Lock and PMS Integration for Hotel P

@markoa7

Hi there, I’ve reviewed the goal to integrate your hotel PMS with the door lock system despite the lack of official API documentation. My approach is to first analyze the lock’s communication behavior from the provided Mifare card dumps and hardware signals, then implement a lightweight middleware (C/C++) that speaks a simple, PMS-friendly interface. The middleware will handle creating new keycards at check-in, extending access, and revoking at checkout, with clear logging and robust restart behavior. I’ll provide concise protocol docs, data formats, and a straightforward deployment guide so your team can maintain it. What PMS platform are you using, and are there any on-premise vs. cloud constraints or security policies I should align with? Best regards, Marko Aleksic

@brayanstiven5

Hi, there, My name is Brayan, an experienced freelance engineer specializing in RFID integration and API development. With a strong background in C++, Arduino, and software engineering, I am well-equipped to handle the integration of your electronic door locks with the Property Management System (PMS). ✅ Leveraging my expertise in RFID technology, I will analyze the communication protocol between the lock system and its hardware to establish a seamless connection. ✅ I will develop a custom software middleware/API that bridges the gap between your PMS and the lock system, enabling keycard automation for check-ins, check-outs, and access management. ✅ Utilizing my C programming skills, I will create a robust interface capable of creating, extending, and revoking keycard access efficiently. ✅ Comprehensive documentation detailing the communication protocol and the integrated solution will be provided for future reference and maintenance. ✅ Rigorous testing will ensure the reliability and security of the integration, guaranteeing a smooth operation for your hotel's keycard management system. I look forward to working with you. Best Regards. Brayan

@juanjosec63

Hello, I’m excited about the opportunity to help you integrate the lock system with your PMS in a clean, reliable way. With experience in low-level protocol work (RFID/MIFARE workflows, serial/network device interfaces, and building stable middleware APIs), I can analyze the lock encoder/controller communication in a controlled, authorized environment, document the protocol clearly, and implement a secure service that supports the exact lifecycle you need: issue keys at check-in, extend access, and revoke at check-out. I’ll keep security and auditability front-and-center (no “card cloning” shortcuts), add robust logging and error handling, and deliver a test plan plus repeatable integration steps so your team can operate and maintain it confidently. You can expect clear communication, fast turnaround, and a production-ready interface that fits seamlessly into your PMS workflow. Best regards, Juan

@mobiwebsolutions

✋ Hi There!!! ✋ The Goal of the project:- BUILD A RELIABLE LOCK AND PMS INTEGRATION THAT AUTOMATES HOTEL KEYCARD MANAGEMENT WITHOUT OFFICIAL VENDOR APIS. I carefully reviewed the full requirement and understand that you need reverse engineering of a proprietary electronic lock system using Mifare Classic cards, protocol analysis from provided card dumps, and a stable middleware layer to connect your PMS for automated check in, extension, and check out workflows. I am the best fit for this project because I have hands on experience working with low level hardware communication, RFID systems, and custom integrations where documentation is unavailable. First, analyze and document the lock communication protocol using provided master and guest card dumps. Second, develop a secure middleware API in C or C++ to handle key creation, extension, and revocation from the PMS. Third, fully test the integration for reliability and provide clear technical documentation. I provide database handling if required, API development, thorough testing and QA, documentation, and full source code delivery at project completion. I bring 9+ years experience as a full stack developer and have already completed RFID based access control, hardware reverse engineering, and custom hotel system integrations. Looking forward to chat with you for make a deal Best Regards Elisha Mariam!

@rbtech1984

Hello There!!! ⚜⭐⭐⭐⭐⚜(( HOTEL ELECTRONIC LOCK AND PMS INTEGRATION ))⚜⭐⭐⭐⭐⚜ ( Integrate electronic door locks with PMS for automated keycard management ) Integrating a hotel’s electronic locks with a PMS without existing API documentation is a challenging but rewarding task. Your need for automated keycard creation, extension, and revocation calls for a reliable custom interface that ensures seamless guest access. I have strong experience in C/C++ programming, RFID systems, and embedded device communication, along with developing secure middleware for hardware integration. I can analyze the lock protocol, build a stable API, and provide thorough documentation. Key features: protocol analysis for Mifare cards, middleware/API connecting PMS to locks, and automated access control functions with reliable testing. I would be glad to help you automate your key management and ensure smooth, secure hotel operations. Let’s discuss the access flow and testing strategy. Warm Regards, Farhin B.

@markupdudes

Hi, I've carefully reviewed your project requirements for integrating your hotel's electronic door locks with your Property Management System despite the absence of an official API or documentation. With extensive experience in software development and RFID systems, along with strong skills in C programming and protocol analysis, I am confident I can reverse engineer the lock communication protocol and develop a robust custom middleware to automate your keycard management seamlessly. I will start by analyzing the provided Mifare card dumps to understand the communication patterns, then build and test the interface to support creating, extending, and revoking access. Clear documentation will be delivered to ensure your team can maintain the solution reliably. I propose to complete this integration within 15 days, including thorough testing to guarantee stability and security. Could you specify which PMS software you are currently using to ensure compatibility with the integration? Best regards,

@yaroslavmark

✅Okay, I got what you want exactly. I am a firmware and embedded systems engineer with over 10 years of experience, providing RFID protocol analysis, MIFARE Classic card handling, low-level C/C++ development, and custom middleware/API integration. In my opinion, the right approach here is to reverse-engineer the card memory structure and reader communication flow, then abstract it into a clean middleware layer your PMS can reliably talk to. This avoids lock vendor dependency and gives you full control over key lifecycle automation. This project is very similar to my previous works. I’ve previously decoded proprietary MIFARE Classic–based access systems by analyzing sector keys, access bits, and value blocks, then built a bridge service that handled card issuance, extension, and revocation across 200+ rooms. I also implemented test tools to validate card state transitions and prevent desynchronization issues during checkout. ✅ So, I will divide your project like following: ⚡ Protocol and card memory analysis using provided dumps ⚡ Definition of keycard logic (check-in, extend, revoke) and security rules ⚡ Development of a lightweight middleware/API for PMS integration ⚡ End-to-end testing with real cards and lock hardware ⚡ Clear technical documentation for future maintenance Via private chatting or meeting, I will provide the creative idea and good tech solution for your project and I want to discuss about the budget and timeline in detail. Best regards. Yaroslav

@strdmgrblr

I work on projects where we help clients reach their goals or improve their online presence by building seamless, integrated technology solutions that simplify daily operations. We’ve developed custom software for hospitality clients, connecting hardware and management systems to automate workflows efficiently and securely. I bring strong off-platform experience in reverse engineering protocols and creating user-friendly, automated middleware. Understanding your need to analyze lock communication and build an interface for card management with clean, reliable functions is key. My skills include protocol analysis, software development, system integration, and thorough testing. We can chat more about this challenge soon — I promise I’m less mysterious than your Mifare cards. Let’s have a chat, Alicia

@thomasb726

⭐ If you award me, your smile shows up ⭐ Hi , Your project immediately stood out to me—it closely matches work I’ve completed successfully in the recent past. The core challenges, structure, and technical requirements are very familiar, with only a few unique elements that align perfectly with my expertise. This is great news for you: it allows me to skip the usual ramp-up time, avoid trial-and-error, and deliver clean, high-quality results quickly and confidently. I bring hands-on experience with Documentation, Certified Ethical Hacking, Software Engineering, C++ Programming, RFID (Radio-frequency identification), Software Development, C Programming, Arduino, API Development and Testing / QA, along with proven workflows and best practices refined through multiple similar projects. You can view a directly relevant example in my portfolio here: https://www.freelancer.com/u/thomasb726 I’d be happy to discuss your specific goals in more detail and share tailored ideas based on what has worked best in comparable scenarios. Why clients choose—and continue working with—me: • Clear, proactive communication so you always know where the project stands • Strong respect for your deadlines, budget, and business reputation • Responsive, approachable, and focused on a smooth, stress-free process • Reliable post-delivery support that often leads to long-term partnerships If you’re looking for precise execution, high-quality results, and a dependable long-term partner, I’d love to con

@msaadarshadkhan

Hi there, I am ready to start Lock and PMS Integration for Hotel -- 2 . Last time, I did the same project by just… doing the work. No corporate theater, no 47 meetings about meetings. I’m annoyingly good at details, I hate wasting time, and I actually want to build something here,,not just collect a paycheck. You can check similar projects here: https://www.freelancer.com/u/msaadarshadkhan If you’re tired of cover letters that feel like Mad Libs, hit reply. Coffee’s on me.

@chiragardeshna

Hi there, I am a strong fit because I have integrated proprietary hotel hardware where no official API or documentation existed. I have experience reverse-engineering MIFARE Classic card structures and building middleware that bridges PMS systems with electronic lock controllers. I work with low-level protocol analysis, card dumps, secure key management, and API services that expose clean check-in, extend, and revoke flows. I reduce risk by isolating the reverse-engineered protocol in a dedicated service, documenting every command, and validating flows against real lock hardware. I am available to start immediately and can proceed once the card dumps and PMS details are shared. Regards Chirag

@jeric5g

Hi there, I’ve reviewed the scope for integrating the hotel door locks with your PMS. Given no API docs, I’d start by studying the lock’s hardware handshake with a test rig, then implement a lean C/C++ middleware that abstracts the card commands (issue, extend, revoke) and exposes a simple REST/IPC API for your PMS. I’d target a small, well-documented module compatible with your existing stack, using Arduino-friendly components for the hardware layer and robust logging for QA. Documentation would cover the protocol, data formats, and deployment steps, with test cases that cover common guest flows. 'What is your preferred PMS (vendor) and any constraints on hosting the middleware (on-prem vs. cloud) to plan the deployment approach?' Best regards, Jeric Gonzales

@osamak74

Hello, I fully understand your requirement to integrate your electronic door locks with the Property Management System (PMS). Your goal of automating keycard management is crucial for enhancing guest experience and operational efficiency. In my previous roles, I've successfully developed custom integrations for various hotel management systems, ensuring seamless communication between hardware and software solutions, which led to greater automation and reduced operational errors. ✅ My Plan: - Analyze the communication protocol of your existing lock system. - Develop a middleware/API to link the PMS with your lock system effectively. - Implement functions to create, extend, and revoke keycard access as needed. - Ensure thorough testing of the integration for reliability and performance. - Provide comprehensive documentation for the protocol and solution. Could you clarify if there are specific test scenarios or outcomes you expect from this integration? Best regards, Osama Khan

@jonhw5

Hello, thanks for posting this project. I've read your requirements carefully and this challenge aligns well with my expertise. I have hands-on experience analyzing proprietary communication protocols through hardware/software sniffing, and I am adept at developing middleware to bridge systems without public APIs. I understand the security and reliability needed for keycard management in a hotel context. I have successfully reverse-engineered device communications (including Mifare Classic cards) and created robust integrations for custom hardware and property management systems. My approach includes precise protocol analysis, secure middleware/API design, and thorough documentation, ensuring both technical clarity and operational reliability for your staff. Could you share more about the make/model of your lock hardware and current PMS, and what development/IT environment you prefer for the middleware deployment? Looking forward to hearing from you. Warm regards, Vitalii.

@melissap68

This is exactly the kind of work I enjoy doing — projects like this combine precision and creativity, and I make sure both show through in every detail. With experience in analyzing communication protocols and developing custom software interfaces for seamless integration, I am well-equipped to undertake this task. I excel in creating user-friendly solutions that automate keycard management efficiently. I consistently deliver high-quality results, maintain clear communication, and ensure a smooth process throughout. I'm happy to offer insight even if you don't decide to hire me. Kind Regards, Melissa Pringle.

@rohaansheikh90

Hello, I can do the work as I have experience in analyzing communication protocols and developing custom interfaces for similar projects. I recently completed a project involving integrating a different lock system with a PMS, delivering efficient results. I am confident in my ability to determine the communication protocol, develop the necessary software, and provide detailed documentation for seamless integration. Please start the chat so we can discuss any specific requirements and begin working on this project promptly. Thanks, Rohaan Sheikh

@WishingBell

Hello, I’ve read your brief and I’m confident I can deliver a robust PMS-to-lock integration even without vendor docs. With the Mifare master/guest/configuration dumps you’ll provide, I’ll reverse-engineer the communication protocol, design and implement a C/C++/Arduino-capable middleware API that your PMS can call to create, extend, and revoke keycards, and deliver comprehensive protocol documentation and a test suite to validate reliability. I bring practical hands-on experience in RFID systems, embedded development, API engineering, and QA, and I also use LLMs and Transformer tools for efficient binary-log parsing, classification and vector-search-assisted analysis to speed protocol discovery. I suggest a short discovery phase followed by implementation, testing and delivery within the proposed timeline. Can you provide the lock model, a representative set of the Mifare card dumps, and access to a test reader or lock for live captures? Thanks, Andrew

@cindyviorinar

Hi, I’ve read your Lock and PMS Integration brief and can build a secure middleware to bridge your PMS and the electronic locks even without vendor API. I’m an ASP.NET Core/C# developer experienced in building secure REST APIs, clean layered backend logic and scalable web apps. I’ve also performed protocol reverse-engineering and worked with MIFARE dumps using C/C++, Arduino and low-level RFID tooling, so I’ll analyze the provided master/guest/config dumps, determine the lock protocol, and implement a .NET Core service to create, extend and revoke keycards. I will deliver clear protocol documentation and run end-to-end tests to ensure reliability. I can provide an initial integration plan within a few days. Can you share the MIFARE dump files and the exact lock model(s) so I can begin protocol analysis and scope hardware access requirements? Sincerely, Cindy Viorina

@julianm260

Hello, I’m a backend and embedded systems developer with 8+ years of experience building custom integrations between proprietary hardware and management software, and I’ve carefully reviewed your requirement to connect electronic locks with your PMS without vendor API access. I’ve completed 9 hardware reverse-engineering and protocol analysis projects, including 6 RFID/Mifare-based access systems, where I decoded communication flows and built stable middleware for real-world deployment. For your setup, I would analyze the provided Mifare master, guest, and configuration card dumps, identify the authentication and data structure patterns, and implement a secure middleware API that supports keycard creation, extension, and revocation aligned with PMS events. My previous integrations achieved >99.9% command reliability and typical response times under 300 ms between PMS request and lock authorization. I’ve developed 15+ microcontroller and embedded communication solutions using C/C++ and Arduino-compatible environments, with full protocol documentation and QA validation procedures. You will receive clean, well-documented source code, protocol documentation, and tested deployment instructions to ensure long-term maintainability. I’d be glad to confirm whether your PMS exposes REST, socket, or database triggers for the integration layer.