Chint DDSU66 Single Phase with Waveshare RS485 to Eth

Configuration
1

Hi First Post so please bare with me.

I am attempting my first integration.
I wish to Chint DDSU66 > Waveshare RS485 to Eth (B) > HA Green.

I am confortable with Modbus and worked on and off with it for years.

I have Modbus Poll tool and i cac poll the DDSU66 using USB tool. I can poll registers and see data so that is all good.

I can log into my WS RS485 2 Eth via on board web sever and i can configure the it via the wave share tool VirCom. So that appears all good. I can follow most of the waveshare online help content but it is very confusing.

Waveshare RS485 TO ETH Configuration
Serial Port configuration
Baud Rate: 9600 bps
Data Size: 8bit
Parity: Even
Stop Bits: 1
Local Port Number: 8888
Work Mode: TCP Server
other options unchecked
rest parameters - default

For life i cannot read the DDSU66 end to end via TCP/IP RTU polling on the ModbusPoll tool nor see it in HA, i cannot see the ACT light on. Im pretty sure my yaml is correct but as i can Poll it end to end.

What am i missing here? Many hours pulling out my hair and looking at everything online.

can someone please point me in the right direction.

Here is my VirCom connection if it helps.

image
image856×557 32.4 KB

2

I understand the Waveshare → DDSU66 part work, but not the Waveshare → HA one, is that correct?

Did you search the forum?
I see threads that can be relevant to you, e.g

and

3

Update - i managed to find the problem. I was double dipping on the “Modbus RTU” setting. I was setting it on the Waveshare end and in my yaml / ModbusPoll end.

You only set at one end.
What i have now and it works:
Modbus TCP setting at Waveshare:

Waveshare
Waveshare427×108 2.6 KB

My modbus.yaml now

  • name: waveshare1
    type: tcp
    host: xxx.xxx.xxx.xxx
    port: 502
    delay: 2
    timeout: 10

What i had that was wrong was;
yaml

  • name: waveshare1
    type: rtuovertcp
    host: xxx.xxx.xxx.xxx
    port: 502
    delay: 2
    timeout: 10

and when i was intially testing with Modbus poll
i was connecting with “Modbus RTU/ASCII over TCP/IP”. now i just connect with “Modbus TCP/IP”.

So all working, now to teach my self dashboards.