I was able to deduce the new host and guide data is now returned. I have created a pull request with the addon so its fixed for other users. I would link it here but it would be a broken URL.

Looks like the API endpoint has changed.

My client attempts to pull the guide from https://my.hdhomerun.com/api/guide.php but that is now returning a HTTP 301 (Permanent redirect) to https://info.hdhomerun.com/info/start that is a web browser HTML page and not guide data.

The info.hdhomerun.com ...

Model: HDHR5-4K
Device ID: 1080291F
Firmware: 20250623
Location: Texas, USA, Dallas / Fort Worth

Client: ****
****'s HDHomeRun client addon: https://github.com/kodi-pvr/pvr.hdhomerun/

Guide data stopped working yesterday afternoon. I've tried restart ****, clearing PVR data, etc. Nothing helped ...

It has been DRM-free for as long as I know. The DRM flag is now on and I cannot stream it.

Time to draft a letter to all of my congressmen. Unfortunately they are all (R) and anti-open Internet, etc.

I was looking on the device web page. I do not use the app.

I do see the signal data in the .json output. Thanks!

On my HDHR5-4K I do not see any signal strength on the channel line-up page. I have rescanned channels a few times. Nothing different. The device still works as expected otherwise. Am I missing something?