Build Custom Touch-to-Speech Device with Tactile Letter Buttons (Raspberry Pi / Arduino / ESP32)

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I'm looking for a hardware developer or embedded systems engineer to build a simple, standalone communication device for my mother, who has progressive supranuclear palsy (PSP). She is nearly blind and cannot use touchscreens or phones—but she can feel and press tactile physical objects. What I Need: -Build a touch-to-speech communication device that: -Features large tactile letter-shaped buttons -Plays a specific audio file when a button is pressed (e.g., pressing “P” says “Pain”) -Can cycle through multiple messages per letter (e.g., press “T” once = “Thirsty”, twice = “Tired”) -Outputs the audio through a built-in speaker -Requires no screen or visual interface Technical Requirements: -Must use a microcontroller platform (e.g., Raspberry Pi, Arduino, ESP32) -Buttons must map to MP3/WAV audio files stored locally -Speaker must be integrated into the device -All wiring, logic, and audio triggering must work offline I'm open to any platform that meets the needs. If you propose something other than Raspberry Pi, please explain why it’s a better fit (e.g., simpler, cheaper, smaller, better power usage). Deliverables: -A fully working, assembled device shipped to California -All source code and wiring diagrams -A complete parts list with links or sourcing suggestions -Enclosure or mounting instructions (even basic is okay) What I’ll Provide: -MP3 files for each message -A mapping of which letter triggers which word(s) -Timely feedback and quick answers to unblock you Ideal Candidate: -Experience with Raspberry Pi / Arduino / ESP32 -Comfort with GPIO buttons and audio playback -Experience with accessibility projects or prototyping preferred -Ability to deliver and document a complete working unit Timeline: Ideally within 2–3 weeks Budget: $400–$800 (fixed price, negotiable based on scope and deliverables) To Apply, Please Include: -Your proposed platform and why -Relevant project examples (audio, assistive devices, prototyping) -Whether you can ship the completed device to the US -Your estimated timeline and price -Guarantees / Warranties you can provide if any This is a meaningful project and I’ll be responsive throughout. Thanks for considering!

Keyword: Software Development

Price: $600.0

Microcontroller Programming Embedded System ESP32 Raspberry Pi Circuit Design Electronics