After getting feedback that our design needed more implementation details and stronger technical support, I spent some time researching Wi-Fi communication protocols for the ESP32 and ended up choosing ESP-NOW for our communication layer.
I also built an early version of our left-hand detection system using MediaPipe, turning it into a small Python app that could detect which finger is bent on one hand. While testing it, we realized that the one-finger chord-playing idea was a bit too tricky in practice, so we decided to pivot to a simpler approach, and maybe more intuitive for musicians, using hand gesture numbers to match chord numbers within a key.