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I need a working ankle-band prototype that pairs over Bluetooth, and vibrates on command. The core metric I care about is interchange rotation—essentially how the ankle twists during movement—rather than the usual step or calorie counters. The device should stream that rotation data reliably to a companion smartphone and store it locally when the phone is out of range. I have a design ready for review I want the vibration motor triggered only when I send a remote manual signal, ideally from a simple mobile app or small handheld controller you will also develop. Automatic or motion-based triggers are not required. I’m looking for an end-to-end solution: compact hardware layout, firmware that captures rotation data at a useful sampling rate, low-latency Bluetooth communication, a basic cross-platform app for iOS and Android to display live graphs/logs and a big on-screen “Vibrate” button, plus clear assembly files so I can have additional units manufactured. If you have existing experience with BLE, haptic drivers, or MEMS gyroscopes/IMUs, that will help us move fast. Deliverables: • Schematic, PCB files, and BOM • Embedded code flashed and tested • Mobile app source and installable builds • One fully assembled, demonstrated prototype • Short setup and usage guide I will review against stable Bluetooth connectivity, accurate rotation readouts, and responsive manual vibration within one second of the app command.
Project ID: 40467409
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58 freelancers are bidding on average $2,352 AUD for this job

As the CEO of ZAWN Tech, a renowned IT and Engineering company with over a decade of experience, I can confidently say that we are the perfect fit for your Bluetooth Vibrating Ankle Band project. Our in-house team of specialized developers and engineers have proven real-world expertise in designing and developing intricate systems just like the one you need. With an in-depth command on BLE, our skills in embedded systems and electronics will ensure that your specially designed band streams rotation data accurately to your companion smartphone through reliable Bluetooth Low Energy technology. Our PCB Design and Layout competencies combined with proficiency in Arduino would guarantee efficient transmission of this data along with responsive manual vibration from the mobile app or handheld controller you want us to develop. Not only will we deliver top-notch schematics, BOM, short setup guide, etc., but also an explained code flashed and fully tested with installable mobile app sources. We aspire to provide you a fully functional prototype assembling all requested features and which demonstrates stable connectivity while giving accurate readings of interchange rotation. At ZAWN tech our aim is simple - turn complicated ideas into reliable, production-ready solutions delivered alongside clear communication and long-term support. Choosing us would be choosing commitment, precision, and excellence!
$3,000 AUD in 30 days
8.9
8.9

As a seasoned Electrical Engineer, your need for an end-to-end solution for your fitness ankle-band prototype aligns perfectly with my skill set. I bring a comprehensive understanding of embedded systems, firmware development, and PCB design, all of which are vital components for this project. My proficiency in core Microcontrollers like STM32, ESP32, TI Tiva, C2000, and NXP LPC will ensure stable Bluetooth connectivity and accurate rotation readouts. Furthermore, my experience is not limited to design and development but extends to AI and ML integration. These intelligent algorithms can prove beneficial in the analysis of the rotation data that your prototype generates. Moreover, as a specialist in IoT product engineering, I can assure you a compact hardware layout that maximizes efficiency without compromising on performance. My dedication doesn't just end with providing you the hardware and software solutions you require. I aim for long-term usability by providing clear assembly files and user guides so that you can manufacture additional units or upgrade as needed in the future. Thus, if you seek a passionate engineer who will deliver on your core metric of interchange rotation while ensuring exemplary Bluetooth functionality and precise vibration control within one second as per your requirement,Ping me!
$3,000 AUD in 30 days
8.4
8.4

Hi there We will develop the solution from scratch and deliver a fully working prototype that can log the data in smart phone using custom built apps. Our offer contains full turnkey solution. Please feel free to contact us. Best Regards Shahbaz.
$3,000 AUD in 60 days
7.5
7.5

With over a decade of experience and expertise in the field of Electronics and Embedded System, I believe my skill set makes me the perfect candidate to bring your Bluetooth Vibrating Fitness Ankle Band design to life. I am highly competent with Arduino, Bluetooth, PCB Design & Layout that are crucial to successfully executing this project. Drawing from my robust background in Digital Motor Control, Analog Design and Electronic Design, I have developed a keen understanding of components like haptic drivers, BLE and MEMS gyroscopes/IMUs which your project requires. My skill in Matlab further enables me to adequately simulate hardware for motor drives; essential to your core metric of interchange rotation measurement. As an added advantage, I have hands-on experience in power electronics and renewable energy solutions that give me an edge in designing efficient battery management systems for your wearable electronic. Most importantly, I commit to delivering a cohesive end-to-end solution right from compact hardware layout design, selection, firmware development using appropriate BLE communication protocols to the development of a basic cross-platform app for iOS & Android devices. My ability to create concise assembly files will further assist you in saving time when additional units need to be manufactured. With stringent focus on stable Bluetooth connectivity, accurate rotation readouts and a prompt manual vibration recording within a second frame as you've specified,
$2,250 AUD in 40 days
7.5
7.5

Hi, I will deliver the complete ankle-band prototype — hardware design with IMU-based rotation tracking, BLE firmware, vibration control, and a cross-platform mobile app with live graphing and a manual "Vibrate" trigger. For capturing interchange rotation accurately, I will pair a high-rate MEMS gyroscope (such as the BMI270) with sensor fusion firmware running at 200 Hz or above, then downsample for BLE transmission while buffering full-resolution data to onboard flash when the phone disconnects. This gives you research-grade rotation fidelity without saturating the BLE link, and no data gaps during out-of-range periods. For the haptic response, a dedicated DRV2605L driver will keep vibration latency well under your one-second threshold. Looking forward to talking through the details. Kamran
$1,710 AUD in 25 days
7.3
7.3

Ankle rotation isn’t a step-counter problem dressed up differently — it’s a sensor fusion and sampling-rate problem. Most BLE wearables drop packets the moment the phone pocket angle changes; the real work is keeping the gyro stream clean and the manual vibrate command under that one-second bar every single time. Why me? ➤ 5+ years designing compact PCBs around ESP32 and Nordic nRF boards — directly applicable to a BLE ankle-band form factor. ➤ Hands-on firmware experience with MEMS IMUs (MPU-6050, BMI270) including gyro calibration, complementary/Madgwick filtering, and local flash buffering for out-of-range storage. ➤ Cross-platform React Native + Expo apps with live BLE streaming, real-time graphing, and a responsive control UI for both iOS and Android from one codebase. ➤ End-to-end delivery under one contract: schematic, PCB, BOM, firmware, mobile app, assembled prototype, and a clean setup guide. ➤ Manufacturing-ready handoff with documented Gerbers and BOM so additional units can be built without coming back to me. ➤ Daily progress updates, 5-minute response during work hours, and 2 weeks free post-delivery support after prototype demo. Open for a short call to review your design files and lock the sampling rate and BLE protocol before we start?
$2,250 AUD in 5 days
6.5
6.5

I can build your ankle-band prototype with reliable rotation tracking and responsive vibration control. Using MEMS gyroscopes, I’ll capture accurate interchange rotation and stream that data via Bluetooth Low Energy to a simple cross-platform app showing live graphs and logs. The app will include a large “Vibrate” button triggering the motor within one second, even handling offline storage when the phone is out of range. I’ve delivered similar projects involving real-time sensor data streaming and custom haptic feedback, solving connection dropouts and ensuring smooth app-device interaction. For your device, I plan to optimize the sampling rate to balance accuracy with Bluetooth bandwidth. How do you prefer rotation data formatted—raw angles or filtered values? Also, should the app support basic export of logged data? I will provide complete PCB files, embedded firmware, and a clear assembly guide so you can scale production. The prototype will be fully assembled and tested to confirm stable Bluetooth, precise rotation metrics, and instant vibration response. Ready to start this end-to-end solution and get your ankle band working exactly as you need.
$2,250 AUD in 7 days
5.3
5.3

With my skills and experience in iOS (Swift, SwiftUI), Android, and Arduino, combined with my deep knowledge of mobile app and backend developments, I believe I am the perfect fit for your Bluetooth Vibrating Fitness Ankle Band project. My specializations align directly with your needs: compact hardware layout, low-latency Bluetooth communication, and a clean mobile app that allows you to track rotation data in real-time on a cross-platform basis. Furthermore, my expertise in MEMS gyroscopes/IMUs would ensure that your device's rotation tracking is both accurate and reliable. I am also well-versed in BLE technology and can leverage this proficiency to guarantee stable Bluetooth connectivity throughout the user experience. Compatibility of our application across both iOS and Android developed by me renders an extra convenience. Above all else, I am dedicated to providing functional yet user-friendly solutions that directly address my clients' business concerns. Being highly committed to timeliness and quality, you can trust me with the delivery of an end-to-end solution exceeding your expectations.
$2,250 AUD in 7 days
5.5
5.5

Hi, I’m excited about your project to build a Bluetooth vibrating fitness ankle band focused on interchange rotation metrics. With my solid experience in embedded systems, BLE communication, and mobile app development, I am confident in delivering a reliable end-to-end solution. I will design compact hardware with a MEMS gyroscope to stream rotation data to your companion app, ensuring local storage when the phone is out of range. The firmware will capture rotation data at a precise sampling rate, and the app, built cross-platform for iOS and Android, will feature live graphs and a simple, responsive vibrate command button to trigger the motor manually. The deliverables will include detailed schematics, PCB files, BOM, tested embedded code, app source and builds, plus one fully assembled prototype tested to your standards. I aim to complete this within three weeks, with regular updates and priority on stable BLE connectivity and user experience. What specific sampling rate do you envision for capturing the ankle rotation data to ensure optimal accuracy? Best regards,
$2,500 AUD in 16 days
5.2
5.2

Hello, I’ve reviewed your requirement for a Bluetooth-enabled vibrating ankle band that captures ankle rotation using an IMU, streams data via low-latency BLE, stores it locally when out of range, and triggers vibration only through a manual command from a mobile app or controller. I will design a compact embedded solution using an IMU (gyro/accelerometer), BLE SoC, and haptic driver, with firmware for precise rotation sampling, stable BLE communication, and offline buffering. I will also develop a cross-platform iOS/Android app with live rotation graphs, logs, and a large instant “Vibrate” button optimized for sub-second response. Deliverables include full PCB schematic and layout, BOM, optimized embedded firmware, tested BLE stack, mobile app source code with installable builds, one fully assembled prototype, and clear setup documentation. As a Preferred Freelancer on Freelancer.com—top 1%—I ensure reliable hardware-software integration and fast iterative development. Q1: What sampling rate and IMU resolution do you need for accurate ankle rotation tracking during real movement use cases? Q2: Do you prefer a specific BLE MCU platform (nRF52, ESP32) or should I select the most power-efficient option for this design? Best regards, Asif Nawaz Baloch SoasTech
$3,000 AUD in 14 days
4.7
4.7

Are you looking for a compact BLE-enabled wearable prototype that can accurately track ankle rotation and provide reliable remote-triggered haptic feedback in real time? I’m an Electrical & Embedded Systems Engineer with 5+ years of experience in PCB development, BLE communication, IMU integration, firmware architecture, and mobile-connected embedded devices. Your project is very achievable using a low-power BLE MCU combined with a high-precision 6-axis/9-axis IMU and dedicated haptic driver. Scope I Can Support: I can develop the complete end-to-end prototype including: Compact ankle-band electronics with rechargeable battery system Custom PCB and enclosure-ready hardware layout BLE firmware with stable low-latency communication IMU-based interchange rotation tracking and local buffering/storage Remote vibration triggering from mobile app or handheld BLE controller Cross-platform mobile app (iOS + Android) with: Live rotation graphs/logs Connection monitoring Data export Large “Vibrate” control button Offline logging + sync when reconnected Deliverables: Schematic, PCB, Gerbers, and BOM Fully programmed firmware source Mobile app source + installable builds Assembled and tested working prototype Setup/testing documentation Manufacturing-ready files for future production Best regards, Hasan A.
$1,500 AUD in 5 days
3.7
3.7

I understand that your primary concern is developing a Bluetooth-enabled ankle band prototype that accurately captures and streams rotation data while allowing for manual vibration control. With 12+ years of experience in embedded systems and mobile app development, I am well-equipped to deliver a comprehensive solution. Utilizing BLE technology, I will design the compact hardware layout and firmware necessary for reliable communication. For the mobile application, I can implement a cross-platform solution using Flutter or React Native, ensuring seamless integration with both iOS and Android devices. My expertise in Appium and Playwright will also facilitate robust testing of the app's functionality. Deliverables will include schematic files, PCB layouts, embedded code, a fully functional prototype, and user documentation for setup. My focus will be on achieving stable connectivity and responsive controls to meet your specifications. To ensure we are aligned on expectations, could you clarify if there are specific requirements for the data logging feature when the device is out of range?
$3,000 AUD in 7 days
3.4
3.4

Hi, I can help build the ankle-band prototype end to end, including BLE hardware architecture, IMU-based rotation tracking, vibration control, firmware, and a simple iOS/Android companion app. For this prototype, I would likely use a BLE-capable microcontroller, MEMS IMU/gyroscope, vibration motor driver, rechargeable battery circuit, local flash storage, and firmware that streams rotation data to the app while caching data when the phone is out of range. The mobile app can show live rotation graphs/logs, connection state, stored-session sync, and a large manual “Vibrate” button with response tested under one second. I’ve worked with embedded systems, BLE communication, mobile apps, sensor data pipelines, firmware logic, prototyping workflows, and hardware/software integration. The most important early step is reviewing your existing physical design so PCB size, battery, enclosure constraints, vibration placement, and sensor orientation are considered before final schematic/PCB layout.
$2,000 AUD in 20 days
3.0
3.0

Hello, and thanks for the detailed brief on the Bluetooth Vibrating Fitness Ankle Band. I’m ready to deliver a compact, end‑to‑end prototype that focuses on interchange rotation as the core metric, with reliable BLE streaming to a companion app and local data storage when the phone is out of range. I will base the hardware on a compact PCB layout that houses a MEMS IMU, a precise small vibration motor, and a BLE 5.0 radio, all designed for low latency and robust pairing. The firmware will sample rotation data at a practical rate (tuned for stable capture of ankle twist), timestamp it, and stream it to iOS and Android devices with a simple, responsive app showing live graphs/logs and a prominent “Vibrate” control. The app will include a manual trigger that sends a remote command to the ankle band to energize the haptic driver within sub-second latency, and it will cache rotation data locally when offline. Deliverables cover schematics, PCB, BOM, tested embedded code, mobile app sources and builds, a fully assembled prototype, and concise setup instructions. I also prepare clear assembly files for scalable manufacturing. I strongly emphasize stable Bluetooth connectivity, precise rotation readouts, and a responsive one‑tap vibration command, with a design review aligned to your existing CAD drawings. Best regards,
$2,000 AUD in 20 days
1.5
1.5

Hello, I carefully reviewed your ankle-band prototype requirements, and this aligns strongly with my experience building BLE-enabled wearable devices, IMU/gyroscope telemetry systems, haptic-feedback hardware, embedded firmware, and cross-platform mobile control applications. Your project is very achievable with an ESP32/nRF52-class BLE MCU paired with a compact IMU and vibration driver architecture. I understand the key requirement is accurate ankle rotation/interchange tracking with reliable manual haptic triggering — not generic fitness tracking. I can help build: • Compact BLE ankle-band hardware prototype • IMU/gyro-based rotation sensing pipeline • Reliable BLE streaming + local offline buffering • Low-latency vibration triggering (<1 second) • Cross-platform iOS/Android companion app • Live graphs/logging dashboard • Manual “Vibrate” control interface • Firmware with configurable sampling rates • Manufacturing-ready PCB/schematic/BOM files Regards Arun
$2,500 AUD in 15 days
0.4
0.4

❤️ Wishing you a wonderful day. ❤️ As a full-stack web developer with specific expertise in mobile app development for both iOS and Android, I strongly believe I'm the best fit for your project. From building dashboards to real-time interfaces, I have ample experience in creating user-friendly and performance-centric apps that can display live graphs/logs, exactly what you require. My knowledge in using APIs will also aid smooth integration of your app with the device. But my skills don't end there - I've also got impressive capabilities in CRM which can contribute to creating an efficient task automation system as you desire; a perfect addition to what you need. And since you care about data analytics, my proficiency in developing ETL pipelines and using BI tools can help transform the raw rotation data into actionable insights. Last but not least, besides creating a great Bluetooth connectivity and ensuring accurate rotation readouts with low-latency communication, I fully understand the importance of design files. I guarantee clear and precise assembly files alongside SCH/PCB files, BOM list, embed code and mobile app source - all necessary to guarantee successful execution even if additional units are needed. Rest assured, choosing me would mean leveraging on my years of experience to deliver nothing short of perfection. Count on me to create a fully functional ankle band prototype to meet your needs exactly! ❤️ Thank you. ❤️
$1,500 AUD in 4 days
0.0
0.0

As a seasoned professional with extensive experience in embedded systems, iOS development, mobile app development, and prototyping, I possess the skills needed to make your innovative concept a reality. My ability to leverage strategic data-backed marketing strategies means that I can not only deliver on functional requirements but also ensure the overall design coincides with compelling user experience - an element often overlooked but vital for product success. With over half a decade's worth of involvement in the field of digital marketing and automation, my experience includes working extensively with Bluetooth Low Energy (BLE), which is central to your project. These past projects have given me a deep understanding of BLE’s intricacies such as reliable data streaming over distances and managing power consumption. Additionally, my comprehensive grasp of motion sensors such as MEMS gyroscopes/IMUs, haptic drivers for vibration motors, and cross-platform mobile app development positions me uniquely to engineer an effective and intuitive solution tailored specifically to your needs. My commitment to delivering précised results, clearly communicated solutions, and measurable outcomes aligns perfectly with the comprehensive end-to-end solution you’re seeking. Together we can transform your concept into a robust, manufacturable prototype that exceeds all your expectations. Let's create the future!
$2,250 AUD in 7 days
0.0
0.0

The BLE pairing and vibration trigger are the two core pieces here. For the firmware I would use an Arduino-compatible BLE module, and for the app I can build in Flutter to cover iOS and Android from one codebase. Once the GATT profile is set up, the vibration motor control is straightforward. I can start today and have a working prototype ready in about 3 weeks. The bid reflects the post as written and may adjust once we go through the full hardware spec together. Want to jump on a quick call?
$1,800 AUD in 45 days
0.0
0.0

Most failures on projects like this come from underestimating IMU drift, BLE dropouts, and the latency trade-offs between streaming high-rate orientation data and staying battery-friendly — those are the real risks we need to design around up front. I propose a focused prototype: an ankle PCB with a high-rate IMU and on-device sensor fusion that streams compact orientation (quaternion/roll-pitch) at 100–200 Hz when connected, with a circular flash buffer for disconnected periods. A simple GATT characteristic will accept a “vibrate” write so either the mobile app or a small handheld controller can trigger haptics with <1 s response. I’ll deliver PCB, BOM, firmware, React Native app (iOS/Android) with live graphs and a big Vibrate button, plus assembly files and a tested prototype. Recommended stack: Nordic nRF52840 (BLE + DFU), ICM-20948 or BNO085 IMU (fusion offload option), DRV2605L haptic driver, Zephyr or nRF Connect SDK for firmware, KiCad for PCB, React Native + react-native-ble-plx for the app. I’ll include OTA DFU support, modular firmware for future sensors, and clear manufacturing notes so units scale easily. Similar work: I led development of ReThinkology — a React Native health app with a low-latency “Reset” trigger and real-time telemetry, which translates directly to the mobile UI and BLE reliability you need. If that sounds good I can review your design and start a 15‑minute scoping call. Do you want both a standalone handheld BLE button (separate device) and the mobile app, or should I focus on phone + optional accessory later?
$2,250 AUD in 7 days
0.0
0.0

꧁⎝ ༺ Glory to Client ༻ ⎠꧂ Your project is very interesting because it combines embedded systems, BLE communication, IMU-based motion tracking, haptic feedback, and cross-platform mobile integration into one tightly coupled wearable prototype. I understand that the core requirement is not generic fitness tracking, but accurate ankle rotation/interchange measurement using gyroscope/IMU data with reliable realtime BLE streaming and local buffering when disconnected. I have experience working with: * BLE device architecture * embedded firmware development * IMU/gyro sensor integration * haptic motor drivers * realtime Bluetooth communication * mobile companion applications * low-power wearable device workflows * PCB/prototype system design For your prototype, I would structure the system around: * compact BLE MCU platform (Nordic ESP32 or similar depending on constraints) * MEMS IMU/gyro integration * onboard data buffering/storage * low-latency BLE communication * vibration control subsystem * cross-platform iOS/Android companion app * live graphing and telemetry visualization The app would include: * stable BLE pairing/reconnection * realtime rotation graphs/logs * local session storage * large manual “Vibrate” trigger button * device status/battery indicators I'd be happy to review your current industrial/design concepts and discuss sensor selection, BLE architecture, battery constraints, and manufacturing strategy further. Best regards
$1,750 AUD in 15 days
0.0
0.0

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