Wearable Dementia Guardian Device Prototype

ESP32-Based Wearable Dementia Safety & Voice-Reminder Prototype

Project Overview

I am looking for an embedded systems / IoT developer to build a single functional prototype of a wearable device called Mitra – Wearable Guardian for Dementia Care.

This is a student innovation/competition prototype, not a commercial medical device. The priority is to create a reliable, compact and presentable working prototype at a reasonable cost.

I am specifically looking for someone experienced with ESP32, GSM/SMS, sensors, audio playback, PCB design and small wearable electronics.

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Required Features

1. Emergency SOS

- Physical, easily accessible SOS button.
- When pressed, Mitra should send an actual SMS to a pre-configured caregiver phone number.
- SMS should contain:
- Emergency alert
- Brief message
- Pre-configured demonstration location
- Google Maps link
- Live GPS is NOT required for this prototype.
- The location can be hardcoded in the firmware.

2. Fall Detection

- Use an accelerometer/gyroscope such as MPU6050.
- Detect a possible fall based on acceleration/orientation changes.
- Trigger an appropriate caregiver alert.

3. Voice Reminders

- Mitra should have a small speaker.
- Voice reminders should be stored locally and played at scheduled times.
- Example:
«“Dadi, it’s time to take your medicine.”»
- Ideally, the caregiver should be able to record their own voice through a simple phone interface and transfer the recording to Mitra.
- Preference is real human voice recordings, not robotic TTS.

4. Connectivity

- ESP32 as the main controller.
- Wi-Fi/Bluetooth for caregiver communication.
- GSM/cellular module for independent emergency SMS.

5. Battery

- Rechargeable battery.
- Charging and battery-protection circuitry.
- Suitable for portable wearable use.

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Proposed Hardware

The exact components can be recommended by the developer, but the expected architecture is approximately:

- ESP32 / compact ESP32 variant
- GSM/cellular module
- MPU6050 or equivalent IMU
- Physical SOS button
- Speaker + amplifier/audio module
- microSD/local audio storage
- Rechargeable Li-ion/Li-Po battery
- Charging/power-management circuit
- Status LED
- Custom PCB
- 3D-printed/custom enclosure

GPS should NOT be included in V1.

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Physical Requirements

The final device should be a genuine wearable prototype, preferably a compact pendant/neck-worn device.

Requirements:

- No exposed breadboard in the final version
- No loose jumper wires
- Electronics enclosed securely
- Large/easy-to-find SOS button
- Speaker opening
- Charging port
- Lanyard/neck-strap attachment
- Compact and neat appearance

A custom PCB is preferred after the electronics have been tested.

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Development Approach

I would prefer the following staged approach:

Phase 1 — Functional electronics prototype
ESP32 + GSM + SOS + fall detection + audio + battery

Phase 2 — Firmware integration and testing

Phase 3 — Custom PCB

Phase 4 — 3D-printed enclosure

Phase 5 — Final assembly and demonstration testing

This is a one-unit prototype, not mass production.

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Deliverables

Please include:

1. Fully working assembled prototype
2. Firmware/source code
3. Custom PCB design
4. PCB Gerber/design files
5. Bill of Materials
6. 3D enclosure
7. Basic caregiver interface/prototype interface
8. Wiring/block diagram
9. Basic operating instructions
10. Final testing and demonstration

I would like ownership/access to the project source files so that the prototype can be demonstrated and further developed later.

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Important Prototype Simplifications

To keep the project affordable and suitable for a student competition:

- No live GPS required
- Location can be hardcoded
- No AI required
- No cloud infrastructure required unless genuinely necessary
- No medical certification required
- No mass-production optimization required
- No unnecessary advanced features

The goal is a reliable, compact and impressive demonstration prototype, rather than a production-ready commercial product.

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Budget & Proposal

Please provide a fixed-price quotation rather than only an hourly rate.

Please separately mention:

- Components
- Firmware development
- PCB design
- PCB fabrication/assembly
- Enclosure/3D printing
- Caregiver interface
- Testing
- Shipping
- Any other charges

Target budget: ₹15,000–₹25,000 for the complete prototype.

If your quotation is higher, please explain what additional work/features are responsible for the increase.

Please include in your proposal:

- Your experience with ESP32 and GSM/cellular modules
- Previous IoT/wearable projects
- PCB design experience
- Whether you can provide a physical assembled prototype
- Estimated completion time
- Total fixed cost
- Examples/photos/links of relevant previous work

Please do not submit a generic Arduino/IoT project proposal. I am specifically looking for someone capable of developing a custom wearable prototype according to the above requirements.