Presence Detection (no extra hardware)

Hi, I was wondering if it’s somehow possible to detect presence using motion sensors and mobile bluetooth, or without any extra hardware?

I know it won’t be as accurate, but I’d like to experiment a bit, and maybe could use more automations to improve the accuracy (somehow) later on.

Thanks

Do you mean room presence detection or just home/away?

For home/away you can use the GPS sensor from the Home Assistant Mobile app.