Firmware Developer Needed for Wearable Device (nRF52832, BLE, Haptics)

@LiveExperts

Hello, As an accomplished firmware developer with years of experience in the domain, I believe I could be an invaluable asset to your wearable device project. My team at Live Experts LLC has established a reputation for delivering high-quality work that meets and exceeds client expectations. Specifically, my proficiency in working with the nRF52 chipset and BLE is something that you seem to be seeking for this project. I hold a strong background in electronics and embedded systems, which are directly applicable to your proposed tasks such as handling battery management, BLE communication, and implementing low-power modes. Additionally, my expertise extends to haptic feedback control, a skillset that aligns perfectly with your requirement to develop haptic patterns using DRV2605L. My main focus lies in converting ideas into reality, ensuring overall client satisfaction at each step. Although I can handle both PCB and firmware design comfortably, I understand if you prefer a separate freelancer for each role. Either way, my ability to collaborate effectively with other team members is remarkable. Combining our efforts would yield a cohesive product rooted in reliability and efficiency. Let's discuss your project in more detail so that we can hit the ground running! Thanks!

@Mahihassi

As a seasoned Firmware Developer with extensive experience in electronics and embedded systems, I am more than equipped to deliver the clean and reliable firmware you need for your wearable device. My proficiency in Nordic nRF52, BLE GATT, and haptic drivers such as DRV2605L aligns seamlessly with your project requirements. Having developed several low-power devices, I understand the nuances of battery management and power optimization that are critical for wearable devices. My dual expertise in both firmware development and PCB design can bring added value to your project. Alongside designing your flex PCB, I can skillfully build the necessary firmware that controls vibration patterns, manages BLE communication, handles battery measurement & charging logic, implements low-power modes and adds LED indicators with basic error handling. Overall, my comprehensive skill set combined with my master's specialization in Embedded Systems makes me uniquely qualified for this project. I'm confident that my dedication and my ability to deliver robust embedded solutions can effectively contribute to taking your wearable device from concept to market-ready success! Let's discuss how I can put my skills into action for you!

@macroenergy

With over a decade of expertise in Electronics and Embedded Systems, including proficiencies with the nRF52 and BLE GATT, I am well-positioned to undertake your Firmware Development project. My experiences in Digital Motor Control and Analog Design align perfectly with your requirements for implementing haptic outputs using the DRV2605L. Additionally, my knowledge of PowerElectronics will ensure effective handling of battery management and low-power modes—essential aspects for a wearable device. I understand the importance of code reliability when it comes to developing firmware for ultra-slim wearables. My extensive work on low-speed applications and torque/speed loop design refined my skills in writing clean, dependable code—an attribute crucial for this project. Moreover, having been involved in projects with similar characteristics such as renewable energy management systems and uninterrupted power supplies, I have a solid grasp on optimizing power usage for increased battery life. Though I'm primarily a firmeware developer, my proficiency in PCB Layouts is an added bonus. If need be, I can undertake flex PCB design responsibilities as well.

@SPARKtechBD

Since 2003 I am working in Digital Electronic. So more than 18 years of experience in Electronics. Arduino NANO/UNO/MEGA, ESP32 and Raspberry PI to build a digital device to read sensor data and send it to the web server, motor control, control relay switches and LEDs. More than 5(five) years of experience in Arduino design and build. If you want an excellent and error-free project delivery, then send a message to me, please. Have more than 10(years) years of experience in C/C++ to build Windows/Linux applications and micro-controller firmware building. If you want a good job delivery, then send a message to me, please. Since 1995 I have been working on Analog and Digital Electronics to build any kind of device. I have build lots of devices. So more than 20 years of experience on Electronics. Including power supply design. Any kinds of schematic and PCB design. Expert PCB design in EasyEDA Pro IDE.

@yilinw010924

Hello — I’d be an excellent fit for your ultra-slim wearable. I specialize in production-grade firmware for nRF52 platforms, with deep experience in BLE GATT, ultra-low-power architectures, and haptic control (DRV2605L/LRA). I’ve delivered multiple wearables where every microamp matters, and I’m comfortable taking full ownership from firmware bring-up to final testing. I can implement your complete feature set: • Custom BLE services (mode, amplitude, timing) • DRV2605L waveform control, PPS/LRA tuning, adaptive intensity • Battery measurement, charging-state logic & protection • Robust sleep modes and event-driven wake cycles • LED/error indicators and safe-state management If helpful, I also handle flex PCB design and schematic refinement, so I can support both the electronics and the firmware as one integrated system. My focus is clean architecture, reproducible builds, and firmware that remains stable even under edge cases. I can work fast, provide structured milestones, and deliver a reliable production-ready stack that aligns with your mechanical and power constraints. Let me know if you’d like to review my proposed workflow or see similar wearable projects I’ve completed.

@AwaisChaudhry

Hi there! I understand you're looking for a Firmware Developer to work on your ultra-slim wearable device that utilizes the nRF52832 chipset and DRV2605L for haptic feedback. My focus will be to create efficient and reliable firmware that seamlessly manages BLE communication, vibration patterns, battery management, and device functionality. Given your existing mechanical design and components, I will ensure that the firmware complies with your requirements while optimizing for low power usage. My goal is to deliver a product that functions flawlessly, complete with LED indicators and error handling to enhance user experience. What specific vibration patterns do you want to implement for the haptics? Thanks!

@timl42

Hi there! As a seasoned Electronics Engineer with a broad skillset specifically in PCB design, circuit design, and firmware development, I'd love to be a part of your wearable device project. My extensive experience includes working with nRF52 and Bluetooth Low Energy (BLE) technologies. I have also created embedded systems that utilize haptic feedback control, similar to what your project is requiring. With my strong command in low-power designs, implementing features such as battery measurement & charging logic and low-power modes is almost second nature to me. In terms of flexibility, not only do I have a good command in firmware development as you need it done on this project but I'm also skilled in flex PCB design which could be an added advantage for you. This blend of dual-experience enables me among the others to have a holistic vision on both ends. Lastly, I'd like to highlight my ability to provide manufacturing services. This means not only can I design your PCBs and write the firmware but I can also manage the entire production process. It will definitely streamline coordination and implementation for smooth project completion. With all these skills combined, I believe I'm perfectly equipped to take on the responsibilities outlined in your project quickly and efficiently. Let's get started!

@hayat38402

Hi, how are you doing? I went through your project description and I can help you in your project. your project requirements perfectly match my expertise. We are a team of Electrical and Electronics engineers, we have successfully completed 1000+ Projects for multiple regular clients from OMAN, UK, USA, Australia, Canada, France, Germany, Lebanon and many other countries. We are providing our services in following areas:  Embedded C Programming.  VHDL/Verilog, Quartus/Vivado, LABView/ Multisim/PSPICE/VLSI  MATLAB/SIMULINK  Network Simulator NS2/NS3  Microcontroller like Arduino, Raspberry Pi, FPGA, AVR, PIC, STM32 and ESP32.  IDEs like Keil MDK V5, ATmel studio and MPLab XC8.  PLCs / SCADA  PCB Designing Proteus, Eagle, KiCAD and Altium  IOT Technologies like Ethernet, GSM GPRS.  HTTP Restful APIs connection for IOT Communications. Also, we have good command over report writing, I can show you many samples of our previous reports. Kindly consider us for your project and text me so that we can further discuss specifically about your project's main goals and requirements.

@mykolalus

⭐⭐⭐⭐⭐ Senior PCB & Embedded Systems & IoT Engineer Here! ⭐⭐⭐⭐⭐ Hello! I will deliver clean, production-ready firmware for your ultra-slim wearable built on the nRF52832 and DRV2605L, with a focus on low power, reliable BLE, and precise haptic control. My work will include BLE GATT services for mode, amplitude and duration control; a robust DRV2605L driver layer (PPS and LRA support, queued patterns, amplitude scaling); battery measurement and charging supervision hooks; aggressive low-power states with wake sources and scheduler-aware haptics; LED/status handling and comprehensive error/health reporting. I’ll write idiomatic, well-commented C using the nRF5 SDK or Zephyr (your preference), provide unit-testable modules, and include a test harness for haptic sequencing and power profiling. Deliverables: firmware repo, build scripts, flashable hex, API docs, integration notes, and a short bring-up checklist. I am ready to start your project immediately and will do my best. Looking forward to discussing more details. Regards, Mykola

@dnx38

Hello, I am a Mechatronics engineer with proven nRF52832 expertise, and i have recently developed BLE firmware using Coded PHY for long-range wearable for athlete performance monitoring. I have also implemented custom GATT services, ultra-low-power modes (<2 µA sleep), battery monitoring, and charging logic in clean Embedded C. I am ready to start developing reliable, production-ready code for your ultra-slim device fast. Please message me for more discussions.

@AlexandrGergel

Greetings, I recently worked on firmware for a slim fitness tracker using nRF52, where I had to design custom BLE GATT services to control alerts and drive an LRA haptic motor through a similar driver while keeping the device under tight power limits. I handled vibration patterns, low-power modes, and battery measurement so the band could still feel “snappy” but last several days on a small cell, and we also used a tiny status LED for mode and error hints. The main challenge in your project will be balancing strong haptic feedback and clean BLE control with very low power and limited board space, especially around the DRV2605L and the battery/charging path. My plan would be to first bring up the nRF52832 with a simple BLE service (mode/amplitude/duration), basic DRV2605L patterns, battery measurement, and LED states; from past wearable work, a first on-device demo with these pieces talking end-to-end is usually ready in about 1–2 weeks once I have the schematic and board in hand. Freelancer Profile: freelancer.com/u/AlexandrGergel Sincerely, Oleksandr

@milosk4

With a mastery of embedded systems and a significant background in PCB design, I believe my skills align perfectly with your project needs. I've completed numerous projects centered around firmware development for wearable devices, and even have experience with the nRF52 series. Moreover, I'm well-versed in Bluetooth Low Energy GATT services, making me an excellent fit to handle the BLE communication aspect of your project. One area of expertise I've garnered over the years is working with haptic drivers. The DRV2605L is no stranger to me, and I understand how to use its features effectively to create unique haptic patterns for your wearable device. Pairing that knowledge with my knack for designing power-efficient systems, I'm confident in delivering clean, reliable firmware that excels in battery management along with implementing low-power modes. In addition to these essential qualifications, I must also emphasize my dedication to delivering high-quality work within the specified deadline. My extensive portfolio, featuring satisfied clients not only from Europe and the US but also from across diverse sections of the globe, underlines my ability to meet and exceed project expectations. This has earned me exceptional feedback from clients and a consistent place among Freelancer's top performers. Let's connect and discuss how we can infuse life into your wearable device masterpiece!

@electronicsdone

Best nRF52832 Wearable Device Development Expert! ⭐⭐⭐⭐⭐ Dear Ulgar, I can help you develop a complete control and BLE-based operating system for your ultra-slim wearable device built around the nRF52832 and the DRV2605L haptic driver. With 30+ years in low-power embedded electronics, BLE device engineering, haptic-motor control, and compact wearable hardware, I’ll focus on a clean, reliable, and highly optimized implementation. ✅ 1. Valuable Suggestion: From experience, using an adaptive BLE advertising and connection-interval strategy dramatically increases battery life while maintaining responsive haptic control—critical for ultra-slim wearables with limited cell capacity. ✅ 2. Similar Projects: 1. Ultra-low-power BLE beacon wearables using nRF52 2. Haptic-feedback smart patch using LRA motors and DRV2605L 3. Battery-optimized wristband with multi-mode BLE control ✅ 3. What You’ll Get: 1. Full BLE service architecture (GATT, control modes) 2. DRV2605L haptic pattern engine & tuning 3. Battery management logic ✅ 4. Quick Questions: 1. Do you prefer fixed BLE operation modes or fully dynamic (app-controlled)? 2. Are you using an LRA or ERM motor for the haptics? 3. Do you already have a preferred battery capacity and charging method? Please note: This platform doesn’t allow me to message first—you’ll need to initiate the conversation. Best regards, PCB Must Innovations

@cesur135

As an experienced Firmware Developer, I have worked on a number of projects similar to your description, engaging with wearable technology and specializing in efficient embedded systems. My familiarity with the nRF52832 chipset and DRV2605L haptic driver align perfectly with the essentials of your project. I’m also well-versed in handling low-power consumption systems, by which I can ensure optimal battery management for better device performance. I have both proven expertise in BLE GATT development and a comprehensive understanding of haptic drivers. Furthermore, my previous experience with industrial automation projects required meticulous work that matches the attention-to-detail required for PCB design, which you mentioned could be a bonus. The versatility, depth and range of my skills also extend to include requirements such as the ability to manage LED indicators, basic error handling and implementing distinct haptic patterns (including LRA motor). Having worked around SCADA system for monitoring and control purposes, I'm confident in ensuring your wearable device operates smoothly and responsively. My goal is to develop clean, reliable firmware for you that will exceed expectations!

@ahmaddar2970

Hello Client, I’ve reviewed your brief for an ultra‑slim wearable based on the nRF52832 and DRV2605L. I bring over six years of hands‑on nRF52 firmware experience and have implemented BLE GATT services, low‑power strategies, battery measurement/charging logic, and haptic control for wearables. My approach: implement BLE services for mode, amplitude and duration control; integrate DRV2605L to drive an LRA with PPS and custom vibration patterns; add ADC battery monitoring and safe charging/state logic; implement aggressive low‑power modes (sleep/SYS OFF) and LED/error indicators; deliver modular, well‑documented Embedded C with unit tests and debug hooks. I can also consult on flex PCB constraints if you want a single engineer for both tasks. I can deliver a firmware baseline for prototype testing in 14 days with two iterative revisions and full documentation. Best regards,

@yaroslavmark

Hello! I will deliver robust firmware for your ultra-slim wearable built around the nRF52832 and DRV2605L, implementing BLE GATT services for mode, amplitude, and duration control, precise haptic sequencing and PPS feedback for LRA motors, battery measurement and charging-state management, low-power sleep/wake strategies tuned for multi-month operation, LED status indicators, comprehensive error handling and diagnostics, and an OTA-capable DFU flow. I will write clean, well-documented C using the Nordic SDK or nRF Connect SDK per your preference, provide unit-tested drivers, modular state machines, and power-profiling results. Deliverables include a source-code repository, build scripts, GATT documentation, test vectors, and a concise bring-up guide for manufacturing. I can also review your flex PCB notes and advise on decoupling and layout for haptic and RF isolation. Please contact me. Best regards, Yaroslav.

@Ravan011patel

Hello, I can deliver high-quality firmware for your nRF52832 + DRV2605L wearable. I don’t work for low prices—I focus on clean, reliable, production-ready results. ✅ Portfolio: https://www.freelancer.com/u/Ravan011patel?sb=t I work with a small expert team (2–3 embedded & full-stack engineers) experienced in IoT, BLE firmware, and low-power MCU systems. ✅ Why I’m a strong fit 1️⃣ Solid experience with nRF52, BLE GATT services, and embedded C 2️⃣ Skilled in sensor & peripheral integration (I2C, haptic drivers, battery logic) 3️⃣ Strong background in low-power wearable firmware and LED/error handling 4️⃣ Able to deliver optimized, modular code that’s easy to scale ✅ What I’ll deliver 1️⃣ BLE services for mode/amplitude/duration control 2️⃣ DRV2605L haptic integration with smooth pattern triggering 3️⃣ Battery measurement + charging logic 4️⃣ Low-power modes + LED indicators 5️⃣ Clean code, documentation, and testing support I can start immediately and ensure your wearable works flawlessly.

@romank94

This is a person you are looking for!!!! With a strong background in Firmware development and expertise in Bluetooth Low Energy (BLE), embedded systems, haptic feedback control, and nRF52832 chipset, I am confident that I am perfectly suited for your ultra-slim wearable device project. My ability to develop clean, reliable firmware that controls vibration patterns, BLE communication, battery management, and overall device behavior aligns seamlessly with the responsibilities you've listed. I have an exceptional track record of working with wearable devices and low-power systems which has further honed my skills and makes me the best fit for this job. Although my specialization lies in firmware development, I also have experience in PCB designing which can be an added advantage for your project. Being able to handle both aspects smoothly can bring notable efficiency and flow of work. Moreover, with a clear understanding of IoT technologies and practical knowledge in bridging cloud connectivity into embedded systems, I'm well-placed to help you build a technologically advanced, highly reliable wearable device. I'm dedicated to delivering high-performance solutions within the projected timeframe without compromising quality. With my education and industry experience, creating sub-50ms inference latency prototypes is not just a claim but something I can actually achieve. Let's combine our passion for embedded devices and create the future together!

@saliktechpro

Hey Ulgar B., I just finished reading the job description and I see you are looking for someone experienced in Debugging, Embedded Systems, PCB Layout, Electronics and Microcontroller. This is something I can do. Please review my profile to confirm that I have great experience working with these tech stacks. While I have few questions: 1. These are all the requirements? If not, Please share more detailed requirements. 2. Do you currently have anything done for the job or it has to be done from scratch? 3. What is the timeline to get this done? Why Choose Me? 1. I have done more than 250 major projects. 2. I have not received a single bad feedback since the last 5-6 years. 3. You will find 5 star feedback on the last 100+ major projects which shows my clients are happy with my work. Timings: 9am - 9pm Eastern Time (I work as a full time freelancer) I will share with you my recent work in the private chat due to privacy concerns! Please start the chat to discuss it further. Regards, Salik.