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We have a working prototype using the Nordic nRF52832 and SoftDevice S132. We now require production-ready firmware with the following features: // Core Requirements: 1. Geofence Control: Device remains disabled when inside a geofence (center and radius provided via BLE). Continuously compare the live RSSI against the geofence threshold, with minimal latency and low power usage. 2. Alerts: If the device moves outside the defined fence, immediately activate the LED, buzzer, and/or vibration. Stop alerts automatically once the device returns within the fence. 3. Peer Notifications: Instantly send a short BLE advertising packet when a fence is breached, allowing nearby, pre-paired devices to react. Fast and reliable BLE advertising is the highest priority. 4. Low Power Operation: Maintain power efficiency similar to BLE beacons. // Application Layer: 5. Build the application on top of SoftDevice S132, or another suitable alternative if justified. 6. Provide well-commented source code, linker scripts, and a clear README explaining compile-time options, testing procedures for fence updates, breach events, and alert behavior. 7. Create validation tests: setting the geofence via BLE, simulating entry/exit, and verifying alert and BLE advertisement functioning. // Assumptions: 8. Moderate to high 2.4GHz congestion is expected. 9. Each device has an alert mechanism (LED, buzzer, and/or vibration). 10. No phone application is within scope. 11. No custom PCB is within scope. // Request for Developer Proposal: Please provide your proposed milestone plan and target deliverables from a developer perspective, including: 12. Key development phases or milestones 13. Estimated cost or time for each phase 14. Summary of deliverables at each stage
Project ID: 40401815
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As an experienced Embedded Systems Engineer, I bring exceptional skills and in-depth knowledge of a variety of microcontrollers such as Nordic, TI, STM, AVR, Cypress and more. These skills align perfectly with your project requirements empowering me to develop production-ready firmware for the nRF52832 that incorporates geofencing control, immediate alerts using LED, buzzer or vibration on fence breach and reliable Peer Notifications via BLE advertising. I have also hands-on experience with SoftDevice S132 which can prove vital throughout the application layer development.I've been lauded by clients for creating clean and well-commented code. My work will be no different – you'll get robust source code, linker scripts as well as a detailed README explaining compile-time options and all necessary testing procedures.
$250 USD in 7 days
6.5
6.5
29 freelancers are bidding on average $529 USD for this job

Hi there, I’m Shamshad, and I can turn your nRF52832 geofence idea into production-ready firmware with a tight, low-power design and robust BLE behavior. I’ll architect a geofence engine that uses BLE-provisioned center/radius, continuously monitors RSSI with minimal wakeups, and keeps the device disabled when inside the fence. Alerts will trigger instantly on exit using LED, buzzer, or vibration, and will auto-stop when breach ends. I’ll push a fast, reliable BLE advertising path to notify nearby pre-paired devices as soon as the fence is breached, while keeping the device in low-power mode between events. The application layer will be built on SoftDevice S132 for predictable timing and safety, with clean, well-commented code, linker scripts, and a README outlining compile-time options, testing procedures for fence updates, breach events, and alert behavior. I’ll include validation tests for BLE-based geofence updates, entry/exit scenarios, and alert/advertisement verification. The plan covers six milestones, with clear deliverables and risk checks, and uses Git for version control and thorough documentation for QA and future maintenance. What is the expected maximum geofence update latency and the target advertising interval for breach notifications (in ms) to balance power and responsiveness? Best regards,
$750 USD in 24 days
6.6
6.6

Your system already has a working nRF52832 prototype, but it lacks production-grade reliability, optimized geofence handling, and low-latency BLE event execution, which can cause unstable behavior in real environments. I will convert your prototype into a fully production-ready firmware with stable geofencing, instant breach detection, and optimized BLE advertising under congested 2.4 GHz conditions. My approach ensures accurate RSSI-based filtering with low power consumption, fast event triggering, and robust state management without glitches or delays. I have 12 years of experience in embedded firmware development and PCB-level system integration, especially on Nordic and BLE-based platforms. I have successfully delivered similar systems involving BLE beacons, geofencing logic, and real-time alert mechanisms in production environments. These projects required strict power optimization, fast advertising response, and reliable multi-device communication under interference-heavy conditions. I will ensure clean, well-documented code, scalable architecture, and complete testing setup for geofence entry/exit and alert validation. Your requirement for high reliability and fast response in a noisy RF environment is exactly aligned with my past experience. I am confident to deliver a production-stable firmware that performs beyond prototype limitations. Regards, Engineer Muhammad Usman, PCB & Firmware Developer
$500 USD in 7 days
6.7
6.7

Hello, I understand you need production-ready firmware for the nRF52832 with SoftDevice S132, delivering geofence control, low-latency alerts, peer BLE advertising, and strong power efficiency. I will build a clean, well-commented codebase with a secure geofence engine, RSSI-based position checks, and responsive alert handling that stays active within the fence and immediately signals on breach. The design will favor fast and reliable BLE advertising for nearby devices, and I will ensure power use stays comparable to beacon-level efficiency. The app layer will run on SoftDevice S132 (or an equally justified alternative), with clear linker scripts and a comprehensive README detailing compile-time options, testing steps, and validation plans. I will provide robust validation tests for setting fences via BLE, simulating entry/exit, and verifying alerts and advertisements. I will deliver an actionable milestone plan with deliverables at each stage, and keep all work under version control with thorough documentation. What is the preferred motherboard or board variant for silk screening, and is the current hardware revision required for the geofence accuracy target in 2.4GHz environments? How many unique geofence configurations should the device support simultaneously, and is dynamic reconfiguration via BLE required during operation? What latency target do you expect for RSSI comparisons and breach alerts (ms range)? Are there any specific regulatory or certification constrain
$750 USD in 12 days
6.5
6.5

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: Antenna Design (CST, HFSS) 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.
$500 USD in 7 days
5.9
5.9

Hi, I’m an embedded firmware engineer with 10+ years of experience in low-power BLE systems and Nordic nRF52 devices. I’ve delivered 40+ products using nRF52832/S132, achieving <10 µA sleep current and fast, reliable BLE performance in noisy RF environments. Approach ✅ I will build firmware on S132 with an event-driven design for fast response and low power. ✅ I will implement stable geofence detection using filtered RSSI with hysteresis. ✅ I will optimize power using RTC-based scheduling and low-duty scanning. ✅ I will implement alert handling and fast BLE advertising, then validate performance. Questions ✅ I need to confirm the RSSI source and how the geofence threshold is defined. ✅ I need to know target battery life to tune power consumption. ✅ I need clarification on advertising interval and payload limits. ✅ I need confirmation on alert behavior (all outputs or priority). Milestones & Deliverables ✅ Phase 1 (3 days, $150): architecture and BLE setup. ✅ Phase 2 (5 days, $250): geofence + alerts working firmware. ✅ Phase 3 (3 days, $150): optimization and testing. ✅ Phase 4 (2 days, $100): documentation and final delivery. Best, Yaroslav
$650 USD in 7 days
5.3
5.3

As the head of a team specializing in flexibly bringing artificial intelligence systems together with hardware, I believe we are uniquely suited to delivering the functionality and reliability you need for the nRF52832 Geofencing Firmware development project. Not only do we have experience with Nordic platforms and SoftDevice S132, but our comprehensive grasp of the complete technology stack involved in IoT projects would ensure perfect harmony among all components. Considering that 2.4GHz congestion is a concern, we can put our MQTT-connected sensor networks proficiency to efficient use ensuring seamless wireless data transmission. Our expertise in implementing Odoo ERP end-to-end and Django on AWS, GCP, and Azure can be highly valuable for this project as it necessitates a clear README explaining compile-time options, testing procedures, and alert behavior understanding. Our reputation for thorough documentation is paralleled only by our dedication to quality assurance; thus, you won’t just receive functional code but also validation tests tailored for your specific needs.
$500 USD in 7 days
4.3
4.3

⭐⭐⭐⭐⭐ I’ve reviewed your nRF52832 + S132 prototype. This is a low-power BLE state machine system, and the key is reliable RSSI filtering + fast BLE event response under congestion. I propose a structured firmware upgrade built on SoftDevice S132: 1. Geofence engine • RSSI-based IN/OUT detection using filtered RSSI (EMA moving average) • Hysteresis + time threshold to prevent boundary jitter • Continuous low-power BLE scan windows 2. BLE configuration layer • GATT service to set center + radius • Flash storage for persistent geofence params • Validation for safe updates without reset 3. Alert system • Immediate GPIO trigger (LED/buzzer/vibration) on breach • Auto-clear when back inside fence • Debounced state transitions for stability 4. Peer notifications • High-priority BLE advertising on breach event • Minimal payload for fast broadcast • Optimized interval for crowded 2.4GHz environments 5. Low power optimization • Duty-cycled scanning (beacon-like behavior) • Sleep modes between scan windows • Target BLE beacon-level current consumption Milestones: Geofence + RSSI filter core BLE config service + persistence Alert + state machine integration Advertising + peer reaction system Power tuning + full validation tests Deliverables: • Well-commented firmware (C, S132) • BLE GATT definitions • Build + linker config • Test procedures (set fence, simulate entry/exit, verify alerts & ads)
$500 USD in 7 days
4.5
4.5

Hello, I have solid experience delivering production firmware on nRF52 platforms, including latency critical BLE advertising and ultra low power designs. For your system, I will focus on deterministic RSSI based boundary detection and immediate advertising response under congested RF conditions. I have handled similar challenges where timing and power budget were tightly constrained. Proposed milestones: - Architecture and RF strategy Define RSSI filtering, geofence logic, and advertising scheme Time: 2 days - Core firmware implementation Geofence engine, alert control, optimized BLE advertising Time: 5 days - Power optimization and stress validation Beacon level current tuning and congestion testing Time: 3 days - Test suite and documentation BLE configuration flows, validation scripts, full README Time: 2 days Deliverables include clean source code, build configs, test procedures, and tuning parameters for real environments. I prioritize reliability and fast response over generic implementations. I can start immediately and deliver a robust system ready for production.
$400 USD in 8 days
2.8
2.8

Experienced embedded developer ready to deliver production‑ready firmware on your nRF52832 hardware. I have extensive experience developing firmware for embedded devices and BLE applications. While I haven’t worked specifically with the nRF52832 before, I’m confident in adapting quickly thanks to my background with similar microcontrollers and BLE stacks. To ensure smooth development and accurate testing, I’ll need you to provide the device hardware. Here’s my proposed plan: Phase 1 – Setup & Architecture • Receive device hardware, review requirements, and finalize development environment. (1 week) Phase 2 – Core Development • Implement geofence control, alert mechanisms (LED, buzzer, vibration), and peer notifications via BLE advertising. (1-2 weeks) Phase 3 – Application Layer & Documentation • Build on SoftDevice S132 (or justified alternative), deliver source code, linker scripts, and README with compile/test instructions. (1 week) Phase 4 – Validation & Testing • Run geofence update tests via BLE, simulate entry/exit, verify alerts and BLE advertisements. Provide validation test suite. (1 week) Deliverables Working firmware with geofence, alerts, BLE notifications Complete source code + documentation Validation tests + final firmware package With the hardware in hand, I can ensure reliable geofence control, instant peer notifications, and low‑power operation, all production‑ready.
$750 USD in 30 days
2.9
2.9

Hey there! I’m beyond excited to take this on! I recently wrapped up a similar project with good results. Drawing from my experience in Electronics, Testing / QA, Embedded Software, RTOS, Bluetooth Low Energy (BLE), Firmware, Version Control Git, Signal Processing, Software Documentation, Geofencing, I’m ready to dive into your project. Please come over chat and discuss your requirement in a detailed way. Regards Vishal Maharaj
$500 USD in 5 days
1.7
1.7

⭐⭐⭐⭐⭐ ✅Hi there, hope you are doing well! I have developed firmware for Nordic nRF52 series devices integrating BLE and geofencing features, enabling reliable location-based triggers with low power consumption. Based on my experience, the most crucial part of this project is ensuring fast and power-efficient RSSI processing combined with BLE advertising to meet real-time geofence breach notifications. ⭕Approach: - Analyze and optimize RSSI sampling to minimize latency and power usage - Implement geofence control logic using SoftDevice S132 or an optimized BLE stack - Develop alert mechanisms controlling LED, buzzer, and vibration per geofence state - Design peer notifications with high-priority BLE advertising and packet reliability - Provide thorough source code documentation, linker scripts, and testing frameworks - Perform validation tests simulating fence setting, entry/exit, and alert triggers ❓Could you please clarify the expected maximum radius and frequency of fence updates? I am confident in delivering a robust, production-ready firmware package with complete documentation and validation tests that meet your geofencing and BLE requirements efficiently. Thank you for considering my proposal. Best regards, Nam
$550 USD in 5 days
0.0
0.0

Hey , I just finished reading the job description and I see you are looking for someone experienced in Bluetooth Low Energy (BLE), Geofencing, Software Documentation, Electronics, Firmware, Embedded Software, RTOS, Version Control Git, Testing / QA and Signal Processing. 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, Adil.
$250 USD in 3 days
0.0
0.0

This is exactly the kind of work I love doing, and I'm currently offering premium quality at a reduced rate while building my reputation — meaning you get full dedication without the full price tag. I understand you're looking to develop production-ready firmware for the nRF52832 with geofencing capabilities, alert mechanisms, and low power operation under moderate 2.4GHz congestion. You're seeking a solution that prioritizes speed and reliability in BLE advertising when breaching defined geofences. This matters for bringing robust, alert-enabled devices to market seamlessly. I have extensive experience in testing/QC, version control (Git), and embedded software engineering. My skills align perfectly with your need for a production-compatible firmware with efficient energy consumption and robust debugging mechanisms integrated. I'm enthusiastic about the possibility of collaboration. Regards, Jason McLachlan
$563 USD in 3 days
0.0
0.0

I am writing to propose my services for the development of Geofencing firmware using the nRF52832 Bluetooth Low Energy (BLE) platform. With extensive experience in embedded systems and Bluetooth development, I can design and implement a custom geofencing solution that leverages the nRF52832’s low power consumption and Bluetooth capabilities. The firmware will allow for precise geofencing functionality, enabling your devices to trigger events based on their entry or exit from predefined geographic areas. This can be utilized for a variety of applications, such as location-based notifications, asset tracking, or security systems. The development process will include the design of geofencing logic, the integration of GPS or Bluetooth-based location services, and the optimization of the firmware for power efficiency. I will also ensure that the firmware supports seamless communication with other devices or cloud-based systems, allowing for real-time updates and accurate location tracking. Throughout the project, I will collaborate closely with your team to tailor the solution to your specific use case, ensuring smooth integration and long-term reliability. I look forward to discussing how I can help bring this geofencing solution to life using the nRF52832 platform.
$250 USD in 7 days
0.0
0.0

Hi, I have strong experience with Nordic nRF52 firmware and can deliver production-ready code for your nRF52832 using SoftDevice S132 with efficient geofence logic, fast BLE advertising, and low-power operation. I propose a milestone-based approach: (1) architecture setup and BLE service design, (2) geofence + alert implementation, (3) high-priority breach advertising optimization, and (4) power tuning, testing, and documentation. Deliverables will include fully commented source code, linker/build files, test procedures, validation scripts, and a clear README covering configuration, testing, and deployment. I will ensure reliable performance in congested 2.4GHz environments and provide a robust, production-ready firmware package. Best regards, Justin
$700 USD in 4 days
0.0
0.0

Hello I am excited to submit my proposal to develop production-ready firmware for your prototype using the Nordic nRF52832 and SoftDevice S132. Having reviewed your project specifications thoroughly, I am confident in my ability to deliver a robust and efficient solution that meets all your core requirements while adhering to the necessary constraints for low power operation and reliable BLE performance. I am excited to collaborate with you on this project and would be happy to discuss any specific details or adjustments you may have in mind. Please feel free to reach out if you have any questions or would like to discuss the project further. Thank you for your consideration, and I look forward to the opportunity to work together. Sincerely,
$400 USD in 3 days
0.0
0.0

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