Raspberry Pi Zero LoRa Interface PCB -- 2

@ITECH

As an experienced professional with a strong focus on IoT, I am confident that I possess the necessary skills to bring your Raspberry Pi Zero LoRa Interface PCB project to life. My background in circuit design, electronics, microcontroller, and specific experience in PCB layout makes me uniquely qualified for this task. Not only do I have comprehensive knowledge of popular design software such as KiCad, Altium, and EasyEDA, but I have also cultivated an ability to create clean two-layer boards that are optimized for functionality and manufacturability. This understanding aligns perfectly with your requirement for a compact design that simplifies connections while maintaining a high quality of performance. Having successfully completed similar projects in the past, I fully comprehend the importance of minimizing potential issues by thoroughly considering pin assignments and mechanical constraints during the layout process. Furthermore, my familiarity with creating detailed schematics, preparing output files for fabrication, sourcing parts efficiently and providing comprehensive documentation will ensure you receive the deliverables you require, on time and to your exact specifications. With me onboard, rest assured that your Raspberry Pi interface will be impeccably designed to maximize its functionality while minimizing the need for additional wires or break-outs.

@amelectronics

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.

@macroenergy

Dear [Client's Name], Thank you for considering me for the design of your Raspberry Pi Zero LoRa Interface PCB. With my extensive experience in circuit design, electronics, embedded systems, and microcontrollers, I have a solid foundation to effectively address your project requirements. Having successfully designed various PCBs, including power boards and SMPS boards using both Altium and EasyEDA - I can assure you that I possess the technical expertise to generate exceptional output irrespective of the platform used. Moreover, my proficiency in key areas such as digital motor control, analog design, and power electronics is particularly relevant to address the essential aspects of your project like the Li-ion charge/boost circuitry and RFM95 LoRa module among others. I am also skilled in creating schematics, PCB layouts (including Gerber and drill files), BOM and deliver detailed bring-up notes - all tasks critical to producing a successful LoRa interface board. Lastly, my history of adhering to clients' pin assignments, mechanical constraints and utilizing clean two-layer boards by default until there's clear justification otherwise aligns well with your project description. Choose me for this project and rest assured that you're partnering with a professional who will translate your vision into a practical solution that ticks all the boxes you've laid out. Best regards, Metin

@markoa7

Hi there, I’ve reviewed your Raspberry Pi Zero 2 W LoRa add-on concept and I can deliver a clean, compact two-layer PCB that mates directly to the 40-pin header. I’ll design a Li-ion single-cell charger and boost regulator with a simple push-button power-down, plus an RF front-end footprint and matching network sized for an RFM95 module. The board will include a 4-pin UART for the QR reader, a 2-pin trigger header, and a female Pi GPIO header for stacked use. Deliverables include schematic, Gerbers, BOM, and concise bring-up notes. What are the target battery capacity and any preferred RF matching approach or constraints for the RFM95 (e.g., frequency, impedance, enclosure size) to finalize the layout? Best regards,

@trailblazer42

Hello since its a simple PCB I invite you to give me a ping in chat to discuss details. I will provide source files of the project and I can do it in any of the mentioned EDA tools. Check my profile for references and previous work. Im not that active on the freelancer since I have a full time job but I can take this and do it easily if you agree. Cheers

@kingch91

Hi, I have read and understood your requirements. I have experience of more than 7 years as an embedded software engineer and product lead, I can provide you with end-to-end solution for this project from your idea to its actualization and development; or anywhere in between. I have extensive hands-on experience with the following technologies, platforms and programming languages and PCB designs: PCB Platforms: Altium Designer, KiCAD, EagleCAD and few others ARM: NRF52, STM32, ESP8266, ESP32 Other boards: Arduino, Particle Wireless Protocols: BLE, 802.15.4 (OpenThread & Zigbee), WiFi, GSM SIM800 Other protocols: HTTP Development IDEs: Keil, Arduino, Visual Studio Programming Languages: C, C++, python You can see our portfolio/ reviews and feedback regarding automation projects. Please send a message in chat for further discussion. Thank you.

@engrusmanfaiz

I am a professional PCB and embedded hardware engineer with strong experience designing compact Pi-HAT style boards and low-power RF systems. I will design a clean 2-layer stackable board for the Raspberry Pi Zero 2 W with optimized power routing, solid ground return for RF, and minimal EMI coupling. The RF section will integrate the RFM95 with proper impedance control, matching network, antenna clearance, and decoupling strategy suitable for 868/915 MHz operation. Power architecture will include single-cell Li-ion charging, boost regulation sized for Pi peak load, and a soft-latching push-button circuit enabling controlled shutdown and true battery isolation. UART (QR reader) and GPIO trigger headers will be routed with clear pin mapping, protection where required, and documented GPIO allocation. Deliverables include schematic (PDF + native), fabrication-ready Gerbers/drill/PnP, structured BOM with sourcing references, and concise bring-up notes. Before layout, I will confirm GPIO usage, antenna type (IPEX/SMA/PCB), battery capacity target, and mechanical envelope to ensure first-pass success.

@Adeel2k14

Hi, I’m an Electrical Engineer with 7+ years of PCB design experience and currently working as an Embedded System Design Engineer in a reputed firm. I have designed up to 8-layer boards including mixed-signal, high-speed digital, RF, power converters, and analog circuits. I can deliver a clean, compact 2-layer Pi Zero 2 W add-on with Li-ion power, RFM95 LoRa, and required headers—complete with schematic, Gerbers, BOM, and bring-up notes. I focus on reliable, production-ready designs and clear communication. Happy to discuss pin assignments and mechanical details.

@hayteekeys

Hi, KINDLY READ THROUGH MY PROPOSAL THIS IS WHAT I WILL DO - Design a compact Pi Zero 2 W add-on PCB (2-layer, ~80x40 mm est.): female GPIO stacker, Li-ion charge/boost (TP4056 + MT3608 for 5V/1A), momentary button shutdown circuit (GPIO pull to signal Pi halt), RFM95 LoRa footprint + matching, 4-pin UART header, 2-pin trigger GPIO. - Ensure battery-safe, low-power: auto shutdown logic, efficient regulators. - Deliver: KiCad schematics/project, Gerbers/drill/pick-place, BOM (LCSC links), bring-up notes (pin map, jumper/power-down). RELEVANT PROJECTS - 2025: Pi Zero LoRa hat w/ LiPo charge – stacked design, JLCPCB 100 pcs. - 2024: Battery add-on for Pi CM4 – shutdown button, UART peripherals. QUESTIONS - Preferred GPIO for shutdown/button/trigger? - Li-ion cell mAh & charge rate? - LoRa freq (868/915 MHz)? - Any size/mech constraints? I’m a KiCad expert. I can Deliver in 5–7 days. And I am Ready to start immediately

@hayat38402

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:  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.

@mykolalus

⭐⭐⭐⭐⭐ Senior PCB & Firmware Engineer Here! ⭐⭐⭐⭐⭐ I have checked out your project details and I am confident that I can finish your project perfectly. I will design a clean, compact two-layer add-on PCB that integrates power management, LoRa RF, and peripheral connectivity into a reliable stackable solution for the Raspberry Pi Zero 2 W. My approach prioritizes safe Li-ion charging, efficient boost regulation sized for Pi peak current demands, and a soft-latching power circuit that allows graceful shutdown before disconnecting battery output. I have experience implementing load-sharing power paths and push-button power controllers that prevent brownout conditions during boot. For the RF section, I will integrate the RFM95 with proper impedance-controlled trace routing, grounded coplanar layout, and matching network placement consistent with Semtech reference guidelines. The board will maintain clean separation between RF and switching power domains to reduce noise coupling. GPIO allocation will be clearly documented, including UART routing and trigger pin assignment. Deliverables include schematic (PDF + native files), fabrication-ready Gerbers, pick-and-place data, BOM with sourcing suggestions, and concise bring-up documentation. Looking forward to discussing more details. Regards, Mykola

@manusharma2992

As somebody who has built a career on bringing the ideas and visions of others to life, I wholeheartedly understand and echo your goal of needing a streamlined and efficient Raspberry Pi Zero LoRa interface PCB. I have extensive experience in circuit and electronics design, alongside proficient PCB layout work - all ideal for ensuring the smooth functionality of your project. My comprehensive skill set includes working with numerous design programs such as KiCad, Altium, and EasyEDA, allowing maximum flexibility for you while guaranteeing quality deliverables that meet your exact specifications. Additionally, my expertise in specialized services like graphics design will come in handy for creating an easy-to-understand schematic for your project.

@Feriver

Hello, I can design a compact add-on PCB for the Raspberry Pi Zero 2 W that integrates power management, Li-ion charging/boost circuitry with clean shutdown via a push-button, an RFM95 LoRa module footprint with matching network, and peripheral headers for UART and trigger signals. The board will stack directly on the Pi, with optional inverted GPIOs to allow additional boards on top. Deliverables include: full schematic (PDF + native file), PCB layout ready for fabrication (Gerbers, drill, pick-and-place), a BOM with part numbers and sourcing links, and brief bring-up notes covering jumper settings, power-down procedure, and GPIO assignments. I will use KiCad/Altium/EasyEDA based on your preference, keeping the design to two layers unless more are justified. Clarification Questions: Should the UART header support 3.3V logic only, or include level-shifting for 5V peripherals? Are there mechanical height constraints for stacking other boards on top of this PCB? Thanks, Asif

@intellisenseIN

Hi We have designed Pi Zero add on boards since 2008 including Li ion power management LoRa RFM95 integration and clean GPIO stacking Your project is straightforward for us. We deliver complete KiCad design two layer PCB with proper power sequencing RF matching network and all headers placed for clean assembly Gerbers BOM and bring up notes included. Share your preferred GPIO pins for the trigger header and we start schematic today.

@electronicsdone

Best Raspberry Pi LoRa Hardware Design Expert ⭐⭐⭐⭐⭐ Hi, Thank you for posting your project, “Raspberry Pi Zero LoRa Interface PCB.” I’ve reviewed your requirements and can help you design a compact, clean add-on board that integrates power management, LoRa communication, and peripheral connectivity into a single, stackable PCB for the Raspberry Pi Zero 2 W. I bring 11+ years of experience in Raspberry Pi HAT design, low-power battery systems, LoRa (RFM95) integration, and compact two-layer PCB layouts. I’ve delivered GPIO-stackable boards that eliminate wiring complexity while remaining fabrication- and assembly-friendly. ✅ How I’ll Help You Succeed 1. Design a reliable Li-ion charge and boost power stage suitable for battery-powered Raspberry Pi operation. 2. Implement a clean push-button power-cut/shutdown circuit for safe device control. 3. Integrate the RFM95 LoRa module with proper footprint, RF layout, and matching considerations. 4. Create a mechanically sound GPIO-stackable PCB compatible with the Pi Zero 2 W form factor. ✅ Before I start, one quick question: Do you already have preferred GPIO pin assignments for the LoRa module and trigger/UART headers, or would you like me to propose an optimized pin map that avoids conflicts with common Pi peripherals? If you share that, we can align quickly and move forward. Best regards, Prat PCB Must Innovations

@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 so we can discuss further on your project I look Forward to working with you. Best Regards, Abdur-Rafiq

@redbrickamerica

Hi there, We are a team of experienced electronics and embedded system engineers, and we carefully checked your requirement for a compact add-on PCB for Raspberry Pi Zero 2 W integrating power management, LoRa RF section, and peripheral headers into a clean stacked design. We understand the need for Li-ion charge/boost circuitry, push-button power control, RFM95 footprint with matching network, UART header, trigger GPIO routing, and stackable 40-pin GPIO integration. Our team will develop a complete Schematic Design and two-layer PCB Layout ready for fabrication, including Gerbers, drill files, pick-and-place data, and a structured BOM with sourcing references. We will also provide clear bring-up notes covering GPIO usage and power-down logic. Our expertise in PCB Design and Embedded Hardware Development ensures a compact, reliable, and production-ready solution.

@shykhAbubakar

Hello, I can design a compact all-in-one add-on PCB for your Raspberry Pi Zero 2 W that integrates power management, LoRa RF, and required peripherals into a clean stackable board. The focus will be on low-noise power design for Li-ion charge/boost operation, reliable RF layout for RFM95, and a compact two-layer PCB optimized for manufacturability. All work will follow good RF layout practice, IPC PCB standards, and DFM-ready guidelines. Following are the deliverables: • Schematic design and PCB layout • Gerber, Pick- and- Place, Drill files for manufacturing • Bring-up notes • Bill of materials I wanted to ask: • Any maximum board outline or mounting hole constraints? I have 7+ years of experience in projects like: • Compact Raspberry Pi HAT and GPIO stacking boards • Two-layer mixed-signal PCB design with RF and DC-DC sections properly isolated My software expertise includes: • KiCad, Altium Designer, EasyEDA Thank you for considering my proposal. I’m available to clarify and discuss details further through a meeting at your ease. Best Regards, Abubakar

@yaroslavmark

✅Okay, I got what you want exactly. I am a Senior Embedded Hardware Engineer with over 10 years of experience, providing custom PCB design, power management circuits, RF layout for sub-GHz systems, and Raspberry Pi-based embedded solutions. In my opinion, the cleanest way to approach this is to treat the board as a tightly integrated power + RF module rather than just a breakout aggregator. I would design a robust single-cell Li-ion charge/boost stage with proper load sharing so the Pi can run while charging, and pair it with a soft-latching power circuit that safely signals shutdown before cutting power—so it behaves like a polished consumer device, not a dev board hack. This project is very similar to my previous works. I recently designed a 45mm x 52mm two-layer LoRa sensor node using an SX1276 module, MCP73831 charger, TPS61236 boost converter, and a GPIO-controlled load switch with less than 25mV ripple under 400mA load. I’ve also built a Pi Zero W stacked environmental logger board where I routed SPI, UART, and two interrupt lines while keeping RF clearance and impedance clean on a compact 1.6mm PCB. Best regards. Yaroslav