So to be on the same page, if you give read/write permissions to all users HomeAssistant can use the device fine, but not if only root and dialout group have it? Reason I ask is, since HomeAssistant as such runs with the dialout group. Which kind of integration is this? Maybe it spawns other processes which run as different user? Since I can't reproduce this locally, maybe you can send a mail to support@cloudron.io if you want us to take a direct look at your case to get this fixed.

@rjousse18 whoops, we had a bug in our renovate configuration. However, the tests fail - https://git.cloudron.io/packages/homeassistant-app/-/merge_requests/7 . We are looking into this.

Yes my.subdomain.com works perfectly. and yes i changed the cloudflare dns to the same local ip as the my,subdomain and it is now working. i thought guac would be running on a different ip address to the cloudron machine

Indeed on Cloudron the app needs to specify which ports are forwarded from outside to the app container. Currently HA has no ports setup there. We can easily add port 1400 for this, but it is not clear how this is protected by HA. Is this designed to be used in a trusted home network or fine to be exposed on the public?