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I am looking for a specialist to design and develop a compact, lightweight, wearable weighing device that is mounted underneath a shoe. Requirements: - Form factor: footprint similar to a shoe, height ≤ 2 cm - Weight: as light as possible while maintaining sufficient structural integrity - Mounting: attachable underneath a shoe using a strap or comparable fixation system - Integrated display: display unit mounted on the strap (e.g. for weight or status) - Measurement: capture of weight - Electronics: Bluetooth Low Energy (BLE) - Microcontroller: preferably ESP32 - Power supply: battery-operated, energy-efficient - Build: robust, impact-resistant, suitable for everyday use Scope clarification: - Software (firmware and app) will be developed in-house and is not part of this project Expected deliverables: - Concept and design (mechanical and electrical) - Selection of suitable sensor technology (e.g. load cells, pressure sensors) - Circuit design and PCB layout - Integration of the display into the strap - Prototyping support and guidance for scalable manufacturing Goal: A working prototype with a clear path toward reproducible manufacturing.
Project ID: 40400846
13 proposals
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Active 16 days ago
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13 freelancers are bidding on average $2,423 USD for this job

I am a skilled and reliable Embedded Systems Engineer with over 6 years of hands-on experience in Arduino, ESP32/ESP8266, and microcontroller-based development. I specialize in designing efficient, stable, and scalable embedded solutions, turning ideas into fully functional hardware-software systems. I have a strong background in electronics, sensors, communication protocols (UART, I2C, SPI, MQTT, WiFi, BLE), and real-time embedded systems. My development approach focuses on clean, well-structured, and well-documented firmware, ensuring long-term reliability and easy maintenance. I also provide thorough testing, debugging, and performance optimization, including power efficiency improvements where required. I am a detail-oriented engineer with strong problem-solving skills and extensive experience in hardware debugging and firmware optimization. Beyond technical expertise, I value clear communication, meeting deadlines, and maintaining high client satisfaction. I work closely with clients to fully understand project requirements and deliver high-quality results. Pricing is flexible and can be discussed based on project scope and complexity. I am open to both short-term and long-term projects. Let’s work together to build a professional, reliable, and efficient embedded system for your needs.
$2,250 USD in 7 days
7.5
7.5

Hi there, I will design your rugged, sub-2cm ESP32 weighing module and strap-mounted display for seamless shoe integration. --Why me?-- I specialize in ultra-compact ESP32 PCB design and load cell integration for battery-operated wearables. I have the required development hardware on hand to start immediately and guarantee EMI certification-ready architectures. I align with your timezone, respond in under 5 minutes, and provide 2 weeks of free post-project support. You will receive complete manufacturing files, an optimized LCSC BoM, and source files ready for immediate production. --How I will handle your task-- Milestone 1: Sensor selection and mechanical enclosure design Milestone 2: ESP32 PCB layout and strap display integration Milestone 3: Manufacturing file generation and prototyping support --Field-tested deployments-- Smart Gait Analyzer — Designed a low-profile shoe PCB using pressure matrices and ESP32 BLE. Wearable Orthopedic Sensor — Engineered a strap-mounted BLE impact tracker with a sub-2cm rugged enclosure. Regards, Majeed
$2,250 USD in 5 days
6.5
6.5

Your core challenge is achieving accurate weight sensing in a thin, impact-resistant wearable; I will design a compact under-shoe system using optimized load-cell integration and robust mechanical structure. Scope includes full mechanical + electrical concept, sensor selection (low-profile load cells or force sensors), and ESP32-based BLE hardware design. I will ensure ≤2 cm height via distributed sensing layout and rigid-flex or compact PCB integration. Shock isolation, load distribution, and enclosure design will be engineered for real-world walking conditions. Strap-mounted display integration will be designed with flexible interconnect and low-power driver circuitry. Phase 1 (3–4 days): Concept design, sensor evaluation, and system architecture. Phase 2 (4–5 days): Schematic + PCB layout + mechanical enclosure concept. Phase 3 (3–4 days): DFM considerations, BOM finalization, and prototyping guidance. Deliverables: Complete design files, PCB, BOM, mechanical concept, and manufacturing-ready documentation. Total timeline: 10–14 days for a functional, scalable prototype design. Best regards, Engineer Muhammad
$2,250 USD in 7 days
6.8
6.8

I am excited to offer my expertise in developing a portable under-shoe weighing device that is accurate, durable, and user-friendly. With experience in embedded systems, sensor integration, and compact hardware design, I can create a solution that seamlessly fits beneath footwear while delivering reliable weight measurements in real time. My approach focuses on selecting high-precision load cells, optimizing power consumption for portability, and ensuring ergonomic design so the device remains lightweight and unobtrusive during use. In addition to hardware development, I can support firmware programming, wireless data transmission (such as Bluetooth or IoT connectivity), and companion app integration if required. I prioritize thorough testing, calibration, and iterative prototyping to ensure performance consistency across different environments and user conditions. My goal is to deliver a robust, scalable device that meets your functional requirements and is ready for further production or commercialization.
$1,500 USD in 7 days
4.1
4.1

Zurich, Switzerland
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Member since Apr 27, 2026
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