DIY Smart Push-Up Counter

@Mahihassi

As an accomplished Electrical Engineer and IoT specialist, I have amassed a wealth of experience in building embedded systems from scratch, just like the one you envision for your fitness sensor. Not only do I bring a Master's in Embedded Systems to the table, but my area of expertise extends from firmware development to PCB design, electrical designs for signal processing and digital systems among other fields. Specifically related to your project demands, my proficiency with microcontrollers such as Arduino, ESP32 and others aligns perfectly with your preference for Arduino-class boards or tiny ESP32 microcontrollers. In addition, I have worked extensively with ultrasonic sensors like the HC-SR04 ensuring reliable data interpretation and transmission that your project necessitates. Setting me apart is my ability to meticulously integrate all relevant aspects of product development, from circuit board layout and mechanical design to fabrication techniques like 3D printing where relevant. Rest assured that I will provide you with everything required for this project,i.e, a comprehensive bill of materials teeing up easily procurable items in your local tech store along with easily-implementable step-by-step instructions through every phase.

@MuhammadUzair16

Hi I am an embedded systems engineer with over 16 years of experience designing small battery powered sensor products, firmware, BLE communication, and prototype hardware from concept to bench testing. I can guide you through a compact ultrasonic push-up/pull-up counter using an ESP32-class board, HC-SR04 or a smaller low-power ultrasonic alternative, simple charging/power circuitry, and a wall-mountable enclosure that can be built with hand tools or basic 3D printing. My approach would be to keep the first prototype practical: a concise local-parts BOM, clear wiring and assembly steps, starter Arduino/C++ firmware with calibration, distance thresholding, debounce/state logic, live rep counting, and BLE transfer to a phone. I can also provide a minimal Android/demo logging app or script that stores date, time, and session totals, plus power-management tips so the device lasts multiple sessions per charge. A couple of details I would confirm early are your phone platform, whether you want magnetic mounting for metal walls plus adhesive/screws for wood, and what local tech store parts are easiest for you to buy in France. I can also help refine the design later toward a cleaner consumer-grade version with a smaller sensor, enclosure, battery, and charging layout. Please contact me to discuss details.

@leonidye

Hi, I can guide you from parts selection to a working DIY smart push-up counter prototype using an ESP32 or Arduino-class board, an HC-SR04-style ultrasonic sensor, compact battery power, and Bluetooth phone logging. I will prepare a concise local-store BOM, wiring diagram, enclosure/mounting approach, and step-by-step build instructions so the unit can be attached firmly to wood or metal walls without wobble. For the firmware, I will provide clean Arduino IDE/C++ or MicroPython code that initializes the ultrasonic sensor, measures distance changes, applies thresholding/debounce logic, counts reps reliably, and includes a simple calibration routine before each workout. I can also provide BLE code or a lightweight phone/demo script to log date, time, and total reps for each session. Since your acceptance goal is 95% detection during a one-minute push-up test, I will focus on practical filtering, calibration, sensor placement, false-trigger rejection, and repeatable bench-test steps. The final handoff will include the BOM, build guide, commented firmware, BLE/demo logging method, power-management tips, and troubleshooting notes so you can keep improving the prototype later. Regards.

@sahildogra222

Hello there , I’ve carefully checked your requirements and really interested in this job. I’m working as a freelance graphic designer with U.S. and European teams. I’m offering best quality and highest performance at lowest price. I can complete your project on time and your will experience great satisfaction with me. I have rich experienced in Microcontroller, Soldering, PCB Layout, Electronics, Embedded Systems, Product Design, Prototyping and 3D Printing. For more information about me, please refer to my portfolios. I’m ready to discuss your project and start immediately. Looking forward to hearing you back and discussing all details.. A fast response is appreciated

@mahmoudkaseemeg

Hello, Your project is much more than a basic Arduino build. It combines embedded hardware design, real-time signal processing, Bluetooth Low Energy communication, power management, mechanical assembly, and a companion mobile application. Delivering a reliable prototype that consistently achieves the requested accuracy requires careful engineering, testing, and calibration rather than simply connecting off-the-shelf modules. I can develop the complete prototype from the ground up, including selecting compact and cost-effective components, creating the wiring and assembly guide, developing well-structured ESP32 firmware, implementing reliable ultrasonic repetition detection with filtering and state-machine logic, adding a one-button calibration routine, optimizing battery life, and enabling real-time BLE communication with a smartphone. I will also provide a lightweight companion app that records workout sessions with the date, time, and repetition count. Because your target is 95% detection accuracy during continuous exercise, I will include structured testing and tuning to reduce false counts and improve reliability. My rate is $30/hour, reflecting the complete hardware, firmware, BLE integration, testing, and documentation required. I estimate 35–45 hours depending on final refinements. I look forward to building a reliable, scalable prototype that can serve as a strong foundation for future product development.

@hamzazayyad

Hello, I'd be happy to help develop your fitness sensor prototype. I am an Electrical/Electronics Engineer with 15+ years of experience in embedded systems, ESP32/STM32 development, sensor integration, Bluetooth communication, and prototype design. I can guide the project from concept to a working prototype using an ESP32 and an ultrasonic sensor, focusing on a compact, low-power, and easy-to-build design. I'll help select readily available components, optimize power consumption, and ensure reliable rep detection through proper filtering and calibration. You'll receive: • Complete BOM with readily available components • Wiring diagrams and assembly instructions • Well-documented Arduino IDE firmware • BLE communication with a simple smartphone demo for logging reps • Calibration routine for quick setup • Power management and battery charging recommendations • Testing procedures and documentation My approach emphasizes reliable detection, clean code, and a design that's easy to modify as your project evolves. I provide regular progress updates and clear communication throughout development. I look forward to helping bring your idea to life. Best regards, Hamza Embedded Systems | ESP32 | STM32 | Sensor Integration | PCB Design

@tetianam8

⭐⭐⭐⭐⭐ Your project is well thought out, and I'd love to help turn it into a reliable, pocket-sized prototype. I can guide you from component selection through assembly, firmware development, BLE communication, and testing to ensure you have a working system that's easy to build and improve. I'll design the prototype around an ESP32 and ultrasonic sensor, focusing on accurate rep detection using filtering, debounce logic, and a simple one-button calibration routine. You'll receive a compact BOM with readily available parts, detailed assembly instructions, well-commented Arduino code, BLE communication to a smartphone, and a lightweight demo app that logs workout sessions with date, time, and total reps. Milestones: Hardware selection & BOM Circuit design & build guide Firmware & calibration routine BLE app & session logging Testing and optimization for >95% detection A couple of questions: • Do you prefer the HC-SR04, or are you open to a smaller waterproof ultrasonic sensor for a more compact design? • Is Android only acceptable for the first prototype, or do you need iOS support as well? I'm confident we can build a reliable prototype that's easy to manufacture and expand in future revisions.

@abdurRafiqM

HI, I am an experienced electronics and PCB Design engineer, specialised in use of ECAD software such as Altium Designer, KICAD, EasyEDA, etc. for the the design of electronics and PCB. I will design your projects to meet your Requirements and the industry standard. I do all kinds of circuits such as Power delivery circuit, Sensor Integrated Circuits, wireless control, MCUs etc. I will deliver the following. The Schematics for your Design The PCB for the design Bill of materials(If needed) Gerber, Pick and Place and other manufacturing and assembly drawings needed. Full Support and consultancy till the project is done. Kindly send me message for my previous designs and also so we can discuss further on your project I look Forward to working with you. Best Regards, Abdur-Rafiq

@yaroslavmark

Hi, I have 12+ years of experience in embedded hardware and IoT product development, having delivered 40+ production-grade PCB and sensor-based systems with BLE, power optimization, and real-time signal processing for consumer and automotive applications. I will design a compact ESP32-based ultrasonic rep counter with robust signal conditioning, stable mechanical mounting, and BLE telemetry optimized for mobile data logging. ✅ I will define system architecture using ESP32 + ultrasonic sensing, design power-efficient sampling logic, and ensure stable distance measurement with filtering and hysteresis-based rep detection. ✅ I will select low-cost, locally available components, design battery-powered circuitry with proper regulation, and ensure mechanically rigid wall-mount integration for consistent readings. ✅ I will implement firmware with calibrated baseline capture, state-machine rep counting, and BLE GATT notifications for real-time smartphone synchronization. I want to confirm whether ultrasonic-only sensing is preferred over ToF (VL53L0X) for higher stability in reflective environments. I want to clarify if you prefer a simple BLE data stream via nRF Connect-style app or a custom mobile app with session history storage and analytics. Best, Yaroslav

@TingWang250617

Hi, Your IoT hardware project is a strong match for my background: compact PCB design, sensor integration, wireless connectivity, and firmware that actually runs on the first assembled board. Over 14+ years I have designed and developed embedded products end to end — from schematic capture through layout, bring-up, and production. Recent examples include KiOSK-IQ v1.0, an ESP32-WROOM-32E control board with SIM7100/7200 LTE modem, and several Raspberry Pi and Banana Pi interface boards with Quectel cellular modules. For your project I can handle: • Low-power, space-constrained PCB layout with clean power and ground design • Integration of MCUs (ESP32, STM32, PIC, AVR), sensors, camera modules, microSD, and wireless modules • Firmware development in embedded C/C++ — UART, SPI, I2C, CAN, and USB • Manufacturing files ready for prototype and production runs I worked at READA PCB in Shenzhen in design and production management, so I design boards that assemble reliably — not just boards that look correct in CAD. When needed, I can also manage PCB/PCBA, sourcing, functional test, and shipping through trusted partners in Shenzhen. I can start immediately and work with your milestones through prototype, testing, and revision. Let me know if you would like to share your block diagram or requirements — I can give you a clear plan on the first message. Best regards, Ting

@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.

@AlexK851

Hi, I’d be interested in helping with this. I’ve worked with small embedded/electronics prototypes and this sounds like a good fit: compact ESP32/Arduino-class hardware, ultrasonic sensing, simple firmware, and phone logging. I can guide the build from parts selection through wiring, firmware, calibration, BLE/app demo, and testing. I’d probably base it around a small ESP32 board with an ultrasonic distance sensor, rechargeable battery setup, and a simple enclosure/mounting approach that can be tested quickly before refining the hardware. I’d also focus on making the first prototype practical: clear BOM, step-by-step assembly, commented starter code, and a calibration routine so the rep detection can be tuned during real push-up/pull-up tests. Best regards, Alex

@julianm260

As a seasoned Electronics Engineer with over 8 years of experience, I believe my skill set aligns perfectly with what you require for your smart push-up counter. My expertise in RF engineering, embedded systems, and power electronics will empower me to guide you from the initial stages all the way through to the final working prototype. I have a solid track record designing, testing and delivering robust hardware solutions, leaving no room for errors. My skills in circuit design and PCB layout will allow me to meticulously select readily available parts from your local tech store to meet your specifications including the ultrasonic HC-SR04 sensor you’ve mentioned. This will ensure we keep the compact nature of the device that can be easily mounted on any wall (wood or metal) as desired. Efficient assembly using hand tools and power management that enables extended battery life are two of my greatest strengths—critical for your demands. Moreover, my competency in firmware development (especially in C/C++), power electronics and system integration provides me with unique capabilities to develop clean, robust code to initialize and increment the rep counter using the ultrasonic sensor as well as capturing useful data points like date, time, and total reps for storage and processing on the app - ultimately providing you with a clean starting point to iterate and refine. My commitment would always be to ensure compliance with safety, reliability, and performance standards to yield an end product that is efficient and accurate-utilizing over 95% of recorded reps during testing.

@mahmoudralizadeh

Hello, I can design and develop a compact attachable sensor system that detects and counts push-ups or pull-ups and sends the data to a mobile app via BLE. My solution would include: IMU-based motion detection with filtering for stable rep counting Embedded firmware (low-power MCU such as ESP32) BLE data transmission to a simple mobile interface Calibration to reduce false positives across different mounting surfaces Full source code and design documentation Deliverable will be a complete design package (hardware + firmware + setup guide). No physical shipping required. I can start immediately and iterate quickly based on test feedback to ensure reliable counting accuracy. Best regards

@electronicsdone

Hi, The biggest risk in this project is not counting repetitions—it is achieving reliable and consistent rep detection under different exercise conditions while keeping the device compact, battery-efficient, and easy to assemble and calibrate. I have 30 years of experience in embedded systems, sensor integration, ESP32 development, Bluetooth Low Energy (BLE), and rapid prototyping of IoT devices. I have worked on battery-powered systems involving real-time sensing, wireless communication, and mobile connectivity. For this project, I would focus on: 1. Designing a compact hardware architecture around an ESP32 and ultrasonic sensor for reliable push-up and pull-up detection. 2. Developing robust detection algorithms with filtering and debouncing to achieve high counting accuracy. 3. Implementing BLE communication to transmit workout data directly to a smartphone. The goal is to build a compact and reliable fitness sensor that accurately counts repetitions, stores workout data, and provides a solid foundation for future product development. A couple of questions: 1. Do you prefer the device to use only an ultrasonic sensor, or are you open to combining it with an accelerometer for improved accuracy? 2. What is the preferred battery size and expected operating time per charge? If you message me, I can outline the most practical hardware architecture and prototype strategy for your smart fitness sensor. Best regards, Prat PCB Must Innovations

@Tahir789

I am a Licensed Professional Electrical Engineer with 6+ years of experience in circuit design, embedded systems, and sensor-based hardware projects. I have hands-on experience with ESP32-based microcontroller design, ultrasonic sensor integration, BLE communication, and battery-powered device design ,directly applicable to this rep-counter project. My approach would start with a locally-sourceable BOM (ESP32, HC-SR04, LiPo battery + charging circuit, magnetic or adhesive mounting hardware), followed by well-commented Arduino/C++ firmware handling sensor calibration, rep debouncing logic, and BLE notify characteristics for live rep-count streaming to a ph one. I'd pair this with a minimal demo logging app and a simple press-and-go calibration routine so the device works the moment it's mounted. I can iterate closely with you on threshold tuning and mounting stability to meet your 95% detection accuracy target, and I'll document the build clearly so you can refine the hardware further on your own. I am available immediately to start and discuss. Best regards, Tahir Saleem

@trm66614

I am excited to assist you in building the ultimate DIY Smart Push-Up Counter! Let’s break down your project to create a pocket-sized fitness sensor that effectively counts push-ups and pull-ups. I will provide a concise bill of materials, including the necessary microcontroller and an ultrasonic sensor like the HC-SR04. I'll ensure all parts are local and affordable. Step-by-step build instructions will be included, detailing how to mount the unit securely against any wall type without wobbling. I aim to make assembly easy, leveraging basic hand tools. My starter firmware will be well-commented and straightforward, initializing the ultrasonic sensor and counting reps efficiently. Plus, I will include code snippets for sending data to a smartphone! I’m committed to ensuring your working prototype will reliably detect at least 95% of reps during a test. Do you have preferred methods for data transmission to the phone? What is your target weight for the final design? How long do you need the battery to last on a single charge? Let's get started and make this project a success!

@haseebsidd07

Hi there, I’m excited about your project of creating a pocket-sized fitness sensor. The use of ultrasonic sensors for counting push-ups and pull-ups is innovative and I can definitely help you achieve a reliable working prototype. My name is Abdul Haseeb Siddiqui, and I have over 6 years of experience in Electronics, Microcontroller programming, PCB Layout, Product Design, 3D Printing, Embedded Systems, and Prototyping. I specialize in guiding clients from concept to functional devices. I will provide: - A concise bill of materials suitable for local procurement - Step-by-step build instructions and assembly techniques - Well-commented starter firmware for your selected microcontroller - Code snippets for smartphone connectivity - A quick calibration routine to ensure seamless user experience I'm confident that I can guide you through each stage of this project to meet your acceptance criteria. Looking forward to collaborating with you! Thanks, Abdul Haseeb Siddiqui [My Portfolio](https://www.freelancer.com/u/haseebsidd07)

@joshuajsaunders

You've likely been through enough vague proposals to know the difference between someone who's read your brief and someone who's recycled a template. Understanding the importance of reliable rep detection in your DIY Smart Push-Up Counter, I foresee a potential challenge in ensuring accurate distance measurement for precise counting. To tackle this challenge, I will carefully select and calibrate the ultrasonic sensor, implement intelligent debounce algorithms in the firmware, and provide detailed instructions for optimum sensor positioning to enhance accuracy. With my extensive experience in IoT prototyping and sensor integration, I can guide you through this project seamlessly. Not moving forward with this innovative fitness solution could mean missing out on a valuable opportunity to enhance your workout experience. Feel free to explore my profile for evidence of my expertise. Could you share your preferred tech stack for the companion app development? Regards, Joshua Jaime Saunders