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case study: accessibility museum app
project log · recorded may '26
Accessibility Museum App
#flutter#nfc#bluetoothbeacons#text-to-speech
the vision
Accessibility app for visually impaired visitors using NFC and Beacons.
the hurdle
“Cultural institutions often struggle to provide accessible experiences for visually impaired visitors. The museum needed a high-precision, indoor navigation and information system that didn't rely on GPS, which is unreliable indoors.”
01the architecture
Engineered an accessibility-first Flutter application that interfaced directly with native hardware. Implemented a dual-trigger system using Bluetooth Low Energy (BLE) beacons for room-level proximity detection and NFC tags for exhibit-specific interactions. The UI was built specifically to integrate flawlessly with iOS VoiceOver and Android TalkBack.
02battle scars
Bluetooth signal fluctuation caused false-positive triggers for exhibits. I designed a custom signal-smoothing algorithm (using moving averages of RSSI values) to ensure reliable proximity events. Additionally, ensuring 100% screen-reader compatibility required meticulous semantic labeling and custom focus-traversal policies in Flutter.
03the harvest
The application revolutionized the museum experience, directly enabling hundreds of visually impaired visitors to explore independently. It demonstrated my ability to bridge high-level UI frameworks with low-level hardware protocols and established a strong foundation in digital accessibility standards (WCAG).