Modify PCB for MCP2025 and ESP32

@MuhammadUzair16

Hi, I am an embedded systems engineer with over 16 years of experience developing PCBs, firmware, and complete consumer-grade products from concept through production. I can adapt the existing LG controller hardware for the ESP32-ETH01 V1.4, integrating the MCP2025/TJA1021 LIN interface while accounting for the RJ45 connector and overlapping end pins so the assembly fits correctly. I will review the Gerber, placement, and BOM data, reconstruct or amend the design as required, map the appropriate ESP32 serial pins, and verify the LIN circuitry, grounding, protection, and power budget. Particular attention will be given to regulator capacity, startup current, connector pinout, clearances, and trace widths so the ESP32 board can be plugged in and powered reliably. I can deliver updated manufacturing files, BOM, placement data, and clear connection documentation, with firmware-side guidance if needed. Are editable schematic/PCB source files available, or should the board be reconstructed from the Gerbers? Please also confirm the air-conditioner supply voltage and preferred LIN transceiver, MCP2025 or TJA1021. Please contact me to discuss details.

@macroenergy

As a seasoned PCB designer and experienced professional in various relevant domains including Analog Design, Electronic Design, Embedded Systems, and Power Electronics to mention a few, I stand confident in my ability to successfully complete your project of modifying the PCB for the MCP2025 and ESP32 devices. My proficiency with software such as Altium and Easyeda and my ability to work effectively with Gerber files ensure smooth communication throughout the entirety of the project. Integrating an TJA1021/MCP2025 chip to allow an ESP32-ETH01v1.4 board to communicate with an aircon unit using LINBUS, while also taking care of the overlap between the first two pins on the ESP board and the RJ45 port placement may seem complex, but I assure you it's familiar territory for me. Overlapping with unique placements requiring adaptation is an aspect of my attention to detail during hardware design. Furthermore, you're looking for a candidate who is experienced and intimately familiar with both MCP2025 and ESP32 ETH01 as well as having great understanding of power delivery circuitry requirements to ensure adequate power supply for your device. I possess this trifecta experience which makes me the go-to person for your desired project outcomes. Let's get started towards transforming your open-source project into a cutting-edge reality!

@majeed219

With a comprehensive skill set that spans PCB design, electronics engineering, and embedded systems, I bring a wealth of expertise to the table. Over the years, I've worked extensively with various Microcontrollers including, but not limited to ESP32 ETH01 V1.4 and acquainted with robust Circuit Design. Therefore, integrating an MCP2025 chip into your project's PCB is well within my wheelhouse. I also relish challenges that call on me to modify existing designs with precision, featuring an astute eye for detail ensuring power delivery circuitry is optimized. Navigating Gerber files and comprehending BOM and placement information?...No worries! These projects have formed the core of my professional journey thus far. I am equally comfortable working with known methodologies like KiCAD as well as more complex platforms like Altium and Eagle when it comes to PCB Design. On-time delivery and top-notch quality without compromise at fair rates are my signatures – let's get started on bringing your idea to life!

@tshibsamuel477

Hi there, I carefully reviewed your requirement to modify the existing PCB so an ESP32-ETH01 v1.4 can interface with the LG air-conditioner LIN bus through an MCP2025/TJA1021-class transceiver while also receiving adequate power directly from the updated board. I am a mechatronics engineer with almost half a decade of experience in PCB design, embedded electronics, UART and similar interfaces, power-supply circuitry, hardware prototyping, and reverse engineering using Altium Designer. Working from Gerber, BOM, and placement data is also well aligned with my reverse-engineering background. I can handle the mechanical fit around the ESP32-ETH01 and RJ45 connector, reconstruct and update the relevant circuitry, route the serial/LIN connections, and review the power path so the ESP32 board can operate reliably when plugged directly into the redesigned PCB. My existing PCB and embedded-hardware experience allows me to approach this efficiently without learning the core technologies from scratch. Please send me a message so we can discuss the project and start. Best regards, Samuel tshibangu

@kkirandeep582

With extensive expertise in PCB design and modifications, particularly with components like the MCP2025 and the ESP32-ETH01 V1.4, I am confident that I am your best-suited freelancer for this project. I have had many experiences working on similar tasks, leveraging skills in Gerber file manipulation and BOM checks for accuracy and precision. What sets me apart is my holistic skillset that encompasses not only PCB design but also other complementary skills such as 3D modeling and rendering, which can be invaluable for visualizing the final product. Speaking of which, I understand the need for your ESP32 board to physically fit on the RJ45 port placement. As an experienced engineer, I'm no stranger to these sort of engineering hiccups and will ensure a clean and compact modification to circumvent overlapping. I take utmost pride in my attention to detail and ability to deliver on time without compromising quality. My end goal is always complete client satisfaction, which means not only fulfilling all the technical requirements but also ensuring an efficient power delivery circuitry for the ESP32 from this PCB redesign. Partnering together, we can efficaciously replace LG's wifi module with a cutting-edge ESP-based ethernet system while preserving its functional efficacy. Let's bring your vision to life with precision!

@azraazeen9

As an experienced electrical engineer with a specific focus on PCB design and modification, I am confident in my ability to deliver outstanding results for your project. Not only am I proficient with relevant components like the MCP2025 and ESP32-ETH01 V1.4, but I have a deep understanding of Ethernet connectivity, power delivery circuitry, and its significance when it comes to serial communications. Over the years I've worked extensively with Gerber files, placement codes, and BOMs which will make it easier for me to navigate your project's system files and revise the PCB design accordingly. My portfolio also demonstrates an unmatched attention to detail and accuracy - skills that are essential given the complex nature of your task. Finally, by incorporating my solid expertise in circuit design, prototype development as well as efficient documentation i can effectively meet all your requirements in a way that not only respects your existing project but propels it further forward. Working together, we can create a solution that retains your project's mission of removing LG airconditioners' wifi modules while adding functionality like ethernet connectivity. I look forward to discussing the specifics of your project so we can get started on this exciting endeavor.

@hayteekeys

HI, KINDLY READ THROUGH MY PROPOSAL I will modify the existing open-source PCB so it cleanly integrates an MCP2025 (or TJA1021) LIN-bus transceiver with the ESP32-ETH01 v1.4, resolves the RJ45 pin-overlap issue, and delivers reliable power and serial communication when the ESP32 is simply plugged in. MY APPROACH
 ✅ Adapt the current schematic and layout for ESP32-ETH01 v1.4
 ✅ Add MCP2025/TJA1021 with correct LIN-bus interfacing and serial traces 
✅ Resolve physical pin overlap with the RJ45 connector for a proper fit 
✅ Ensure robust power delivery so the ESP32-ETH01 runs directly from the board
 ✅ Update Gerbers, placement data and BOM while preserving the original project intent DELIVERABLES • Updated schematic and PCB layout files • New Gerber, pick-and-place and BOM packages • Clear notes on pin mapping, power and LIN connections QUESTIONS 1 Preferred CAD tool for the modification (KiCad, Altium or other)? 2 Do you already have a preferred part (MCP2025 vs TJA1021) and footprint? 3 Any mechanical height or enclosure constraints beyond the RJ45 overlap? Ready to start as soon as the current Gerber, placement, BOM and any additional mechanical notes are shared.

@Adeel2k14

Hi, I’m an Electronics/PCB Design Engineer with 8+ years of PCB design experience and strong experience with ESP32, LIN, UART, and power circuits. I can modify the existing design to integrate the MCP2025/TJA1021, connect it correctly to the ESP32-ETH01 V1.4, and ensure adequate power delivery. I’ll carefully account for the RJ45 and pin-overlap mechanical constraints and update traces/components accordingly. I can work from the available Gerbers, BOM, and placement files, while reviewing the original open-source design for reference. I’ll provide manufacturing-ready outputs and verify the design before fabrication.

@sakshis576

As an experienced electronics engineer with a strong background in PCB design, I am confident in my ability to tackle this project and provide you the exact modifications you need for your PCB. My proficiency extends to working with Gerber files, which will streamline any adjustments required at a component and trace level. In addition, I have hands-on experience working with both the MCP2025 and ESP32-ETH01 V1.4, ensuring I fully understand their specifications and compatibility requirements. Given that your project is based on an open-source initiative with the aim of enhancing convenience and privacy, my approach of meticulousness aligns perfectly. I understand the critical need to incorporate the necessary components such as RJ45 port placement adjustments fitting the first two pins of the ESP board, enabling adequate power delivery and facilitating seamless serial communication with TJA1021/MCP2025.

@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:  Antenna Design (CST, HFSS)  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.

@Mahmoud00Ibrahim

Hi, I understand the requirement clearly. You already have an existing PCB based on the open-source LG controller, and the main task is to adapt it for the ESP32-ETH01 V1.4 with Ethernet and LIN communication. I can modify the existing design to: Integrate the MCP2025 LIN transceiver Add the required connectors for direct plug-in of the ESP32-ETH01 V1.4 Map the UART pins correctly between the ESP32 and MCP2025 Design/verify the power delivery so the ESP32-ETH01 receives a stable supply with sufficient current capability Account for the RJ45 and overlapping ESP32 header pins to ensure proper physical clearance and fit Update traces, components, and routing where required Work from the provided Gerbers, BOM and placement files and use the original open-source hardware as a reference I have strong experience with ESP32, automotive/industrial communication interfaces, power protection, and PCB modifications, including working with existing designs rather than unnecessarily redesigning everything from scratch. I can also verify the final design against the ESP32-ETH01 V1.4 pinout and provide production-ready fabrication files. Ready to review the existing files and start the modification.

@yaroslavmark

Hi, I have experience modifying ESP32-based control boards with Ethernet, UART/LIN interfaces, protected power inputs, and production-ready PCB revisions, including systems with 10+ mixed-signal I/O channels. I have also reconstructed and updated designs from Gerbers, BOM/CPL data, and incomplete source files where connector geometry and mechanical fit were critical. Approach ✅ I will reverse-engineer the existing PCB from Gerbers/BOM/CPL, then integrate the MCP2025/TJA1021 LIN transceiver, required protection, and UART connections to the ESP32-ETH01 v1.4. ✅ I will verify the available supply rail, calculate ESP32-ETH01 peak current margin, and update the regulator, filtering, decoupling, and connector power paths where necessary. ✅ I will redesign placement around the RJ45 overhang, confirm header clearance and mating geometry, then run DRC/DFM and regenerate fabrication and assembly files. Questions ✅ What voltage/current is available from the LG air-conditioner connector, and is the existing board already regulating this rail? ✅ Do you prefer MCP2025 or TJA1021, and which ESP32 UART pins should remain available for programming/debug? ✅ Can you provide the Gerbers, BOM, CPL, board dimensions, and exact ESP32-ETH01 v1.4 mechanical drawing? Best, Yaroslav

@hamzazayyad

Hello, The main challenge is adapting the existing PCB to support LIN communication through MCP2025/TJA1021 while making the ESP32-ETH01 V1.4 a true plug-in module, with reliable power and no mechanical conflict with its RJ45 and first two pins. I can modify the existing design around the available Gerbers, placement and BOM, including: * MCP2025/LIN transceiver and UART connections to the correct ESP32 pins * ESP32-ETH01 V1.4 connector/pin mapping and trace updates * Power delivery sized for the ESP32 module and its operating/transient current * PCB placement and clearance around the RJ45 area to ensure the module fits correctly I would first review the existing PCB files, BOM, Gerbers and ESP32-ETH01 pinout, then define the required schematic/net changes, update the PCB layout and routing, and verify connectivity, power paths and physical clearances before delivering the amended design files. My background in embedded hardware, PCB design, ESP32 and communication interfaces is directly relevant to this modification. Best regards, Hamza

@mahmoudralizadeh

Hi, So this is a targeted modification, not a redesign — take the existing LG HVAC controller PCB, add a TJA1021/MCP2025 transceiver for LIN-bus comms to the aircon, and reroute/repower everything so an ESP32-ETH01 v1.4 drops straight in, including working around the pin overlap with the RJ45 footprint. I'll start by reviewing the existing Gerbers, placement and BOM files plus the original ESP32-DevKit-based schematic from the repo, so the LIN-bus wiring from that reference design carries over correctly to the new transceiver placement. Given the ETH01's pin layout physically conflicts with the RJ45 connector position, that's the trickiest part — I'll work out the cleanest routing path there before touching power delivery, then confirm the updated board supplies enough current for the ESP32-ETH01 under Ethernet load, not just idle draw. Quick question — do you have a preference for keeping this on the same board outline/size, or is some expansion around the RJ45 area acceptable if it makes the ETH01 fit cleaner?

@shivkantverma

Hi, Greetings! I am interested in working on your project. Could you please share the design details and technical requirements so we can discuss the project scope and key parameters in detail? I look forward to working with you. Thank you!

@ahmedy607

Hi, I’ve carefully read and understood the project details. I can modify the existing PCB to integrate the MCP2025/TJA1021 LIN interface, ESP32-ETH01 V1.4 connectors, and the required power delivery and serial connections. I’ll also consider the ESP32-ETH01’s RJ45 placement and overlapping pins to ensure the board fits properly when plugged in, and update the traces/components accordingly. Please share the current Gerbers, BOM, placement/centroid files, and any available schematic/source files so I can review the existing design. You can also check my portfolio for relevant PCB and ESP32 projects. Best regards, Ahmed

@White079

Hi, I have worked with ESP32 boards, Ethernet and PCB design before, so this project is within my experience. I can modify the existing design for the ESP32-ETH01 V1.4 and add the LIN transceiver connection. I will also check the physical position of the ESP32 board, especially the RJ45 area and the overlapping pins you mentioned. For the power section, I can add an LDO or DC/DC converter from the available 12V supply to 5V or 3.3V, depending on the final connection and power requirement of the ESP32-ETH01. Since the original design files are Gerber, BOM and placement files, I would first check how much of the PCB needs to be reconstructed before making the changes. Regards WEN

@electronicsdone

Dear Client, Yes—I’m happy to start with modifying the existing PCB for ESP32-ETH01 v1.4 and LINBUS support. The key is integrating the TJA1021/MCP2025 correctly while preserving power delivery and clearance around the RJ45 connector. PCB Must Innovations brings 30+ years of electronics/PCB experience across ESP32 hardware, LIN interfaces, power regulation, connector integration, reverse-engineering and production PCB modifications. Profile: https://www.freelancer.in/u/electronicsdone I can reconstruct the existing design from the Gerber, placement and BOM files, integrate the LIN transceiver stage, verify the ESP32-ETH01 v1.4 power budget, update the UART interface circuitry, and resolve the connector/mechanical constraints for a clean plug-in fit. The amateur trap is solving the schematic and discovering the Ethernet module physically collides or browns out under load. Haha, RJ45 connectors are not known for negotiating space politely. I’m happy to offer a free consultation first so we can review the existing files and identify the minimum safe changes before reconstruction. One question: do you want the ESP32-ETH01 mounted directly with headers, or can its position/orientation shift slightly to clear the RJ45 overlap? Message me with that answer and I’ll outline the modification and verification path before you commit. You’ll get reliable LIN communication, adequate power and clean mechanical fit. Kind Regards Prat PCB Must Innovations

@ssumitkumar7800

As an experienced electrical engineer and PCB designer, I am equipped with the exact skillset your project demands. My proficiency in PCB design and modification will significantly assist me in effectively integrating the TJA1021/MCP2025 chip into your existing design while ensuring optimal placement considering the RJ45 overlapping with the ESP32's end pins. With my experience handling Gerber files, I can accurately update traces and components necessary for a seamless serial communication between the ESP32-ETH01 v1.4 and the MCP2025. My knowledge and familiarity with both the MCP2025 chip and ESP32-ETH01 v1.4 board will expedite this modification process. I'm particularly excited about helping you leverage an open-source project to replace LG air conditioners' WiFi module with an ESP-based device. This aligns directly with a previous project of mine aimed at removing wireless functionalities and maintaining ethernet compatibility. In addition to my technical competencies, I am renowned for my keen attention to detail which will be instrumental in making sure that every connection, pin, and trace is taken care of while leaving no stone unturned in verifying adequate power delivery from the amended PCB design. Therefore, if you need precision, efficiency, and meticulousness, then look no further, as I have all these qualities to provide you with a top-notch modified PCB design. Let's get started with this incredible project together!