm gathering this. Is this likely to be permanent? If so, are you aware of an alternate dongle I can replace to use Modbus directly? I bought this inverter with the intent to send Modbus commands, not just reading registers 😬

bohdan-s · 2022-07-07T04:16:58Z

Thats up to Sungrow to fix :( Some German users are saying their firmware (v10) is working on the discord.

We "can" write registers via the HTTP method, I just haven't implemented it.

What registers are you interesting in writing to?

bjeanes · 2022-07-07T04:23:04Z

Thats up to Sungrow to fix :(

I'll email them to add another voice to hassle them about this.

Some German users are saying their firmware (v10) is working on the discord.

Interesting... When I visit the IP in browser I am asked for an installer login. Perhaps with those credentials Modbus access can be enabled and their installers did so? (wishful thinking on my part, probably).

We "can" write registers via the HTTP method, I just haven't implemented it.

Oh! Interesting. That might work then.

What registers are you interesting in writing to?

I'll have to review my notes from a few months ago when researching this. It's been evicted from my brain while waiting for the install to take place. But the use-case is describable: I want to be able to force charge and discharge programmatically. I'm on a wholesale energy retailer and have a pretty sizeable PV array and battery. While arbitrage is not really long-term profitable, during wholesale price spikes as have been happening a lot in my region (and probably everywhere), selling a % of my stored energy is something I had hoped to make work.

Edit: So, IIRC my theory of how to accomplish this based on my notes was to use hold registers 13050 (EMS mode), 13051 (charge/discharge/stop command), 13052 (charge/discharge power) and/or 13058 (max state of charge) and 13059 (min state of charge). These are the registers applicable to hybrid inverter as per
1608064349708-communication-protocol-of-residential-hybrid-inverterv1.0.20-1-1.pdf but may obviously differ across some products.

alangibson-philips · 2022-08-14T20:22:48Z

Just adding a datapoint. I have a Sungrow SH8.0RT with WiNet-S dongle (firmware version M_WiNet-S_V01_V01_A). Neither modbus nor sungrow connection settings work. However http works perfectly. It even worked when I was logged in to the web app. I was just summarily logged out when connecting with SunGather.

Errors are just a whole lot of

2022-08-14 22:13:43 DEBUG    SEND: 0x0 0x1 0x0 0x0 0x0 0x6 0x1 0x4 0x13 0x88 0x0 0x64
2022-08-14 22:13:43 DEBUG    New Transaction state 'SENDING'
2022-08-14 22:13:43 DEBUG    Changing transaction state from 'SENDING' to 'WAITING FOR REPLY'
2022-08-14 22:13:43 DEBUG    Changing transaction state from 'WAITING FOR REPLY' to 'PROCESSING REPLY'
2022-08-14 22:13:43 DEBUG    RECV: 0x0 0x1 0x0 0x0 0x0 0x2 0x1 0x84 0x2
2022-08-14 22:13:43 DEBUG    Processing: 0x0 0x1 0x0 0x0 0x0 0x2 0x1 0x84 0x2
2022-08-14 22:13:43 DEBUG    Factory Response[132]
2022-08-14 22:13:43 ERROR    index out of range
2022-08-14 22:13:43 ERROR    Modbus Error: [Input/Output] Unable to decode request
Traceback (most recent call last):
  File "/home/alangibson/.local/lib/python3.8/site-packages/pymodbus/transaction.py", line 208, in execute
    self.client.framer.processIncomingPacket(response,
  File "/home/alangibson/.local/lib/python3.8/site-packages/pymodbus/framer/socket_framer.py", line 153, in processIncomingPacket
    self._process(callback)
  File "/home/alangibson/.local/lib/python3.8/site-packages/pymodbus/framer/socket_framer.py", line 175, in _process
    raise ModbusIOException("Unable to decode request")
pymodbus.exceptions.ModbusIOException: Modbus Error: [Input/Output] Unable to decode request

bjeanes · 2022-08-14T22:57:40Z

@alangibson-philips update the firmware on the WiNet-S and you will get (admittedly somewhat buggy) Modbus connection working.

The sungrow type is misleading (perhaps could be renamed) and is for the encrypted modbus which older SG inverters (or dongles?) used. The new SH##.0RS/T don't use it.

dmindfuse mentioned this issue Apr 6, 2023

Index Out of Range & Modbus Error: [Input/Output] Unable to decode request michbeck100/pv-monitoring#3

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index out of range #40

index out of range #40

yoursnack commented Mar 30, 2022

bohdan-s commented Mar 30, 2022

yoursnack commented Mar 31, 2022

bohdan-s commented Mar 31, 2022

yoursnack commented Mar 31, 2022 •

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bohdan-s commented Mar 31, 2022

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bjeanes commented Jul 7, 2022

bohdan-s commented Jul 7, 2022

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alangibson-philips commented Aug 14, 2022

bjeanes commented Aug 14, 2022

index out of range #40

index out of range #40

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yoursnack commented Mar 30, 2022

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