RS-232 Experts in Germany
matched in minutes with the power of AIHire experts who configure serial communication interfaces, integrate legacy industrial hardware, and debug low-level protocols, quickly matched through AI from a network of vetted, available professionals.
Meet FRATCH Experts in Germany, who have recently used RS-232
Peter V.
Last position:
IT Administrator at SEAT Deutschland
- Creating concepts and architecture for domain integration (SEAT into the VW structure)
- Domain trusts and administration
- Operation and administration of Windows 2022/ 2025 servers and domains
- Domain restructuring
- GPO and SG editing and migration
- DNS restructuring and migration
Technologies: Windows 2022, Active Directory, ADFS, AD Azure Connect, DHCP, DNS, GPO, VMWare vSphere, Hyper-V, Powershell, Jira, MS Office 365,), SCCM, VSAN Fileservices, Approximately 800 servers, 400 users
Giuseppe A.
Last position:
Embedded Software Development at Inheco
- AI Integration (LLM & RAG): Designed and built an internal intelligent RAG system (Retrieval-Augmented Generation) based on LLMs, n8n, and vector data to automatically analyze technical documents and error logs.
- Design & Implementation: Designed a robust RS-232/UART communication interface for an SBC-based embedded device used to control medical shaker systems.
- Architecture & Protocol Design: Built a highly maintainable software structure (OOP, SOLID) and defined resilient, hardware-level communication protocols, including multithreading and advanced error handling.
- Quality Assurance & DevOps: Automated testing with xUnit, ran integration tests directly on the hardware target, and maintained technical documentation to strict medical technology standards via Azure DevOps.
Label: C#, .NET, LLMs, RAG, n8n, RS-232, UART, Multithreading, async/await, xUnit, gRPC/protobuf, Blazor, MudBlazor, EF Core, Visual Studio 2026, Azure DevOps
Nazif K.
Last position:
Self Employed at Self Employed
Providing services to cover the complete electronic product design process.
- Requirement validation
- Creating / re-writing / breaking down requirements
- Requirement analysis and functional partitioning
- Component selection and risk assessment
- Component library management
- Schematics design
- Safety and reliability assessment
- HDI PCB design
- Design review against requirements
- Readiness for manufacturing review
- Readiness for testing review
- Readiness for verification review
High Power Density BLDC Driver Module with MCU as controller:
- PCB module with heatsink
- L47mm x W36mm x H19mm compact sizes
- Nominal input voltage: 48V
- Sinusoidal continuous RMS current: 50A
- STO, Digital input and outputs
- Analog signal inputs
- CANBUS interface
- RS232/RS485 interface
- Multilayer FR4 design (No aluminum PCB)
Integrated Mission Computer & Smart 5kW PDU
- Featuring 3 different current limits, in total 63 power outputs
- Featuring programmable current amplitude and on-time, in total 84 CC power outputs.
- Ethernet, CANBUS, MIL-BUS, RS485 communication interfaces
- In total 120 Open-Short, Open-GND, 28V-GND types discrete I/O interfaces
- BIT and CIT solutions to monitor output voltage, current and board temperature
Hendrik W.
Last position:
Software Test and Maintenance Support at Anton Paar ProveTec GmbH
- Adding/creating test specifications
- Performing regression tests
- Performing release tests
- Analyzing Jira tickets
- Identifying software defects and fixing them with C#
Tamás N.
Last position:
Embedded MISRA C Developer at DEKRA Arbeit GmbH
Task: Test tool development for Smart-Home IoT-based heating control Test tool development for Smart-Home HVAC heating and ventilation. Eliminating memory leaks in C/C++ within the CAN Analyzer application. Reviewing Python and Tcl/Tk code. Reviewing C-based simulator code for BOSCH Home Comfort cascade heating control using Visual Studio Code and Conan/Conda. Reviewing Delphi application: conversion to 64-bit. Reviewing PyQt6 user interface. SiL testing of domestic water heater control for memory leaks. Stability testing and continuous operation. Migration to Windows 11 24H2. Developing device connectivity with WinSock2 (WSAAPI, recv, send, select) for EMS/CAN IoT communication with C. Testing with virtual machines and Server Manager. Writing reports about the test cases. Logging with the RoboTT framework. Creating test procedure documentation with Docupedia. Bare-metal programming of embedded STM32 Cortex-M and simulation with Renode.io. In-depth familiarization with the SEGGER EmbOS firmware framework and its related system calls. Reviewing MATLAB/Sinumerik .m program files. Implementing redesigned OS schedulers in SEGGER EmbOS.Technologies: Embarcadero RAD Studio 10.2, Visual Studio Code, Sourcetree, Conan, Cmake, Conda, EmbOS, PyQt6, Qt6, Delphi VCL 32-bit, CAN, EMS, Powershell, MingW64, STM32 ARM-Cortex-M4F Renode.io, Windows Server 2022 Standard, RoboTT, IoT
André H.
Last position:
Linux IT Admin at ReiserST
- Development and maintenance of IT architectures with embedded Linux systems.
- Designing, implementing, and optimizing backend applications and script-based solutions.
- Analyzing and resolving issues, including troubleshooting and user support.
- Developing and implementing security concepts for cloud solutions.
- Administering networks (DHCP, DNS, NTP, VPN).
- Technologies: Linux, PowerShell, Bash, Python, Ansible, Kubernetes, GitLab CI.
- Methods: Kanban.
Paul P.
Last position:
Independent Consultant – Industry/ Embedded/ IoT at Self-employed
Consulting and support in the areas of sales/business/technology/development/marketing:
- Sales, Key Account Management
- Business Development, business/corporate development
- Partner management
- Program/project management
- Product management & marketing
- Technical marketing, content marketing
- New business, innovation and technologies
Until July 2021 active as advisor and consultant for Mixed Mode in the areas of Key Account Management, Project Management and Business Development.
From Q3/2021 successful delivery of various customer projects in the area of Business Development, corporate development, consulting, coaching, technical content management, sales and marketing:
- EMS service provider and PCB test house, inspection systems: revision of company portfolio and presentation. Integration of specialized distribution for optical inspection systems from Japan: content management, marketing, communication, web, sales automation, lead generation
- Full service marketing agency – technology marketing for industry: expansion of the existing B2B and B2C marketing portfolio with industrial and technology topics: content management, presentation and focus on "technical marketing", web, target market and customer analysis, lead automation, consulting
- Software product manufacturer & software development in the field of security for Embedded & IoT: company alignment and portfolio definition for an IoT and Embedded Security company with a SaaS solution for IoT device management: building a partner network to offer complete Embedded/IoT security solutions, technical content, company alignment and portfolio definition, strategy & planning, target market and customer analysis, product marketing/USPs for the security device management tool "IoT-Suite", standards and regulations for cyber resilience (e.g. CRA, NIS2, RED), web content, SEO, management of marketing and sales agencies, CRM, sales, presentations, trade fairs, congresses, building company webinars & events
- Software engineering service provider/system house for IoT, Embedded, web, mobile and desktop applications: business development, content creation, customer acquisition and sales
- Manufacturer of memory products with security features as an add-on: memory products in standard form factors (SD, CF, SSD...) are extended with security modules such as HSM, TPM or secure elements and thus offer users secure data storage, transfer and access. Also interesting as an upgrade or retrofit solution to meet the coming new regulations and requirements regarding cybersecurity such as CRA, RED and NIS2. Business & New Business Development for the area "Embedded IoT Solutions & Security", sales & marketing. Expansion of the pure semiconductor business to include security solutions and services. Interface between management, marketing, sales and product management. Building business partners, technology partners, system integrators and resellers from the Embedded, IoT, OT and IT environment. Creating reference designs/demos/lighthouse cases and proof of concepts for cross- and reference selling. Co-marketing with security partners. Technical content creation for web, sales and marketing, webinars, social media etc. Networking, participation in trade fairs, congresses and events. Lead generation, qualification, follow-up and conversion to customer. Product definition, USPs, features. Analysis of competitors, market positioning, target markets - strategy, concept and measures - go to market.
- Marketing agency group with sales and management consulting: consulting for companies on restructuring, market analysis and market entry, go-to-market concepts, customer acquisition and expansion, new customer generation, lead generation and management, concepts and execution of campaigns (web, mail, social media, phone outreach in person or with AI voice assistant, webinars...). Processing and managing customer product data for PIM product information and DAM data asset management systems. Focus on customers in the industrial and technology environment with products and services that need explanation.
Luca P.
Last position:
ERP Program Manager at Fiserv
The customer is undergoing a comprehensive transformation. All SAP ECC landscapes worldwide are being migrated to SAP S/4HANA, with the goal of introducing a standard template worldwide.
The program also includes the “RISE with SAP” migration and modernization program, which may involve migrating the landscapes of selected country installations to the SAP Private Cloud.
On the stakeholder side, the program reporting line extends to the company’s executive board and that of the implementation partner.
Fiserv Germany’s ERP landscape currently includes several non-standard SAP tools and applications that extend the functionality of the ECC environment and can often be integrated into downstream systems. As part of the transition to SAP S/4HANA, it is essential to assess the core functionality, integration points and future viability of these applications in order to determine their alignment with the target architecture.
The focus of the work is on providing expert advice and assessment to define the scope, strategy and roadmap for transitioning Fiserv Germany’s SAP ECC system to SAP S/4HANA.
The recommended best practices from SAP are followed and a structured approach is used to ensure a smooth transition with minimal disruption while maximizing business value.
This assessment forms the basis for a successful SAP S/4HANA transformation and ensures alignment with industry best practices, regulatory compliance and future scalability.
Migration Strategy Definition – assessment of available transition approaches based on business objectives, technical feasibility and SAP Best Practices.
Technical Readiness Assessment – conducting a system analysis to assess compatibility, custom code impact, data volume management, integration points and infrastructure readiness for SAP S/4HANA.
Business Process Impact Analysis – reviewing the latest business process documentation to define the scope and effort required to implement the necessary functions in SAP S/4HANA and to identify opportunities for process optimization.
Roadmap for Non-SAP Systems and Applications – assessment of third-party and legacy applications regarding their integration with SAP S/4HANA and recommendation of consolidation, migration or replacement strategies.
Deployment & Implementation Planning – defining a phased approach for implementation, including project schedules, risk mitigation strategies and key milestones aligned with business priorities.
This transformation takes place in phases: the Discovery phase leads to the Explore phase, which is followed by the Design phase and finally implementation.
Program management
Change management
Requirements management
Transition management
Stakeholder management
Risk management
Comprehensive coordination
Andreas W.
Last position:
Self-employed Software Developer at amw-software.net
Uwe S.
Last position:
Software Developer Embedded Systems at Self-employed
Daniel P.
Last position:
Freelance specialist in industrial automation technology at dPSolutions
- Self-employed PLC and software specialist focusing on automation and special-purpose machinery
- Programming, modernization, expansion and optimization of production systems, focusing on increased efficiency, data transparency and system integration
- PLC programming and safety with Siemens S7 Classic/TIA Portal, Beckhoff TwinCAT 2/3 and CoDeSys
- Development of high-level language software and database applications (.NET / C#, C++, Visual Basic .NET, Borland/Embarcadero C++)
- Development of custom software solutions for industrial automation, including embedded systems (Raspberry Pi, Arduino, NodeMCU, ESP8266)
- Integration of external systems such as reading devices, printers, scales, scanners and cameras, as well as various bus systems (Ethernet, Profinet, Profibus, EtherCAT, CAN bus, RS232, TCP/IP)
- Creation of visualizations and HMI applications with Siemens WinCC flexible, Beckhoff HMI and .NET frontends
- Planning, development and integration of machine vision solutions (Keyence, Cognex, AVS Alfavision, camera systems) in PLC and PC environments
- Design and implementation of process data collection systems and traceability solutions (100% traceability) based on Microsoft SQL Server (Compact, Express, Server), including stored procedures and direct PLC-SQL communication
- Creation of software and PLC concepts, standard function blocks and project libraries for PLC and high-level language projects
- Planning and programming of conveyor, inspection, assembly, packaging and grinding systems in industries such as automotive, chemical, food, electronics, machinery and systems engineering
- Conducting workshops and training on Siemens TIA Portal, STEP7 Classic, Beckhoff TwinCAT (including TwinSAFE), as well as topics such as architectures, safety, database integration and documentation
- Creation of technical documentation, manuals, training materials and class documentation with Microsoft Office and Doxygen
- Project management tasks from requirements analysis through planning, concept development and supplier coordination to commissioning, production support and customer support
Roland R.
Last position:
Support in Ongoing Project at Automotive Supplier
- closing the safety case
- creation of meaningful traceability matrices and targeted test expansion
- transferring requirements into other database systems
- structuring the requirements, assessing their completeness, and setting up new test cases based on use-case–based test strategies and the results of internal traceability matrices
- partial automation of tasks within a requirement assessment tool
- tools and languages: MS Teams, reqIF, Enterprise Architect, Codebeamer, proprietary tools for creating and evaluating traceability matrices (approx. 1000 x 1000)
André G.
Last position:
IT Consulting Project Management / Engineering Subproject Management at T-Systems (on assignment for government agencies)
- Projects for federal networks (NdB).
- CR management, EoL change requests, design and documentation according to ITSCM.
- Data center planning.
- Project management and engineering subproject management.
- Software development for virtual server environments according to BSI.
Jiri S.
Last position:
Quality Manager/Test Management at Noriba GmbH
- Test concept creation
- Creation of test processes
- Coordination of TC development: stress tests, functional tests, performance tests, high data rate tests, integration tests, etc.
- HW testing: FPGA, RF
- Test automation and regression tests
- Ensuring 24/7 operation of the test system
- Analysis & reporting
- Regular coordination of the test team, meetings with other stakeholders
- Communication and coordination with stakeholders and the project manager
Tilmann S.
Last position:
Technical Expert, Software Architect at Rolls Royce Power Systems / MTU
- Created concepts and architecture for ECU diagnostics over CAN-Bus using UDS, PDX, ODX and safety paradigms
- Designed system deployment for EMS and documented using UML, Draw.io, MS Word, MS Visio and Confluence
- Developed process flows for development, planning, logistics, test & diagnostics in Scrum with Jira and MS Planner
- Communicated across multiple customer teams, conducted knowledge transfer
Discover over 15,000 top freelancers
Statistics of experts using RS-232
Aggregated from the professional profiles of matched freelancers.
Experience
27 years
Position duration
3.9 years
Positions per freelancer
19
Top business areas
Information Technology, Product Development, Quality Assurance
Top industries
Information Technology, Manufacturing, Automotive
Certification focus areas
Information Technology, Product Development, Quality Assurance
Bachelor's degree or higher
81%
Master's degree or higher
53%
Doctorate
13%
Certifications per freelancer
2
Most common languages
German, English, French
Speak two or more languages
100%
Based on our profile pool as of 29 Oct 2026.
Daily rate distribution
The chart shows how the daily rates of experts in this technology in Germany are distributed, based on recent contracts on our platform. Each bar covers a rate range — its height shows the share of experts charging within that range.
Average rates of experts in Germany using RS-232
Rates are based on recent contracts and do not include FRATCH margin.
The average daily rate is the mean of all daily rates from recent contracts of comparable freelancers on our platform.
The median daily rate is the middle value of all daily rates — half of comparable freelancers charge less, half charge more. Unlike the average, it is barely affected by outliers.
Calculated based on our freelancers’ daily rates as of 29 Oct 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
RS-232 experts industry focus
See which industries our matched freelancers work in most often — every figure is calculated live from the freelancers on FRATCH.
- Information Technology (85%)
- Manufacturing (82%)
- Automotive (69%)
- Healthcare (49%)
- Telecommunication (49%)
- Energy (44%)
- Education (36%)
- Professional Services (33%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
Point-to-point serial communication standard
RS-232, formally known as EIA/TIA-232, defines the electrical characteristics and timing of signals for point-to-point serial data exchange. It connects data terminal equipment to data circuit-terminating equipment over standard serial lines. The standard remains essential for direct machine interfaces, serial consoles, and embedded diagnostics.
Typical applications and integration scenarios
- Interfacing legacy programmable logic controllers with industrial PCs
- Communicating with laboratory scales, barcode scanners, and measurement gear
- Providing low-level maintenance and bootloader consoles on embedded boards
- Bridging physical COM ports to modern Ethernet or USB systems
Hardware protocols and testing tools
Working with serial communication requires deep knowledge of signal lines such as TXD, RXD, RTS, and CTS, along with DB9 and DB25 pinouts. Specialists use digital storage oscilloscopes, hardware bus sniffers, and terminal emulators like minicom or PuTTY. They also handle UART integration, level shifters such as the MAX232, and custom cabling.
Industrial footprint in Germany
German manufacturing, automotive testing, and automation infrastructure rely heavily on long-lifecycle machinery. Production facilities in Baden-Wuerttemberg, Bavaria, and North Rhine-Westphalia continuously require integration between vintage machine tools and modern supervisory systems. This sustains a strong demand for low-level serial communication know-how on factory floors.
When teams need external serial experts
Companies hire external professionals when retrofitting production machinery, solving baud rate timing mismatches, or developing custom drivers for proprietary hardware. Freelance specialists resolve hardware handshaking issues, buffer overruns, and ground loop interference without requiring internal teams to divert focus from higher-level software architecture.
Hallmarks of experienced serial specialists
Senior professionals diagnose physical layer noise, parity errors, and signal degradation over long cable runs quickly. They write robust low-level drivers in C or C++, implement deterministic protocol state machines, and handle conversions to RS-485 or industrial Ethernet reliably across mixed operating environments.
Frequently asked questions
Need clarity? These are the questions we hear most often about RS-232.
Companies engage an RS-232 specialist to interface legacy machinery with modern control systems, develop custom device drivers, and troubleshoot communication failures. These professionals configure UART registers, establish reliable hardware flow control, and verify signal integrity across serial connections.
While RS-232 is strictly a single-ended point-to-point interface intended for short distances, RS-485 uses differential signaling to support multidrop networks across much longer cable runs. RS-485 offers higher noise immunity in harsh factory settings, whereas serial EIA-232 lines remain standard for dedicated diagnostic ports and direct peripheral attachments.
A capable EIA/TIA-232 specialist needs a solid foundation in embedded C, Linux serial port programming, and microcontroller architectures. They should also be skilled with digital oscilloscopes, protocol analyzers, and alternative buses such as CAN, SPI, and Modbus RTU.
Protocol parser development, simulation, and software driver design can proceed remotely, but physical debugging usually requires access to real hardware. For commissioning plants or resolving grounding issues across industrial sites in Germany, companies often prefer a hybrid setup with scheduled on-site integration days.
Embedded documentation and source code are typically maintained in English, but on-site work on German production floors often benefits from German language skills. Being able to communicate with local plant technicians and facility electricians in German accelerates hardware setup and diagnostics.
Evaluate candidates by their practical experience with electrical signal debugging, hardware flow control mechanisms, and edge-case handling such as framing errors. A top-tier RS-232 professional should explain how they resolve voltage level shifts, ground offsets, and buffer overruns in real-time environments.
Many mission-critical machines in heavy industry, medical technology, and laboratory environments operate reliably for decades on legacy interfaces. Replacing functional capital equipment is cost-prohibitive, so businesses rely on serial port connectivity combined with edge gateways to feed data into modern cloud platforms.
The classic standard limits RS-232 cables based on total capacitance, typically translating to around fifteen meters at standard speeds like 19,200 baud. Skilled specialists use low-capacitance shielded cables or line drivers to extend range, but they recommend converting to differential standards when distances grow significantly.
The average hourly rate of freelancers in Germany who have used RS-232 in their recent projects is 92 €, which corresponds to a daily rate of about 737 € based on an 8-hour working day.
Of the freelancers in Germany who have used RS-232 in their recent projects, 81% hold at least a Bachelor's degree, 53% hold at least a Master's degree, and 13% hold a doctorate.
On average, freelancers in Germany who have used RS-232 in their recent projects have 27 years of professional experience, with a single engagement typically lasting around 3.9 years.
The most common languages among freelancers in Germany who have used RS-232 in their recent projects are German (100%), English (100%), and French (21%).
The most common industries among freelancers in Germany who have used RS-232 in their recent projects are Information Technology (85%), Manufacturing (82%), and Automotive (69%).
The most common business areas among freelancers in Germany who have used RS-232 in their recent projects are Information Technology (100%), Product Development (100%), and Quality Assurance (90%).
Main locations of FRATCH Experts, who have recently used RS-232
Our freelancers and interim experts are at home across the DACH region — available on-site in the major business hubs or fully remote. Choose a location to discover matched specialists, local market insights and up-to-date availability.
Berlin Hamburg Munich Cologne Frankfurt Stuttgart Dusseldorf Leipzig Dortmund Essen Bremen Dresden Hanover Nuremberg 
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