PCB Design and Firmware needed for ESP32 Based NFC Reader with Relay Output

@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.

@SPARKtechBD

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.

@hamzazayyad

Hello, i have good experiance i ESP32, Arduino coding, nfc, and electronics design, so I can design a compact ESP32-based NFC reader module with relay control, covering both hardware and firmware. Scope: * ESP32 (Wi-Fi + BLE) * NFC transceiver (e.g., PN532) * Relay output (safe driver stage) * Wide input 10–24V DC with efficient power design (buck → 5V, LDO → 3.3V) * Protection (reverse polarity, filtering) * LED indicator headers **Firmware:** * NFC UID reading * Tag validation logic * Relay toggle on authorized tag * Low-power sleep mode * Optional BLE/Wi-Fi config **Deliverables:** * Schematic + PCB layout * Gerber files (manufacturing-ready) * BOM (LCSC/JLCPCB if needed) * Firmware source (ESP-IDF or Arduino) * Documentation Timeline ~10–14 days total Best regards Hamza

@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

@nehasingh17

This sounds like a solid and practical NFC-based control module, but it needs careful handling around power design, RF layout, and relay isolation to make it reliable in real-world environments. We at HardFault have worked on similar ESP32-based control boards with NFC/RFID, relay driving, and industrial voltage inputs, so we understand the importance of stable multi-rail power, proper antenna tuning, and noise isolation especially when switching loads like door locks or motors. We can design the complete solution for you — from schematic and compact PCB layout to firmware that reads NFC UID, validates it, and safely toggles the relay with sleep-mode optimization. We’ll also ensure clean power conversion from 10–24V, proper protection (TVS, reverse polarity, etc.), and a production-ready Gerber + BOM package. Do you already have a preferred NFC transceiver (like PN532 or others), or would you like us to suggest the best option based on range and cost?

@isurutech

Dear Sir, I would like to present myself as a prospective candidate for your project. I possess sound knowledge and experience in electronics and programming, including schematic design, PCB design, and firmware development. After reviewing your project description, I believe I would be an excellent candidate, as my skills align well with your project requirements. While going through the project details, I had one question: where will the NFC card IDs be stored, and approximately how many IDs are expected to be stored in the system? Please visit my portfolio to view some of the PCBs I have designed. I will be using KiCAD for PCB design and Arduino IDE for firmware development. Please do not hesitate to contact me if you have any questions. Looking forward to your favorable reply. Sincerely, Isuru Athukorala

@hsierramtz

Hello, Your project fits very well with the type of embedded systems I design regularly: compact ESP32-based boards integrating communication interfaces, power electronics, and reliable control outputs. From a technical standpoint, I would focus on a few critical areas to ensure a robust and production-ready design: • A stable 10–24V input power stage using a properly selected buck converter, including protection (TVS, reverse polarity, filtering) to ensure reliability in real-world environments. • Clean integration of the NFC transceiver (e.g., PN532) with proper antenna layout considerations to guarantee consistent tag detection. • A reliable relay driver stage (transistor + flyback protection) to safely control external loads. • Optimized ESP32 design with attention to decoupling, grounding, and low-power modes for efficient operation. I have hands-on experience designing custom ESP32 PCBs optimized for assembly, working with ESP-IDF, and developing hardware + firmware together to ensure stable system behavior. Deliverables will include: • Complete schematic and PCB (KiCad) • Manufacturing-ready Gerbers • BOM with readily available components (JLCPCB/PCBway) • Clean, documented firmware (ESP-IDF) • Design notes for bring-up If needed, I can also suggest improvements in power architecture or layout to enhance reliability and simplify manufacturing. I’d be glad to collaborate and deliver a clean, well-engineered solution. Best regards, Hammurabi

@engrhasan01

I’m interested in supporting your Electrical Engineering exam preparation, specifically in Circuit Analysis (BJT, Cascode Amplifier, and Op-Amps). I have a strong background in Electrical Engineering with hands-on experience in circuit analysis, analog electronics, and tutoring technical subjects, helping students break down complex concepts into simple, exam-ready understanding. My Approach • Start with clear concept building (no memorization without understanding) • Step-by-step circuit solving techniques for exam problems • Focus on frequently asked patterns in BJT, Op-Amps, and Cascode amplifiers • Guided practice with past-paper style questions under timed conditions ? Materials Used • Sedra & Smith (Microelectronic Circuits) • Boylestad (Electronic Devices) • Past exam questions + custom practice sets Outcome You’ll be able to confidently recognize circuit types, apply correct formulas, and solve exam problems faster with fewer errors. Format Can provide: • Step-by-step explanations • Short revision notes • Practice problem walkthroughs or mock exams Best regards, Hasan

@nichitav7

Hello I will design a production-ready ESP32-based NFC relay module with robust power architecture and secure tag validation firmware for reliable real-world access control systems. Core project focus is transforming NFC UID detection into deterministic relay control with stable power handling from industrial 10–24V inputs. Approach: - Hardware design: ESP32 MCU + NFC transceiver (PN532 / ST25-class), relay driver stage, opto/isolation where needed - Power system: wide-input 10–24V DC with buck conversion to 5V/3.3V rails, surge and reverse polarity protection - I/O design: relay output stage + LED indicator headers for system state feedback - Firmware: NFC UID read, whitelist validation, relay toggle logic, debounce handling - Power management: deep sleep + wake-on-interrupt NFC event strategy - PCB layout: compact routing, EMI control, relay separation from RF/logic zones Expected outcomes: - Stable NFC-based access controller ready for deployment in physical automation systems - Clean firmware architecture for future expansion (cloud, logging, multi-relay) - Manufacturing-ready PCB with reduced redesign risk Deliverables: - Full schematic design - Optimized PCB layout - Fabrication-ready Gerber files - Complete BOM with sourcing notes - ESP32 firmware (ESP-IDF or Arduino framework) - Technical design documentation for integration and maintenance Regards, Nichita.

@ElecHamza

Hi, I will design a compact and robust NFC Reader module featuring an ESP32 microcontroller and a high-performance NFC transceiver to ensure reliable tag detection and automation control. I will engineer a high-efficiency multi-rail power supply to handle your 10–24V DC input and implement a secure relay output logic for driving external loads like door locks or motors. Every aspect of the hardware—from controlled-impedance PCB layout to low-power firmware—will be optimized for stability and long-term deployment, providing you with a production-ready fabrication package and well-documented source code. I am ready to apply my embedded systems expertise to deliver a high-quality, fully integrated solution for your project. Best regards

@alluankit01

Hi, I can design the ESP32 based NFC reader module with relay output, wide input power support, PCB files, and firmware. I understand the key requirement is a compact and reliable access/control board, not just an ESP32 prototype. I’ll design the schematic around ESP32, NFC transceiver, relay driver, 10–24V DC input protection, multi-rail power supply, LED indicator headers, and safe GPIO-controlled relay switching for locks, motors, or automation equipment. For firmware, I’ll implement NFC UID reading, valid tag matching, relay toggle logic, LED status output, and sleep mode support using ESP-IDF or Arduino depending on your preference. The code will be clean and commented so you can update allowed tags or relay behavior later. Deliverables will include schematic, PCB layout, Gerbers, BOM, firmware source, and design notes for fabrication and testing. Please share your preferred NFC chip, relay load rating, board size target, and whether tag authorization should be hardcoded or stored in memory. Best regards Ankit

@exequielbena

Hi, how are you? I’m an Electronic Engineer with experience in embedded systems, PCB design, and firmware development. I also teach university courses related to processors, real-time systems, and programming fundamentals, which has given me strong experience working with microcontrollers, low-level programming, and hardware/software integration. I have previously worked on PCB routing and custom embedded hardware projects, and I’m very comfortable using KiCad for both schematic capture and PCB layout design. Your project is very interesting and aligns well with my background, especially considering the combination of ESP32 firmware, NFC integration, power supply design, and relay control in a compact PCB. I can help with: Complete schematic and PCB design Power supply stage for 10–24V input ESP32 + NFC integration Relay driver circuitry Firmware development (ESP-IDF or Arduino) Manufacturing-ready Gerbers and BOM Design documentation Before starting, I’d like to clarify a few details: Do you already have a preferred NFC transceiver or module in mind? Are there any target size constraints for the PCB? What relay current/voltage ratings are required for the external load? I’d be happy to review the project requirements in more detail and help develop a reliable, production-ready solution. Best regards!

@jb095

Hello, I can design your ESP32-based NFC reader module including schematic, PCB, and firmware. ESP32 + NFC integration Relay control on valid tag detection 10–24V input with stable power design Compact PCB with proper NFC layout Firmware: UID reading, relay control, low-power mode Deliverables: Schematic, PCB, Gerber, BOM, firmware source, and documentation. I focus on reliable, production-ready designs. Design scope and cost can be adjusted if needed. Best regards. Jude.

@TheTech15

Hello . Iam experienced computer engineer in arduino and esp32 programing. Also in designing desktop and android apps to control and monitor arduino systems. Also PCB design. I can execute your project and will be with you step by step until we finish the project and you are satisfy. Nice to me to hear drom you….

@Mwaleed30

Being an Electronic Engineer, Hardware Designer and a skilled PCB Designer with 3 +years of experience I make proper R&D projects Full schematics and real life single layer ,2 layers ,4 layers ,6 layer and multi-layers PCBs projects (i.e: 1:PCB of compact ear buds 2:Pcbs for compact usb with advanced security features 3:Pcbs which involves USBs 4:Also i made many large projects which handles high voltage AC and DC 5: 6 -layers PCB of Arm Cortex Processor involving Programming 6: Programmable Frequency Generator PCB 7: Compact Smart SOS PCB 8: High Volatge Ac to DC Converter with MCU STM32 programmability’s for 10KW system 9: 10KW AC Inverter with output voltage 24V 10: Qi 1.3 Wirless Charger Transmitter and Reciever 11: PCB for agricultural watering system that controls 50 fig trees with expansion capability to 100 trees) 12: Custom IO Board Design for Raspberry Pi CM5 with Integrated RP2040 And many more I have advanced level grip on softawares like Easyeda-Pro ,Kicad, Altium I will show you my PCB work separately I will handle your project and made it perfect in the best cheapest price and do its customisation First see me work then Hire me You can also see my Portfolio which reflects some of my PCBs projects In the end i will assure you that you will get professional level and great quality work in the best price Thankyou

@ArasakaSystems

Ross here from Arasaka Systems, I can help with your NFC Reader module design. It's exciting to see projects focused on compact, integrated systems, and I've developed something similar in the past involving embedded systems with ESP32 microcontrollers and custom PCB layouts. I understand you need a clean, professional, and high performing design that combines ESP32, NFC transceiver, and relay control with multi-rail power supply and LED indicators—exactly aligned with your requirements for functionality and firmware support. Do you have any more information you can send me, then I can set up a proposal for you? I offer embedded system design, PCB layout, firmware development, and full documentation expertise. It would be a pleasure to be of assistance. Regards, Ross, Arasaka Systems

@letswork92

I understand that you're looking for a reliable embedded systems and PCB design engineer to create a compact NFC Reader module using the ESP32 microcontroller. This project is crucial for controlling external devices, such as door locks or motors, based on NFC tag detection. With over 12 years of experience in embedded systems and PCB design, I specialize in designing efficient modules that meet specific requirements. Utilizing the ESP32 allows us to leverage its Wi-Fi and Bluetooth capabilities alongside an NFC transceiver for seamless communication. I can ensure that your design will support various input voltages (10-24V DC) and include relay output controlled by GPIO, along with proper visual feedback through LED indicators. I will deliver a complete schematic design, PCB layout, Gerber files ready for fabrication, a comprehensive Bill of Materials (BOM), and well-documented firmware source code using either the ESP-IDF or Arduino framework. Could you please confirm if you have any specific preferences regarding the NFC transceiver model?

@xan01

I already see a clean way to execute this. I specialize in ESP32-based designs, NFC hardware, and compact PCB layouts, including relay control and production-ready firmware. I’ve shipped similar reader/actuator boards before, so combining NFC, ESP32, and a reliable relay output in a small footprint is very familiar territory. You’re looking for a compact, stable NFC reader module that can detect cards/tags, process them via ESP32 firmware, and safely switch a relay output for real-world control (locks, access, power, etc.), all in a clean, manufacturable PCB design. At a high level, I’d define your exact NFC use cases, select the right NFC front-end, design a noise-robust PCB around the ESP32 and relay, and deliver tested firmware that handles NFC events and relay logic reliably. Quick question: do you already have preferred NFC chip/module and relay specs, or are you open to recommendations based on cost and availability? Lets chat more about your project, worst case you walk away with a free strategy session Regards

@theaizaz

I've shipped ESP32 + NFC boards before — this is exactly my stack. Here's how I'll deliver every requirement: HARDWARE • ESP32 as MCU with Wi-Fi & BT, paired with PN532 or RC522 NFC transceiver • 10–24V wide-input buck regulator → 3.3V & 5V rails for ESP32, NFC IC, and relay coil • Relay driver stage (MOSFET + flyback diode) on ESP32 GPIO for safe switching of door locks, motors, or automation loads • LED indicator header pins for status feedback • Compact, clean PCB layout with proper decoupling and DFM-ready design FIRMWARE (ESP-IDF or Arduino — your choice) • NFC UID read on tag detection • Relay toggle on valid tag — configurable whitelist support • Deep sleep between reads for low power operation DELIVERABLES • Full schematic + PCB layout • Gerbers, drill files, BOM, assembly notes • Firmware source code, documented and ready to flash • Design documentation Typical turnaround: 7 days. What NFC tag format do you need to support (MIFARE, NTAG, etc.)? And is the relay output NO or NC by default? Happy to start immediately.