TCP Client for Sungrow Devices with encryption

Third party integrations
1

Hi There,

I am running Homeassistant on a Raspberry Pi3, using hassio. I am using Home Assistant OS core-2022.5.3 and Home Assistant OS 7.6.

I want to retrieve data from my SunGrow Inverters (SH5K-30).

I have installed ModbusTCP2MQTT from here GitHub - TenySmart/HassioAddon: Home Assistant Addons Repository. The installation went fine, and the client is sending requests, however I am receiving an error that connection is refused.

ERROR:pymodbus.client.sync:Connection to (192.168.1.53, 501) failed: [Errno 111] Connection refused
ERROR:pymodbus.client.sync:Connection to (192.168.1.53, 501) failed: [Errno 111] Connection refused
WARNING:root:No data. Try increasing the timeout or scan interval.
WARNING:root:Failed to scrape inverter, sleeping until next scan

I believe that Sungrow have adopted encryption to their modbus connection and I suspect that may be the issue.

To address that I found the project TCP Client for Sungrow Devices with AES128 ECB encryption by rpvelloso, which adds encryption to the modbus client

The instruction says to " just replace ModbusTcpClient() with SungrowModbusTcpClient()".

Can someone please advise how I go about that. I can connect to the system console using ssh, but I don’t know where to go after that.

Thanks

Anthony

2

hi,
were you able to get some additional info on this, how to make that change? trying to figure it out myself and getting stuck where/ what to do

3

Heigo2,

no I have not yet been successful. I have parked it for the moment.

Anthony