STM32 Hub and Gateway Design

@tshibsamuel477

Hi there, I’ve read your brief carefully and can deliver both STM32 boards fast and to a production standard. I’m a mechatronics-focused hardware designer (~5 years) with deep experience on STM32F1/H7, multi-rail power, RF/cellular, and modular bus architectures. I’ve already worked with all the components you listed: STM32F103C8T6 + H743VIT6, ESP32-WROOM-32, SIM7600/EC200U, LAN8720A, MAX485, INA219, DS3231, TCA9548A, MicroSD/SPI Flash, optional SDRAM, GPS (NEO-6M/4G integrated), 20-pin IDC buses, and robust protection (ESD/TVS/PTC, reverse polarity). I’ll provide clean schematics and 4-layer layouts (ENIG, 2 oz), BOM with LCSC refs, Gerbers/CPL/3D, pinouts, test points, and example firmware (Board A: LED/WiFi/I2C scan; Board B: LED/SIM/GPS). My approach keeps both boards connector-compatible while optimizing cost/DFM and thermals, with clear documentation and ordering support (JLC/PCBWay). Message me and I’ll share a concise timeline and cost optimization plan. Best regards, Samuel tshibangu

@danish2051

Hi I previously design same your requirments. Almost 50% work are same.i am best canidate for this work.

@dwashil3000

I have done a similar project. I am interested to do this too. Pls let me help you in this project too. I am sure you will hire me again and again after this work. Hoping to hear from you soon.

@Mahmoud00Ibrahim

I'm an experienced embedded systems designer with extensive STM32 development experience, having designed over 15 production boards using both STM32F1 and H7 families. I currently use Altium Designer 23 (with full 3D clearance checking) and have particular expertise in: Mixed-signal IoT designs (sensor networks, cellular gateways) Robust power architectures (9-36V input, multi-rail systems) 4G/WiFi integration (SIMCOM modules, ESP32 co-processors) University research projects (including environmental monitoring systems) For your distributed environmental monitoring system, I'll apply this experience to create two optimized boards that share: ✔ Identical 20-pin bus architecture for full modularity ✔ Industrial-grade protections (TVS, PTC fuses, ESD hardening) ✔ Field-deployable power systems (Board B's 9-36V input + backup battery) Relevant projects take a look on my portfolio i have 6-layer board with stm32H MCU like your project best regards Mahmoud Ibrahim

@Bhartifreelancer

I believe my diverse skills and experience make me a strong contender for your project. Although my background may be different from the specific requirements of your STM32 boards, my flexibility and adaptability within the technology sector has been proven over the years. As an experienced freelancer, I have successfully transitioned between various tech-related fields, proving my ability to quickly learn and master new technologies. Additionally, it's worth noting that my extensive knowledge in SEO and Content writing is highly beneficial when it comes to technical writing and documentation - essential components of any design project. I can assure you of well-documented designs with clear schematics, detailed CCSLs, comprehensive assembly files and documentation - all delivered professionally -- what you expect from this proposal. Moreover, with a commitment to ensuring client satisfaction, I will closely collaborate with your in-house team, continuously keeping you in the loop during design iterations and consistently striving for efficiency and innovation. In conclusion, while my profile might not align perfectly to the specific requirements of your project, my versatility, attention to detail, and dedication make me a fitting choice that will guarantee a successful project completion.

@as348

Hi i have more than 10 years experienced in circuit design and development in my past i have designed lot of of stm32 based hardware i can design best way under emimec

@kereshm

I am the right fit for your project as a Masters in Computer Science Student. I have extensive experience with STM32F1 and STM32H7 families, including cellular integration projects. I understand the need for clean, professional, and user-friendly designs for Board A and Board B. While I am new to the platform, I have tons of experience as a Masters in Computer Science Student and a Software Engineer in Fintech as well as doing a few other projects off site. I would love to talk to you more about your project to see where your head is at and what other feature requirements are needed. Regards, Keresh

@kimzyy

Hi, I’ve worked with STM32 boards before, including projects on both the F1 and H7 series, and I’m comfortable handling everything from schematic design to PCB layout and preparing Gerbers/BOM for manufacturing. I also have experience integrating ESP32 modules, cellular modems, and GPS, so I understand the power, protection, and connectivity considerations your design will need. For this project, I’d approach it by first standardizing the 20-pin connector interface, then developing Board A for validation before moving to the more complex Board B with cellular and gateway features. This way, both boards remain fully compatible while reducing design risks. I’d be glad to discuss your requirements in detail

@NawaazJasat

We are a perfect match-your search is over I have extensive experience with STM32F1 and STM32H7 families, having previously worked on projects involving cellular integration. I specialize in designing clean, professional, and user-friendly IoT development boards. My approach involves designing Board A for sensor data collection with STM32F103, ensuring seamless integration with Board B, focusing on data aggregation and cellular communication with STM32H743. I will create schematics, PCB layouts, Gerber files, 3D models, BOM, assembly files, documentation, and test code in KiCad/Altium. With a keen eye for detail and quality components, I guarantee punctual delivery and client satisfaction. Let's collaborate to bring your modular IoT research project to life. lets Chat I am currently available and would love to get started on this project

@marioomapo

Hi there, I can design both Board A (STM32F103 Local Hub) and Board B (STM32H743 Gateway with Cellular) for your modular IoT project. I have experience with STM32F, 32-bit DSPIC33F, and other MCUs, and although this will be my first cellular integration, I’m confident in applying my embedded systems expertise. I’ll maintain a shared connector standard between boards, with modular design for easy replication. Timeline: 1 week for schematics, PCB layout, BOM, Gerbers, and documentation. Cost optimization: <$100 per unit. Deliverables include schematics, PCB layout, Gerbers, BOM, pick & place, test procedure, and firmware guide. Looking forward to collaborating! Mário