My Covid-project has actually been building exactly this -- except with QR-codes on cards and a dedicated reader. Still in mockup stage, but I really like the p

My Covid-project has actually been building exactly this -- except with QR-codes on cards and a dedicated reader. Still in mockup stage, but I really like the prospect of not having to pop out the phone (and inadvertently get distracted) every time I have to interact with my music-system.