Wearable Sensor Vest Prototype — GPS/IMU + Heart Rate (PCB, Firmware, Enclosure)

@Mahihassi

With my extensive background in electrical engineering and deep knowledge of wearable technology, I am confident that I can deliver a groundbreaking prototype for your wearable sensor vest project. My master's degree in Embedded Systems and experience in every step of the product development cycle, from system architecture to physical enclosure design, has equipped me with the skills necessary to create a high-functioning vest that accurately tracks the movements and heart rate of athletes. Fundamentally, I am skilled in circuit design, embedded firmware development, and PCB layout—skills crucial for integrating multiple sensors like GPS, 9-axis IMU, and the heart-rate monitor into a cohesive system. Furthermore, I possess a keen understanding of various microcontrollers including STM32 and Nordic nRF52/nRF53; making me innovative in producing lightweight solutions while achieving maximum battery life. My portfolio is conclusive of SPORT products specifically motion control systems for sports equipment—thus proficieident to make a reliable sweat-resistant wearable.

@MuhammadUzair16

Hi, I am an embedded systems engineer with over 16 years of experience. I have developed low-power sensor products covering GPS/IMU integration, BLE firmware, PCB bring-up, battery design, and compact enclosures, taking consumer products from concept through production handoff. Relevant private work cannot be posted publicly but can be shown privately under NDA. For this sports vest, I recommend single-lead ECG using snap or textile chest electrodes rather than back-mounted PPG. It should provide more reliable heart-rate and RR data during movement while avoiding many optical motion and skin-contact issues. I would validate electrode comfort and signal quality first. My phased approach is: week 1 sensor and ECG validation on development hardware; weeks 2–4 schematic, PCB, BLE logging firmware, and enclosure; weeks 5–6 assembly, bring-up, runtime, movement, and integration testing. Itemized estimate: - Hardware, PCB, power design, and bring-up: 45 hours / ₹50,000 - GPS, IMU, ECG, and BLE firmware: 60 hours / ₹55,000 - Enclosure, assembly, and system testing: 30 hours / ₹30,000 Total: 135 hours / ₹135,000 over 6 weeks. Do you require raw ECG/IMU streams, or only processed heart-rate and movement metrics? I would be glad to discuss the details and define clear phase-one acceptance tests.

@Adeel2k14

Hi I can help you in this task my expertise and experience are related to your task, i can deliver you a complete working prototype as per your needs. So far i have more than 8 years of experience in developeing PCB and working prototype i can show you my previous work sample for your reference. Looking forward to your response. Best Regards, Muhammad Adeel

@tshibsamuel477

Hi there, I read your offer and hardware brief carefully and understand that you need a first working prototype of a wearable sensor vest for athlete movement tracking, GPS/9-axis IMU data, heart-rate/HRV sensing, BLE transmission, battery operation, and a lightweight sweat-resistant removable module. I can support the schematic, PCB design, sensor/module selection, firmware, BLE data transmission, battery and power design, 3D-printed enclosure, prototype assembly support, and validation testing. For heart-rate sensing, I would recommend starting with optical PPG for this prototype because it is compact, easier to integrate, and suitable for early validation, while keeping ECG as a possible later option if motion artifacts become a major issue. My background in mechatronics, embedded systems, wearable sensors, BLE devices, PCB design, firmware, IMU/GPS integration, and battery-powered prototypes fits this project well. I would suggest a phased approach: first validate the GPS/IMU, BLE, and PPG sensor choice, then move to custom PCB, enclosure, firmware integration, and full prototype testing within the 4–8 week target. Best regards, Samuel Tshibangu

@sahildogra222

Hey, You are looking for Wearable Sensor Vest Prototype — GPS/IMU + Heart Rate (PCB, Firmware, Enclosure). "Lets Gets Started, I know you have several tempting proposals here, but I guarantee you to be impressed by my work. I have various skills in design, Illustration, Photoshop, Graphic Design, Logo Design and Illustrator. If you give me this chance you will be impressed, because I guarantee that I will meet your expectations. I invite you to get a look at my portfolio You Can see it from here : https://www.freelancer.com/u/sahildogra222 If you have any questions or queries, do not hesitate to contact me. I hope to start working with you. With regards! SAHIL

@yaroslavmark

Hi, I have 10+ years of embedded hardware development experience and have delivered 80+ PCB/firmware projects covering wearable IoT devices, BLE/GPS systems, motion sensing, and battery-powered products, with multiple designs successfully manufactured and field-tested. My recommendation for this prototype is an optical PPG sensor because it provides reliable heart rate data during athletic activity with lower integration complexity than ECG while meeting the project's first-prototype objective. Approach ✅ I will select suitable BLE, GPS, IMU, and PPG modules and design a compact, low-power PCB. ✅ I will develop firmware for sensor acquisition, BLE communication, and battery management. ✅ I will design a lightweight 3D-printed enclosure and test the complete wearable prototype. Questions ✅ I would like to know your preferred GPS position update rate and IMU sampling frequency for the required movement analysis. ✅ I would like to know whether HRV accuracy is a mandatory requirement for this prototype or if reliable heart-rate tracking is sufficient for Phase 1. ✅ I would like to know whether BLE data should be transmitted using a custom GATT profile or integrated with an existing tablet application/API. Best, Yaroslav

@danish2051

I am an Embedded Systems Engineer with hands-on experience in ESP32, STM32, Arduino, IoT solutions, PCB design, and industrial automation. I specialize in developing complete hardware and firmware solutions from concept to production. My experience includes sensor integration, wireless communication, data logging systems, Ethernet and Wi-Fi connectivity, MQTT communication, cloud integration, and custom PCB development. My expertise includes: • ESP32 Firmware Development • STM32 Firmware Development • Arduino Projects • PCB Design using Altium Designer • IoT Solutions (Wi-Fi, BLE, Ethernet, MQTT) • AWS IoT Integration • Sensor Integration and Calibration • Data Logging Systems • Industrial Automation Projects • Embedded Linux Development • Serial Communication (UART, RS485, Modbus) • I2C, SPI, CAN Bus Development • Product Prototyping and Testing Recent project experience includes: • ESP32 Ethernet-based monitoring systems • BLE sensor networks with multiple wireless nodes • Engine dynamometer data acquisition systems • Industrial pressure, temperature, RPM, and level monitoring systems • MQTT-based cloud monitoring solutions • Custom PCB design and manufacturing support I focus on delivering reliable, well-documented, and production-ready solutions while maintaining clear communication throughout the project. Let's discuss your project requirements and build an efficient solution together.

@shadabkhan92

https://www.freelancer.com/projects/embedded-systems/Sensor-based-Stress-Management-Wrist.html have done similar project. Lets connect in the chat to discuss properly.

@alluankit01

Hi, I can build the first working prototype of your wearable sensor vest with GPS/9-axis IMU, heart-rate sensing, BLE transmission, PCB design, firmware, enclosure, and test documentation. The best solution is to use a phased approach: first validate sensor selection and placement, then complete PCB design, firmware, enclosure, assembly, and testing. For heart rate, I recommend **PPG for the first prototype** because it is lighter, lower-power, easier to integrate, and better suited for a vest insert, with motion filtering handled in firmware. I’m comfortable with wearable sensors, GPS/IMU modules, BLE firmware, battery-powered embedded systems, PCB layout, 3D printed enclosures, sensor integration, and prototype testing. Itemized estimate: * Hardware/PCB design: ₹45,000 * Firmware and BLE: ₹50,000 * Enclosure/prototype support: ₹35,000 Deliverables include: * Schematic and PCB design * GPS + 9-axis IMU firmware * PPG heart-rate integration * BLE data transmission * Battery/runtime planning * Lightweight enclosure design * Working testable prototype * Setup and test notes Timeline: **4–8 weeks**. I’ll focus on a practical, lightweight prototype within the weight and battery-life targets. Best regards Ankit

@shenglin0617

Hi, I build BLE wearables for a living. My last one was a body worn vitals module on nRF52840 with ECG, PPG, temperature and Li-Po charging. Schematic, 6 layer PCB and firmware were all mine. For HR during sport I would put PPG (MAX86141) first, with IMU accel data feeding motion artifact rejection, and keep a 2 lead ECG footprint on the same board in case you later want beat to beat accuracy. PPG sits far better in a vest than wet electrodes. I design in Altium, so antenna keepout, impedance control and 3D fit against the vest insert are checked before fab, not after. 150g and 4h are comfortable targets with a 400mAh cell. Phase 1, 2 weeks, 30k INR: validation board, real PPG vs ECG data on a moving athlete. Phase 2, 3 weeks, 85k INR: schematic, PCB, firmware, BLE link. (Will be divided into several milestones) Phase 3, 1 week, 20k INR: enclosure, assembly, test report. (but honestly, I am not do enclosure myself so it would be better to exclude assembly. Anyway, if you want, I will try to help this.) I can share the recent relevant project once you open a chat. Best regards, ShengLin Gu.

@XRProConnect

Hi, Aashiq here from Cape Town, South Africa. This project instantly caught my eye, so I had to reach out. I see you’re looking for a prototype of a wearable sensor vest that tracks athlete movement and heart rate. That’s an exciting challenge, and I love working on innovative projects like this. With years of experience in developing wearable technology, I’ve helped brands create functional prototypes that enhance user experience and performance. I can deliver a working prototype with robust PCB design and firmware integration. Feel free to request samples of my previous projects, which showcase successful wearable solutions. Based on what you mentioned, here is how we would approach the project: - Design the schematic and PCB for GPS, IMU, and heart rate sensor - Develop firmware for data collection and BLE transmission - Create a lightweight, 3D-printed enclosure for initial testing - Conduct thorough prototype testing to ensure functionality Rest assured, I prioritize clear communication and will deliver a seamless, user-focused solution optimized for performance. Best Regards, Aashiq

@Webslinger01

Here's what I bring to this: → I built a BLE sports wearable with 400Hz IMU sampling, sub-5µA sleep current, and a 150mAh LiPo lasting 4.5 hours active — that's your exact battery target, already proven → I designed a custom equine performance wearable with on-device gait classification from IMU data, handling real-world motion in a rugged enclosure — the sensor fusion and packaging challenges are directly transferable → I handle the entire stack in-house — schematic, PCB layout, firmware, and 3D-printed enclosure — so there are no vendor handoffs and no coordination overhead → My lab has the test equipment and 3D printers on hand, meaning we iterate on the physical prototype in days, not weeks On heart rate sensing: go with optical PPG. The MAX86141 or similar handles motion artifacts reasonably well, and it's far easier to integrate into a vest than ECG, which needs stable electrode contact that shifts during activity. PPG gives you a solid first prototype; we can validate ECG later if you need clinical-grade accuracy. Happy to walk you through my approach and past work on a chat — the equine wearable project is particularly relevant to what you're building.

@Dikshalikha

Hi, I'd love to work on your project. I have experience developing embedded hardware, IoT devices, wearable electronics, custom PCB design, BLE communication, and sensor integration from prototype to working hardware. For a first prototype, I'd recommend an **ECG-based heart rate sensor** as it provides more reliable readings during high-motion athletic activities compared to PPG. I can deliver the complete schematic, PCB, firmware, 3D-printed enclosure, and a fully functional prototype. I'm also happy to follow a phased development approach to reduce risk and meet your 4–8 week timeline. I'd be happy to share similar embedded hardware projects from my portfolio. Best regards, Diksha L

@soniaer987

Your wearable sensor vest for athlete tracking is exactly the kind of project I enjoy most — it pulls together low-power hardware, sensor fusion, and a real-world physical constraint like that 150g target, which is where the actual engineering challenge lives. I've built similar battery-constrained wearable systems before, including a sports performance tracker on Nordic hardware that had to run for days on a coin cell, so I know the trade-offs you're facing around power, weight, and sweat resistance. Here's what I bring to this: → I cover the full stack myself — schematic, PCB layout, firmware, and 3D-printed enclosure design all in-house, so there are no handoffs slowing us down → I have a fully equipped lab with oscilloscope, logic analyzer, and 3D printers ready to go, so we can iterate quickly on the physical prototype My approach: → Then I'd design a compact 4-layer PCB integrating the GPS module, 9-axis IMU, and your chosen heart rate sensor, optimizing for the vest form factor and battery life, followed by firmware development for sensor fusion and BLE streaming Happy to walk you through my approach and past work on a chat — I think you'll find the equine wearable case study particularly relevant to what you're building here.

@jb095

With over a decade of experience as an embedded systems engineer, I am well-equipped to tackle the challenges of your wearable sensor vest project. My expertise in hardware design, firmware development, and PCB layout perfectly aligns with your needs. Chasing ultra-low power consumption, reducing weight, and achieving optimal signal integrity are areas in which I excel, making me ideal for this particular project. For your heart rate sensing requirement, I would advocate for the optical/PPG approach at this prototyping stage due to its efficiency under physical activities. Coming from a position of strong familiarity with sensor acquisition, I believe integrating it seamlessly into the vest can be achieved without compromising on comfort or performance. Considering your timeline and potential risk mitigation, I propose a phased approach that'll deliver value in shorter intervals while maintaining strict adherence to your quality standards. My extensive experience with nRF52 series including BLE means faster results with reduced debugging time. I am confident that my capability combined with my commitment to delivering reliable technical solutions even on tight schedules makes me an excellent fit for your project. Looking forward to the opportunity!

@rfandelectronics

As a team of highly skilled and experienced electronics and embedded systems engineers, we are confident that we can build a superior wearable sensor vest prototype for your athlete monitoring project. Our extensive skill set in RF & microwave circuit design and high-frequency PCB layout make us uniquely qualified for this task. We understand the importance of delivering solutions that optimize performance and guarantee reliability; qualities key to your product's success. In terms of specific expertise you require, our proficiency in embedded system development using platforms like Arduino, ESP, C/C++ aligns perfectly with the scope of this project. We are adept at schematic + PCB design and have vast experience in 3D printing enclosures. Additionally, our familiarity with BLE for data transmission will ensure efficient communication between the vest and your tablet/laptop. Regarding heart rate sensing, we recommend an optical/PPG-based approach for the first prototype considering its appropriateness during physical activity/sport. While ECG offers higher precision, it may not be comfortable or practical during rigorous movements. Rest assured that whatever method you choose, we will deliver a solution that meets both your specifications and user needs. Given our combined skills, we propose an itemized estimate encompassing hardware design, firmware development, and enclosure construction.

@anjalio22

I would like to take this opportunity to handle your Wearable Sensor Vest Prototype project. I have experience in embedded hardware design, PCB development, sensor integration, BLE communication, firmware development, and 3D enclosure design for prototype products. For this vest, I recommend using an optical PPG-based heart rate sensor for the first prototype because it is lightweight, comfortable, and suitable for continuous sports monitoring when properly positioned. ECG can provide higher accuracy but requires better skin contact and electrode placement, making it less practical for an initial wearable vest prototype. My proposed workflow: • Hardware: Sensor selection, schematic design, PCB layout, power management, and BLE integration. • Firmware: IMU/GPS data acquisition, heart rate processing, BLE data transmission, and basic testing. • Mechanical: Lightweight sweat-resistant enclosure/garment insert design with 3D-print-ready files. Estimated effort: • Hardware design & PCB: 40–60 hours • Firmware development: 50–70 hours • Enclosure design: 15–25 hours • Prototype testing & integration: 20–30 hours Total timeline: 4–8 weeks depending on component availability and testing cycles. I also recommend a phased approach starting with a sensor validation prototype before final PCB and enclosure development to reduce risk.

@ameliaj62

Hey Mate , Good morning! I am very interested in your project - Wearable Sensor Vest Prototype — GPS/IMU + Heart Rate (PCB, Firmware, Enclosure) because I am very skilled at Electronics, Product Design, Sensor Integration, PCB Layout, Bluetooth Low Energy (BLE), Electrical Engineering, Embedded Systems, 3D Printing, Firmware Development and Prototyping. Please send a message to discuss more regarding this project. Thank you for your attention

@ameliaj28

Hello Mate!Greetings , Good morning! I am an expert engineer with skills including 3D Printing, Electronics, Electrical Engineering, Sensor Integration, PCB Layout, Product Design, Firmware Development, Prototyping, Bluetooth Low Energy (BLE) and Embedded Systems. I am very confident about your project - Wearable Sensor Vest Prototype — GPS/IMU + Heart Rate (PCB, Firmware, Enclosure). I think I am a good fit for you project. Please send a message to discuss more regarding this project. Looking forward to hearing from you soon