Wow, your project using the M5Stack Faces as a Bluetooth keyboard is truly innovative! The idea of connecting it to a computer and saving input to an SD card for future use is both practical and creative. I'm especially intrigued by your plan to add a receiver in the future, expanding the project's capabilities even further. Your dedication to documenting the process and inviting feedback shows your commitment to the open-source community. Keep up the great work, and I look forward to seeing your project evolve!