Hi everyone,
I wrote a hacky half-assed custom integration for Home Assistant to login into my Route10 and get connected devices so I can use wifi devices to tell if someone is home.
You can get the integration at GitHub - marcusds/homeassistant-arp_ssh: Gets devices conencted to a router or something using the arp command connecting via SSH
If you need help I will do my best to help, but no promises.
Probably for the best if you are experienced with Home Assistant if you want to try this.
You need to add a public SSH key to your router and then reference the private one in a location available to the integration in Home Assistant.