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I need a compact acquisition board that reads pressure sensors and sends data by Bluetooth and Celullar (SIM). Your job covers both the hardware and the embedded layer that will live on the board. System Requirements : A custom PCB (embedded system) must be designed to interface with the sensor. The system will be powered by an external battery, for which voltage and current requirements must be carefully calculated. The PCB will receive pressure data from the sensor through front-end components directly connected to the electrode outputs. A microcontroller (MCU) will scan the matrix at high frequency by sequentially energizing one electrode (e.g., rows) and measuring responses across perpendicular electrodes (e.g., columns). This scanning process allows detection of pressure points across the grid. A target scanning frequency of up to 20 MHz is considered. The velostat supplier provides a datasheet defining the relationship between applied pressure and measured voltage. Connectivity and Data Transmission : The system must support both Bluetooth and SIM-based communication: • Bluetooth will be used for initial setup and when a nearby device is available. • SIM communication will be used as a fallback when Bluetooth is unavailable, though it consumes significantly more power. To optimize energy usage, data may be buffered locally and transmitted in batches via SIM instead of continuously. The device should automatically power on when actual usage is detected. It must distinguish between meaningful pressure (e.g., user interaction) and irrelevant pressure (e.g., when stored in a bag). During first use, the user connects via Bluetooth through a mobile app, which links the device to their account. Afterward: • If Bluetooth is available, data is transmitted via Bluetooth. • If not, data is transmitted via SIM. The system must also ensure proper ownership handling. For example, if the device is resold, data must no longer be sent to the previous user. Additional Obligatory Features : • Integration of RF components to ensure reliable communication with nearby modules. • Support for additional sensors (e.g., traction or weight sensors), including assistance in their development and integration. • Geolocation capability accessible through the mobile application. • Automatic detection of the number of electrods/outputs is needed. The acquisition should board should be able to get up 30x30 or 40x40 sensor’s outputs, then adapt automatically the information to be send so the device show the right matrix of pressure. • Remote device management via an admin platform, including: • Firmware updates (OTA) • Remote activation/deactivation (e.g., in case of theft) Software and Hardware Constraints : The embedded software must be robust and support remote updates and configuration changes. Component options such as the ESP32 may be considered, subject to validation of performance and durability. The PCB (excluding the battery) must not exceed dimensions of 8 × 5 cm (outside the battery).
Project ID: 40430500
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45 freelancers are bidding on average €4,330 EUR for this job

Designing a pressure sensor PCB requires an amalgamation of skills -- from circuit design to embedded systems. Fortunately, that's precisely where my expertise lies. I am confident that I have the technical aptitude and experience needed to create a compact acquisition board that reads pressure sensors and provides data transmission via both Bluetooth and SIM-based channels as described in your project. Over the years, I have developed a deep-rooted understanding of low-power embedded systems, wireless communication protocols, and sensor-driven applications - all of which are essential for this project. My proficiency in using various communication interfaces such as LoRa, BLE, Wi-Fi, and 5G system can be beneficial in implementing seamless connectivity between your device and the user's mobile app. Moreover, I can help maximize energy efficiency by buffering data locally and transmitting them in batches through SIM rather than continuously. In addition to these core responsibilities, my understanding of location-based services can add significant value by enabling geolocation capabilities accessible through the mobile application. Given my track record of delivering robust interconnected products ready for real-world deployment efficiently and adeptly, I am confident that I can bring tangible results to your team.
€3,000 EUR in 2 days
7.9
7.9

With my expansive background in Digital Motor Control, Analog Design, Electronic Design, and more specifically, PCB design and Embedded system, I am well-positioned to tackle your Pressure Sensor PCB design project. I am highly proficient in using Altium for schematic and PCB design, and CAD files of manufacturers gathering; skills that align with the requirement for a custom PCB design tailored to the pressure sensor. I have also worked on RF transmitter and receiver projects as well as Bluetooth applications which will be valuable in implementing your required connectivity features. Moreover, my understanding of Microcontrollers like ESP32 and proficiency with Bluetooth and Wifi goes hand-in-hand with the need for an embedded layer that will fuel the acoustic board you require. My familiarity with Arduino, MSP430, Atmel, DSP (Texas Instruments), Renesas, STM32,C2000 only strengthens my capabilities when it comes to microcontroller application development. Lastly, my experience in Power Electronics - AC/DC converter, DC-DC converter, Battery charger, Solar inverter,Renewable Energy applications among others is directly relevant to the need for voltage and current calculations as this board will be powered by an external battery. Choosing me offers you more than just skillset but proven expertise garnered from numerous experiences that will ultimately result in a top-notch solution
€4,000 EUR in 40 days
7.4
7.4

Dear Sir, I can develop the complete embedded hardware and firmware solution for your pressure-matrix acquisition system. I have experience with high-speed sensor acquisition, ESP32-based systems, BLE/LTE communication, and low-power embedded design. The PCB will be optimized to fit within your 8×5 cm constraint while maintaining RF stability and signal integrity. I can design the electrode scanning architecture for large pressure matrices (30×30 / 40×40) with automatic matrix detection. Special attention will be given to analog front-end design, multiplexing strategy, noise reduction, and high-speed acquisition performance. The firmware will support Bluetooth provisioning, SIM fallback communication, OTA updates, remote management, and secure ownership transfer. Power management will be optimized to reduce SIM energy consumption through intelligent batching and sleep-state control. I can also integrate GPS/geolocation, additional sensors, and anti-theft remote deactivation features. Deliverables include schematic, PCB, firmware, manufacturing files, and system architecture documentation. Ready to discuss acquisition architecture, sensor characteristics, and communication strategy in detail.
€4,000 EUR in 7 days
6.8
6.8

With nearly three decades in the electronics industry across various domains, I'm convinced I possess all the requisite skills and knowledge to execute your Pressure Sensor PCB Design project seamlessly. My expertise in RF & Telecom, Embedded Systems, Industrial processes, and Advanced Tech that includes Bluetooth, BLE, Microcontroller, and PCB Layout align impeccably with the scope of this undertaking. As a seasoned engineer, I've developed many high-reliability systems involving complex hardware physics and robust embedded software for distinguished industries like Defense and Medical. This has fortified my problem-solving abilities, making me an ideal candidate to handle intricate connections between multiple sensors with different permutations and combinations. In addition to addressing all your specified requirements thoroughly and efficiently, I bring added value to the table. My broad range of experience and exposure to diverse technologies equip me with the ability to identify hidden risks early-on during the development phase and devise reliable contingency plans. With me on board, you can rest assured that you'll receive nothing short of exceptional quality, performance-driven deliverables completed on time and within budget.
€4,000 EUR in 7 days
7.0
7.0

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.
€5,000 EUR in 30 days
6.7
6.7

Hi there, J’ai bien lu votre projet, et je peux vous accompagner dans la conception d’une carte compacte d’acquisition de pression avec Bluetooth, communication cellulaire (SIM), gestion d’énergie optimisée, OTA et gestion distante des appareils. Je suis Samuel Tshibangu, ingénieur en mécatronique avec une solide expérience en conception de PCB, systèmes embarqués, acquisition de capteurs, communication sans fil et dispositifs alimentés sur batterie. J’ai déjà travaillé sur des architectures similaires (matrices de capteurs, front-end analogique, ESP32/MCU, Bluetooth + SIM, stockage local, IoT), ce qui me permet de proposer une solution fiable et adaptée à vos contraintes (notamment 8 × 5 cm). Je peux couvrir l’ensemble du projet : schéma, PCB, BOM, calcul de consommation, front-end capteur, communication Bluetooth/SIM, logique d’ownership, géolocalisation, OTA et firmware évolutif avec détection automatique de matrices (jusqu’à 30×30 / 40×40). N’hésitez pas à m’envoyer un message. Cordialement, Samuel Tshibangu
€4,000 EUR in 1 day
6.3
6.3

Hi Motia E., Last week I built a very similar pressure‑matrix board with BLE + cellular fallback, so I’m confident to handle this really well. My Questions. 1) Which cellular standard and region do you need (LTE‑M/NB‑IoT vs 2G), and SIM type (nano SIM or eSIM)? 2) Is “20 MHz” the row‑drive clock or the ADC sampling rate? What frame rate and resolution (bits/SNR) do you actually need for 30×30 or 40×40? My Suggestions. 1) Use a low‑power BLE MCU (ESP32‑S3 or nRF52) plus an LTE‑M/NB‑IoT module with GNSS (e.g., BG95), FRAM for safe buffering, and hard power‑gating of cellular to save battery. 2) For fast, clean scanning, use low‑leakage analog switches + TIAs and DMA; if 20 MHz is real, add a tiny FPGA to offload timing. Auto‑detect rows/cols at boot. My Execution Plan. 1) I confirm specs: matrix size, real scan/frame targets, battery limits, regions, ownership rules. 2) I define architecture: BLE MCU, LTE‑M/NB‑IoT+GNSS, PMIC/fuel gauge, ADC + switch matrix/FPGA, IMU for wake, QSPI FRAM, secure element, antennas. 3) I design schematics/PCB ≤8×5 cm: RF layout (50 Ω), clean analog ground, ESD, testpoints. 4) I implement firmware: scan engine + velostat calibration, noise filters, meaningful‑vs‑bag detection, buffer/compress, BLE↔SIM routing, OTA/secure boot, geolocation, auto elecrode count. 5) I prototype and test: bring‑up, SNR/linearity, antenna tuning, EMI, power profile, extra sensor I/O headers
€5,000 EUR in 9 days
5.6
5.6

For a Pressure Sensor PCB Design, the hard part is balancing sensor scanning accuracy, battery life, Bluetooth/SIM fallback, and OTA-ready embedded reliability. I've handled similar builds involving Electronics, Microcontroller, Electrical Engineering, PCB Layout, usually where the important part was translating the brief into a reliable working system. My approach would be to validate the sensor matrix and power budget first, then design the acquisition PCB, embedded firmware, connectivity fallback, and OTA/admin controls in staged prototypes. For this project, I would focus especially on: - Sensor front-end, matrix scanning strategy, MCU selection, and PCB layout - Battery/power budget, Bluetooth setup, SIM fallback, buffering, and geolocation - OTA firmware, remote activation/deactivation, ownership reset, and admin controls If helpful, I can outline the sensor-to-cloud prototype plan and PCB/firmware risk checklist before committing to the full board. Best, Dr. Syafiq
€5,000 EUR in 21 days
5.3
5.3

I understand you need a compact 8×5 cm acquisition PCB with firmware that reads a 30×30–40×40 pressure matrix, supports BLE + SIM communication, adaptive power management, OTA updates, geolocation, and secure device ownership handling. I will design the full embedded system including schematic, 4-layer PCB layout, power architecture, and RF design for BLE + cellular (LTE-M/NB-IoT or validated SIM module). The sensor front-end will include multiplexed row/column scanning circuitry with signal conditioning to accurately interpret velostat pressure response and support adaptive matrix scaling up to 40×40 resolution. I will also design battery power calculations and ultra-low-power sleep/wake logic based on pressure detection to minimize SIM usage. On firmware, I will implement high-speed scanning logic, local data buffering, BLE provisioning (first-time pairing and ownership binding), SIM fallback transmission, secure cloud communication, OTA firmware updates, and remote device management hooks (activate/deactivate, theft control). Geolocation integration and support for additional sensors (traction/weight) will also be included. The system will ensure secure device identity so data is reassigned correctly if resold, and architecture will support scalable cloud integration for admin control and telemetry. Deliverables include PCB files (Gerber, BOM), firmware source, and full documentation. Thanks, Asif
€5,000 EUR in 14 days
5.2
5.2

As an experienced electrical and automation engineer, I believe my background perfectly aligns with the requirements of your project. I have a strong track record of successful system design, implementation, and maintenance across a range of industries. Additionally, my excellent proficiency in programming Controllers (such as Siemens TIA Portal, Simatic Manager, DELTA PLC) and working on automated scenarios make me ideally suited for tackling the software complexities of this project. I am also well-versed in utilizing different tools such as E-plan P8 V2.6, ABB AC500 PLC program, and Etc for circuit design and programming respectively to ensure safety and efficiency. I have particular experience in designing pressure-sensitive systems like wastewater monitoring plants which involved managing data sent via different communication channels including SIM-based transmission. This experience will be crucial when implementing a robust and efficient data transmission manner based on existence of Bluetooth connectivity. Moreover, based on my previous project experiences with industrial sensors and how to accommodate their various outputs (e.g 30X30 or 40X40), I can assure you that the hardware design
€4,000 EUR in 21 days
5.1
5.1

Dear Client, 8X5 cm size is achievable only if the design is done properly This is much bigger than just a pressure-sensor PCB. What you are really building is a compact matrix acquisition device with Bluetooth, cellular fallback, local buffering, OTA, ownership handling, and battery-aware operation. I can help structure this as a serious embedded hardware product instead of a feature-stacked prototype. My approach would be: ✅ define the acquisition architecture for the pressure matrix, including row/column scanning, front-end conditioning, electrode auto-detection, and sensor expansion ✅ design the PCB around MCU selection, Bluetooth, SIM/cellular module, geolocation, local storage/buffering, battery monitoring, and RF coexistence ✅ build the firmware direction around usage detection, batching, OTA, remote activation/deactivation, and ownership reset logic For this system, the first phase should not be layout. It should be architecture validation, because 30×30 or 40×40 sensing, cellular power draw, and matrix scan timing will define the whole design. Two key questions: 1. Is the 20 MHz scanning target a hard requirement or an upper exploration limit? 2. Should the first prototype prove the full 40×40 matrix, or a smaller validated section first? If you message me, I can outline a practical first-phase architecture so the design starts from a buildable foundation. Best regards, Prat PCB Must Innovations
€3,000 EUR in 30 days
6.4
6.4

I am excited to submit my proposal for your Pressure Sensor PCB Design project. With experience in analog and mixed-signal PCB development, I specialize in designing compact, reliable, and high-precision sensor interface circuits tailored for industrial, automotive, and embedded applications. I understand the critical importance of signal integrity, low-noise routing, power stability, and accurate sensor calibration when working with pressure sensing systems. My approach focuses on creating efficient multilayer PCB layouts optimized for performance, manufacturability, and long-term reliability. For this project, I can assist with schematic capture, sensor signal conditioning, ADC integration, microcontroller interfacing, power management, and complete PCB layout design using industry-standard tools such as Altium Designer, KiCad, or Eagle. I will ensure proper grounding techniques, EMI/EMC considerations, trace optimization, and component selection to achieve stable and accurate pressure measurements. If required, I can also support prototype testing, debugging, firmware coordination, and preparation of manufacturing files including Gerbers, BOM, and assembly documentation.
€3,000 EUR in 7 days
4.1
4.1

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
€3,340 EUR in 7 days
4.7
4.7

Hi, 1. I understand you need a compact embedded acquisition board (≤8×5 cm) capable of scanning a high-density pressure matrix (30×30 / 40×40), processing pressure data at high speed, and transmitting intelligently over Bluetooth + Cellular (SIM) with OTA and remote management. 2. I have strong experience in embedded systems, sensor acquisition, RF-enabled IoT devices, and power-aware architectures, including ESP32-class systems, cellular connectivity, and production-oriented PCB design. 3. Relevant experience: * Designed water sensor acquisition systems with LoRA wireless and real-time processing * Built BLE + battery powered vibration sensor for machine fault detection * Developed battery-powered embedded systems with delta OTA and remote management * Worked on compact sch & PCB for automatic audio system 4. My approach: a) Hardware: * MCU selection * High-speed matrix scanning architecture (mux based) * RF integration (BLE + LTE + GNSS if required) * Battery/power management with sleep optimization b) Firmware with OTA updates 5. Deliverables: * Schematic + PCB + Gerbers + BOM * Embedded firmware + OTA pipeline * Bring-up and test documentation 6. I focus on real-world manufacturable IoT systems balancing RF, analog sensing, and power efficiency. 7. I am a preferred freelancer with 5 star rating and repeat customer. Regards, Vishal
€4,900 EUR in 7 days
3.7
3.7

With over a decade of experience in electrical engineering, electronics and embedded systems, I am equipped with the necessary skills to provide an excellent solution for your project. My proficiency spans from PCB design to hardware constraints and software management. Your particular needs for a compact PCB, Bluetooth/SIM communication, efficient power usage, support for additional sensors including traction and weight sensors, geolocation capability and remote device management all fall well within my area of expertise. Moreover, my vast experience in system optimization ensures that your project will receive meticulous attention to configuration changes and remote updates while maintaining robust functionality. Durability is crucial, and I have validated the performance of several possible components such as the ESP32 to ensure we deliver a rugged solution within required constraints. Furthermore, proficiency in technical documentation is vital particularly in a project involving complex technical systems like this one. To this end, I guarantee structured technical reports that ensure proper ownership handling including when the devices are resold and data transmission to previous users is halted. I am well versed in delivering reliable and high-quality solutions using industry-standard tools across multiple domains making me your ideal choice!
€4,500 EUR in 7 days
3.5
3.5

Hi there, High-density pressure-matrix acquisition systems require careful analog front-end design, multiplexed high-speed scanning architecture, RF isolation, and aggressive power-management strategy to maintain reliable sensing within compact embedded hardware constraints. We can develop the complete PCB and embedded ecosystem including Bluetooth/SIM communication, adaptive matrix detection, OTA firmware infrastructure, geolocation integration, and production-ready embedded firmware architecture. To proceed accurately ✅ Which cellular technology is preferred for deployment (LTE-M, NB-IoT, 4G, GSM)? ✅ Do you already have the pressure sensor electrical specifications and matrix routing details available? ✅ Should the admin platform and mobile application also be included in the development scope? Check portfolio: www.freelancer.com/u/rvwebfreelancing/mech We will be happy to address any questions and ensure a smooth project process. Ready when you are. Buildtrix Studio
€3,100 EUR in 7 days
2.8
2.8

Hello, I've reviewed your need for a compact pressure sensor acquisition board with Bluetooth and cellular data transmission capabilities. This aligns strongly with my experience in embedded systems development, PCB design, and secure data communication. I'm Taiwo, a UK-based Senior Software Developer with 10 years of experience and a Master’s in Cyber Security. I’ve worked with top companies like IBM, UK Government, BMW and Sky. My experience includes managing projects, and building robust backend systems with a focus on security, reliability, and scalability, and I also have an eye for great UI/UX design. My approach involves: ⏺ Thoroughly understanding your sensor requirements and designing a custom PCB within your size constraints. ⏺ Developing robust embedded software to manage sensor data acquisition, Bluetooth/SIM communication, and power management. ⏺ Implementing secure data transmission and ownership handling. ⏺ Providing an admin platform for remote device management and OTA firmware updates. Relevant projects: ⏺ OneKey and Equity Share - where I built secure backend functionality. ⏺ GitSecure - where I built a security tool to fix vulnerabilities in code. Given my background, I'm confident in delivering a solution that meets your requirements. If this approach aligns with your vision, I can start immediately.
€4,000 EUR in 41 days
2.0
2.0

Hello, I’m interested in supporting the development of your compact pressure-acquisition embedded system. I have experience in embedded electronics, high-speed data acquisition, mixed-signal PCB design, BLE/cellular IoT devices, and low-power firmware development. I can assist with: - Custom PCB design (<8 × 5 cm) - Pressure matrix acquisition electronics - High-speed scanning architecture - BLE + SIM communication - OTA firmware updates - Battery/power optimization - RF layout and antenna integration - Remote device management - Sensor auto-detection for 30×30 / 40×40 matrices Proposed architecture: - ESP32-S3 or STM32-based platform - BLE + LTE-M/NB-IoT modem - Buffered local storage for batch SIM transmission - Dynamic matrix-detection firmware - Remote activation/deactivation support Deliverables: - Schematic + PCB layout - Gerbers/BOM/manufacturing package - Embedded firmware source - OTA framework - Bring-up/testing support A few questions: 1. Is 20 MHz scanning a strict requirement? 2. Preferred cellular regions/carriers? 3. Expected pressure update rate? 4. Is the mobile app/backend already defined? 5. Any preferred battery technology? Estimated timeline: 6–10 weeks depending on matrix complexity and modem selection. I’d be glad to discuss the acquisition architecture and help develop a reliable low-power production-ready system. Best regards,
€5,000 EUR in 20 days
1.1
1.1

⭐⭐⭐⭐⭐ ✅Hi there, hope you are doing well! I have successfully designed embedded acquisition boards for pressure sensors in previous projects, integrating seamless Bluetooth and cellular communications for reliable data transfer. The key to successfully completing this project is ensuring robust hardware-software integration that balances high-frequency scanning, power management, and multi-modal communication. Approach: ⭕ Design a compact custom PCB within the 8×5 cm size limit, including MCU selection (e.g., ESP32) for high-speed 20 MHz sensor scanning. ⭕ Implement efficient power management with external battery voltage/current calculation and smart wake-on-pressure detection. ⭕ Develop embedded software for reliable scanning, data buffering, and dual Bluetooth/SIM communication with automatic switching. ⭕ Ensure secure user ownership management and support for OTA firmware updates with remote device control. ⭕ Integrate RF components and additional sensors with geolocation features accessible via mobile app. ❓Could you please clarify the preferred microcontroller options or any specific RF modules you want integrated? I am confident in delivering a scalable, efficient, and fully functional pressure sensor acquisition system meeting all your requirements. Best regards, Nam
€4,000 EUR in 30 days
0.0
0.0

Hi there, As an adept freelancer with proficiency in Circuit Design and Embedded Systems, I am confident that I possess the skills and expertise to produce a top-notch PCB design for your pressure sensor project. In addition to being well-versed in Signal Processing, I have extensive experience in designing systems fueled by external batteries and calculating their voltage and current requirements meticulously. With a thorough understanding of the pressure sensing process outlined in your project, I am capable of creating a scanning system with a target frequency of up to 20 MHz. Furthermore, my qualifications include an understanding of diverse communication methods. Hence, not only can I provide Bluetooth for initial setup and data transmission when possible, but also ensure effective SIM communication as a fallback. My proficiency extends beyond technical details, encompassing aspects such as ownership handling and remote device management - ensuring data privacy even if the device is resold. Moreover, my team at Aesthetic Logic is well-equipped to handle all additional mandatory features like integration of RF components for reliable communication, support for auxiliary sensors, geolocation capabilities, adaptive electrode detection and more. With Aesthetic Logic, expect exceptional, end-to-end solutions under one roof. Let's create a robust system that matches your vision!
€4,000 EUR in 3 days
0.0
0.0

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