Door Lock implemented with a Feedback Servo, an Adafruit nRF52840 Express, an Adafruit Servo Featherwing, and some 3D printed parts..
User-facing software implemented as an iPhone app with SwiftUI, CoreBluetooth and SQLite. With full backgrounding support for the ultimate seamless experience.
The app uses Tuist instead of Xcode project management as an experiment for work, and also because I don't want to commit a bunch of semi-sensitive information from Xcodeproj files.