
Closed
Posted
Paid on delivery
I want to build a small, comfortable wearable that tracks every phase of my breathing in real time. It must • measure the volume of each inhalation and exhalation, • time how long a breath is held, • log overall breathing rate, and • capture heart-rate variation alongside those metrics. A bright, integrated display should show the live readings on the wrist or chest unit itself, while Bluetooth LE streams the same data to phones, tablets, or a desktop dashboard for deeper analysis. On-board storage is essential so nothing is lost when the companion app is closed or the phone is out of range, and the stored sessions should sync automatically once a connection is re-established. I need a freelancer who can take the project from sensor selection through to a tested prototype, including firmware that collects and calibrates the data, the enclosure design that keeps the form factor lightweight, and a simple reference app or desktop viewer that proves the live-data feed works. Acceptance criteria • Accurate readings within standard spirometry tolerances for volume, ±5 % for heart rate. • Continuous operation for at least eight hours on a single charge. • Reliable Bluetooth connection with no data loss at 5 Hz sampling. • CSV or JSON export of stored sessions. If you have experience combining respiratory sensors with BLE micro-controllers and can demonstrate a working proof-of-concept rapidly, let’s talk about bringing this wearable to life. should work with iOS and android and watch os and android watch operating system
Project ID: 39715811
11 proposals
Remote project
Active 11 days ago
Set your budget and timeframe
Get paid for your work
Outline your proposal
It's free to sign up and bid on jobs
11 freelancers are bidding on average ₹9,045 INR for this job

Hello, I’m Abbas Jawadwala, Co-founder at SMB ElectroTech. With 5+ years of experience, I’ve delivered projects in PCB layouts, embedded firmware, power electronics, and product development for clients worldwide. I focus on robust, manufacturable designs with clear communication and on-time delivery. Happy to discuss your project details—I’m available this week for a quick call to get started. Best, Abbas
₹7,000 INR in 7 days
5.9
5.9

Building upon my 10 years as a top-rated developer, I am more than congratulatory to support you with your Smart Wearable Respiratory Monitor project. Alongside my team of over 20 professional developers, we are well-versed in a range of services that encompasses mobile development (including iOS), firmware design, web services and data analysis. Our expertise aligns with the technical demands of this project from sensor selection to calibration, firmware development, and visualizing data through apps or desktop dashboards. I understand the utmost importance of accuracy in projects like this and assure compliance with standard spirometry tolerances for volume (±5%) as well as heart rate measuring. Additionally, my proficiency in Bluetooth LE ensures reliable data streaming and syncing even at high sampling rates (5 Hz). Efficiently-structured JSON or CSV export for stored sessions is also guaranteed.
₹9,999 INR in 7 days
4.0
4.0

As a seasoned full-stack developer, I possess a unique combination of skills that makes me an ideal fit for your wearable respiratory monitor project. I have deep expertise in both mobile app development - specifically android and iOS which aligns perfectly with your requirement to be compatible with these operating systems. Plus, my proficiency in emerging technologies like Blockchain and AI gives me an added edge in crafting innovative monitoring solutions. I understand that accurate data is crucial for this wearable and that's why, for every project I undertake, precision is always my priority. Volume measurements within standard spirometry tolerances and providing ±5% accuracy for heart rate is not just a requirement for me but a principle that I always adhere to. Moreover, I have extensive experience working with Bluetooth Low Energy technology, ensuring reliable connections with no loss of data as demanded in your project. Another key aspect of successful wearable technology is optimum battery usage. To ensure continuous operation for at least eight hours on a single charge, I'll invest time in understanding the power consumption patterns during the design phase itself and optimize the software accordingly. Additionally, generating CSV or JSON exports of stored sessions rank high on my priorities list hence you can rely on a seamless sync and storage system.
₹10,000 INR in 3 days
3.1
3.1

We have developed similar devices in the past, which gives us a strong foundation to design and prototype your product with both functionality and visual appeal in mind. Using CAD tools like SolidWorks and Fusion 360, we can create precise 3D models that are ready for testing, refinement, and manufacturing. The design will be optimized for prototyping techniques such as 3D printing, CNC machining, or custom fabrication, depending on your requirements. We also have experience working with non-standard and alternative materials—including composites, engineered woods, and custom polymers—to achieve unique product aesthetics and performance. Being Delhi-based, we can collaborate closely with you to ensure the prototype is not only practical for testing but also visually compelling for presentations, demonstrations, or market validation.
₹7,000 INR in 7 days
2.3
2.3

Hi, I’m confident I can help you bring it to life. With a strong background in embedded systems, Bluetooth LE integration, and sensor interfacing, I can guide the project from hardware selection through to a fully tested prototype. I have experience working with respiratory flow and pressure sensors, PPG-based heart-rate monitors, and low-power microcontrollers that can handle real-time data acquisition while maintaining efficient battery usage. You can see few of my previous projects in my portfolio. I am looking forward to further discuss this project.
₹7,000 INR in 7 days
1.8
1.8

Hi i have mor ethan 10 years experienced in circuit design and development in my past i have designed lot oximter design for companies i can design best way under emimec
₹7,000 INR in 7 days
0.0
0.0

Hello! I’m Karthik, a seasoned hardware and firmware engineer with 10+ years of experience in wearable devices, IoT, and mobile integration. I can take your Smart Wearable Respiratory Monitor from concept to a fully tested prototype. I will handle: • Sensor selection for accurate respiratory volume, breath-hold timing, heart-rate variability. • Firmware development for real-time data collection, calibration, and on-board storage. • Lightweight, ergonomic enclosure design suitable for wrist or chest. • Bluetooth LE streaming to iOS, Android, watchOS, and Android watches. • Companion app or desktop viewer for live data and session export (CSV/JSON). I ensure: • Spirometry-standard accuracy, ±5% HR tolerance. • 8+ hours continuous operation on a single charge. • Reliable 5 Hz BLE connection with no data loss. I’ve successfully delivered similar wearable projects integrating biosensors, BLE, and multi-platform apps. I can provide a rapid proof-of-concept and guide the project through full testing and refinement. Let’s discuss the details and bring this innovative respiratory monitor to life.
₹22,000 INR in 7 days
0.0
0.0

Basic solution - Delivery in 10 days for ₹8,000.00 → Includes a $500 engagement fee. Provides a basic functions. Essential Option – Functional Project: Delivery in 14 days for ₹10,000.00 → Includes a $500 engagement fee. Provides a fully functional and efficient solution, tailored to essential needs. Premium Option – Professional Project: Delivery in +20 days for₹12,000.00 → Includes a $500 engagement fee. Guarantees a complete, optimized, and professional-quality result.
₹8,000 INR in 10 days
0.0
0.0

Hi there, Your wearable breathing and HRV tracker idea is exciting, and our team can take it from sensor selection to a tested prototype. We specialize in IoT wearables, BLE medical devices, and mobile apps. Our approach: Sensors: Use MEMS airflow sensor for breath volume + PPG sensor for HRV. Hardware: BLE MCU (nRF52/ESP32), onboard storage, Li-Po battery for 8+ hrs, OLED/TFT display, lightweight 3D-printed enclosure. Firmware: Written in C/C++, detects inhalation/exhalation/hold, calculates HRV, logs CSV/JSON, ensures reliable BLE sync at 5 Hz. Companion App: Cross-platform (Flutter/React Native) for iOS, Android, watchOS, and Wear OS. Shows live data, auto-syncs stored sessions, and supports export. Prototype Build: Ergonomic, sweat-resistant, comfortable for daily wear. Acceptance criteria covered: spirometry-grade accuracy, ±5% HR, ≥8 hrs runtime, robust BLE, reliable offline-to-online sync. Deliverables: full source code, tested firmware, enclosure design, reference app, and documentation. Best regards, Shuvadeep.
₹7,000 INR in 7 days
0.0
0.0

New Delhi, India
Member since Jul 10, 2023
₹12500-37500 INR
₹1500-12500 INR
₹1500-12500 INR
$15-100 USD
$15-25 USD / hour
$5000-10000 NZD
₹1500-12500 INR
₹12500-37500 INR
$3000-5000 USD
$30-250 USD
€250-750 EUR
$100-500 AUD
$20-30 NZD / hour
₹500-600 INR / hour
$15-25 CAD / hour
₹12500-37500 INR
$250-750 USD
$50-150 USD
₹12500-37500 INR
$250-750 USD
$30-250 USD
$25-50 USD / hour