There are already production systems like the WiZ lights which use wifi for person detection (https://www.signify.com/global/our-company/news/press-releases/202

There are already production systems like the WiZ lights which use wifi for person detection (https://www.signify.com/global/our-company/news/press-releases/2022/20220916-signify-delivers-new-way-to-automate-your-lights-using-wi-fi-sensing-technology https://www.signify.com/global/our-company/news/press-releas...).