Fail to connect

[AlbertvanEngen]

Describe the bug I'm using a Hoymiles DTU-Pro-S that is connected via a network cable to my router.

As soon as I try to setup the Hoymiles DTU connection, I enter the IP address (found on the router and able to ping) as Host and leave the default 35 as update interval. Then press the send button. Then I do get a message "Failed to connect" and the host field is cleared.

Please advise how to solve this issue

To Reproduce Steps to reproduce the behavior: see above

Expected behavior The Hoymiles installation will be connected to my Home Assistant server

Desktop (please complete the following information):

• OS: MacOS
• Browser safari
• Version 15

Smartphone (please complete the following information):

• Device: iPhone 15
• OS: IOS 18.0.1
• Browser safari

Additional context Home Assistant 2024.10.3 on Raspberry PI 3

[iroc-fabi]

Bei mir gleicher Fehler. DTU PRO S wird nicht gefunden. DTU Version V00.02.23

[suaveolent]

Is there anything in the logs?

Can you ping your DTU from your home assistant instance?

[iroc-fabi]

Verbunden.

[iroc-fabi]

[suaveolent]

Can you look into the log if there is anything explaining the issue?

[AlbertvanEngen]

Is there anything in the logs?

Can you ping your DTU from your home assistant instance?

Yes I can ping the DTU pro

[iroc-fabi]

No entry in the log.

[iroc-fabi]

I have now switched off DHCP on the DTU and reset the firmware to V00.02.19. Doesn't help either.

[suaveolent]

Can you check if the get-real-data-new command from the hoymiles-wifi (https://github.com/suaveolent/hoymiles-wifi) lib works?

Please only keep the first four digits of the serial numbers and post the ouput if successfull.

[AlbertvanEngen]

When I execute hoymiles-WiFi --host 192.168.2.2 get-real-data-new I do get a message: no response or unable to retrieve response for get-real-data-new

Ping however is sending a reply

[suaveolent]

Well that explains why the Home Assistant integration cannot connect.

Are you sure 192.168.2.2 is the correct IP-address? Can you access the web interface of the DTU via this ip-address?

[AlbertvanEngen]

This is the ip address the dtu is having on my router, connected via Itp cable. I'm not able to connect via a web browser

[suaveolent]

I See. When you directly connect to the DTU do you get a response for the command ?

[AlbertvanEngen]

When I connect my phone to the dtu WiFi I can connect via the app, it is not working via a browser

[suaveolent]

Can you connect your pc to the DTU wifi and issue the get-real-data-new command ? (Note that the DTU will have a different ip address)

[AlbertvanEngen]

When I connect my pc directly to the WiFi router of the dtu, I do get a response from the dtu with block sgs_data and pv_data

[AlbertvanEngen]

I've made a WiFi connection from the HA instance directly to the dtu, now I'm able to get data from the dtu in HA. It seems that the wired Ethernet connection is not able to read data via the local wired network

[suaveolent]

That is interesting. Maybe there is something else going wrong in your setup? I have heard from multiple sides that the connection should work via a router too.