RS-485 Experts in Germany
in minutes from over 15,000 CVs with vetted, available specialistsHire experts who design robust RS-485 links, wire multi-drop fieldbus networks, and troubleshoot noisy serial lines in plants, machines, and building systems. Get fast, precise matching with vetted, available freelancers.
Meet FRATCH Experts in Germany, who have recently used RS-485
Volker Foitzik
Last position:
Technical Lead | Software Architect | Embedded Software Engineer at Hydac
- Development of safety-related embedded software for a mobile machine on a Hydac TTC 2390 controller.
- Implementation in C with consideration of SIL 3 / ASIL D and MISRA-C:2025.
- Implementation of communication via CAN, CANopen, and J1939.
Standards, guidelines and norms: ISO 26262, IEC 61508, MISRA-C:2025
Technologies: C99, Hydac TTC 2390, Infineon TriCore Aurix TC397, Hightec C/C++ Compiler, PC-lint Plus, CAN, CANopen, J1939, MISRA-C:2025
Nazif Küçükkoc
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
Ljubomir Obrenovic
Last position:
Senior Software Test Engineer at Keil KTM GmbH
Temporary employment
- System black-box integration tests (BBIT, IVVQ): Execution of regression, release, acceptance, and compliance tests for safety-critical brake control units in the rail industry
- Software test application & integration: Runtime configuration of software components and libraries, validation of interfaces, configuration dependencies, and component interactions
- Test automation (FEAT framework): Co-development and further development of an automated test framework for test execution, reporting, and result analysis
- Functional safety (SiL4, FuSi): Ensuring compliance with safety requirements, traceability and coverage, as well as standards compliance according to EN50126/28/29
- Test automation for communication components: Configuration and validation of fieldbus (CAN) and Ethernet-based TCMS data communication interfaces (TRDP and CIP)
- Requirements analysis & shift-left (PTC Windchill ALM): Analysis of software and system artifacts to identify gaps, ambiguities, and redundancies early in the SDLC
- Test design & test case development: Derivation of test conditions, coverage strategies, and implementation of data-driven test cases (DDT), including reusable test data fixtures
- CI/CD & automation (Python, PowerShell, Jenkins, SVN): Automation of build, test, and HIL deployment processes as well as integration into CI/CD pipelines
- Test data & configuration management (XML): Maintenance and adaptation of XML test vectors and system configurations with automated integration into test environments
- Non-functional testing: Execution of performance and load tests to assess stability and system behavior
- Agile development & defect management (JIRA, Confluence): Participation in Scrum teams, test coordination, review of test artifacts, as well as defect tracking and root-cause analysis
- Error analysis & debugging (CANoe, CANalyzer): Analysis of errors and message flows across multiple system layers (application to bus)
- Model-based analysis (UML, Enterprise Architect): Specification of SUT/SOW and support for systematic test control
- Process & test documentation: Creation of integration and test documentation according to internal quality and certification requirements
Waqar Ahmed
Last position:
Principal Engineer at Microchip Technology
- Acted as an FPGA Subject Matter Expert with hands-on experience in Microchip Technology Libero SoC and PolarFire FPGA/SoC evaluation platforms.
- Identified a bug in an application note and provided a solution.
- Collaborated with Field Application Engineers (FAEs) to analyze, debug, and resolve customer-reported FPGA issues.
- Worked with internal teams to accelerate SPI flash programming by creating an FPGA design that enabled high-speed communication between JTAG and SPI.
- Characterized PolarFire FPGA temperature TVS sensors from -40°C to 100°C, comparing estimated and measured surface temperatures and analyzing junction-to-surface temperature estimation using the Psi-JT thermal parameter.
Kacper Kowalski
Last position:
Author
Seqnaut and Sycosm (WIP) – Embedded Audio DSP & Synthesis Platform
- Embedded audio DSP framework — synthesizers, effects, drum machines; modular audio graph
- Sequencing: PianoRoll, StepGrid, MasterClock; 8-voice polyphonic synth; CLI + OSC
- Transient Detector — dual-envelope adaptive threshold, guitar attack detection
- Hardware: Teensy 4.1, custom AFE design tapping BOSS GX-100; MIDI FX integration
Label: C++23, C, Python, CMake, FreeRTOS, Teensy 4.1 (ARM Cortex-M7), Teensy Audio (Stoffregen), DaisySP, I2S/SAI, OSC, MIDI
Oleksii Kvasnikov
Last position:
Software developer (freelance) at Sasse Elektronik GmbH
- Built custom Yocto Linux image with Docker support (NXP i.MX 6ULL)
- Developed distributed Python application (web interface, gas/temp control)
- Designed multiple docker containers for production and development
- Wrote documentation per IEC 62304
Sergej Vontobel
Last position:
Software Developer Motor Control (Project "Multi DMR – Motor-Control") at Lorch Schweißtechnik GmbH
- Modification and redesign of the software for a series component
- Review of the software concept and extension of functionality
- Modification of software functions for DC motor control
- Hardware: ARM STM32G474, CAN bus, Lauterbach T32
- Software: Microsoft Visual Studio Code
Daniel Schäftner
Last position:
Embedded Software Engineer at Rawe Electronic GmbH / SCHELL
- Firmware low-level driver development for an advanced water tap with bluetooth on an EFR32BG module from Silicon Labs with Simplicity Studio
Andreas Nolden
Last position:
Open Source Founder at Privatier
- AI-supported source code analysis
- AI image generation for a shirt shop
- AI-supported analysis of connected YouTube channels and commenting users
- AI-supported software prototyping
- Operation of a local AI environment
- 3D printing and scanning: development of a process to repair GfK parts using 3D-printed negative molds
The focus is on practical applications of new technologies, founding an open-source project for a yacht autopilot, as well as yacht refit and motorhome conversion.
Michael Kraft
Last position:
Bytec Medizintechnik
- Developed solution to filter heavily noisy analog sensor data by combining high-speed sampling with digital firmware filtering
- Increased battery life of a battery-powered medical device from about 10 days to about 18 months
- Supported the overall project up to initial clinical tests and TÜV approval
Daniel Carton
Last position:
Founder & Managing Director at BotCraft GmbH
- Building the company with a focus on connectivity for IIoT and Industry 4.0, iRPA/process automation, advanced robotics and smart systems, sensors and services
- Project management and software architecture for IoT gateway development (since 2020) with protocol translation, IT/OT convergence and GRC
- Developing RPA bots for automating and monitoring industrial processes with an agent-based AI approach (since 2020)
- Implementing unsupervised clustering and anomaly detection for time series data in big data streaming pipelines (since 2021)
- Introducing a Docker-based release train for OTA updates with DevSecOps and CI/CD (since 2018)
Mario Drmic
Last position:
Senior Test Engineer at Webasto SE
- Testing control units in the automotive roof systems area (ECU system test)
- Creating and maintaining test specifications for system and integration tests
- Planning and implementing automated tests including documentation of results
- Performing LIN conformance tests and cyber security tests
- Analyzing and evaluating software and hardware issues and coordinating with development teams
- Developing test strategies and test plans to ensure test coverage
Yoav Netzer
Last position:
Freelance Software Architect at Freelance Consultant
- Various small consultations, e.g. concepts and arcitectures.
- Updating my Matlab, Linux, IPv6, Cyber-Security, C++ (up to 23) and Python skills.
Steffen Kappler
Last position:
Freelancer – Software Development at LightnTec GmbH
- Implemented an RGBW function on a microcontroller to drive flexible LED matrix displays in Embedded C
- Implemented various algorithms to calculate a white channel
- Expanded a web interface
Tilmann Spahlinger
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-485
Aggregated from the professional profiles of matched freelancers.
Experience
19 years
Position duration
1.7 years
Positions per freelancer
15
Top business areas
Information Technology, Product Development, Quality Assurance
Top industries
Manufacturing, Information Technology, Automotive
Certification focus areas
Information Technology, Quality Assurance, Production
Bachelor's degree or higher
100%
Master's degree or higher
50%
Doctorate
7%
Certifications per freelancer
3
Most common languages
English, German, Russian
Speak two or more languages
100%
Based on our profile pool as of 30 Aug 2026.
Daily rate distribution
The chart shows how the daily rates of freelancers in this technology in Germany are distributed, based on recent contracts on our platform. Each bar covers a rate range — its height shows how many freelancers charge within that range.
Average rates of experts in Germany using RS-485
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 30 Aug 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
About the technology
RS-485 basics
RS-485 is a physical layer standard for serial communication over twisted pair cable. It is also known as TIA-485 or EIA-485. Specialists use it when devices must talk reliably over longer cable runs and in electrically noisy environments.
Where it is used
RS-485 shows up in industrial control, building automation, metering, access systems, and embedded equipment. Common projects include:
- multi-drop sensor and actuator networks
- serial links between controllers and drives
- Modbus RTU and other fieldbus setups
- retrofit work for legacy plant equipment
What strong specialists do
Good RS-485 professionals know half-duplex and full-duplex wiring, termination, biasing, and grounding. They check baud rate limits, cable length, and bus topology before problems reach production. They also understand how transceivers, isolators, and connectors affect signal quality.
Tooling and stack
RS-485 rarely stands alone. It is usually paired with microcontrollers, PLCs, gateways, USB adapters, protocol analyzers, and firmware for Modbus or custom serial protocols. Strong specialists can read schematics, test with scopes or analyzers, and trace faults across hardware and software.
When companies bring in freelance help
Companies often need outside help when a bus is unstable, a legacy system must be extended, or a new device must join an existing network without breaking it. In Germany, this is common in factory, energy, and automation environments where on-site checks matter. Freelance specialists are useful for audits, migrations, and short implementation phases.
What to look for
- clear experience with RS-485 wiring and termination
- practical debugging of noise, reflections, and bus contention
- protocol knowledge, especially Modbus RTU
- comfort with embedded hardware and field installation
- clean documentation for maintenance teams
Frequently asked questions
Curious about RS-485? Here are the answers that come up again and again.
RS-485 is used for serial communication between devices that need to work over longer cable runs and in harsh electrical environments. It is common in industrial control, meters, access systems, and building automation. Many projects also use it as the transport layer for Modbus RTU.
RS-485 is better suited to multi-drop networks and longer distances than RS-232. Compared with CAN, it is simpler and often used for custom serial protocols or Modbus, while CAN brings a stronger built-in network model. The right choice depends on the device count, wiring, and protocol needs.
A strong RS-485 specialist is useful when a bus is unreliable, a legacy installation needs extension, or new equipment must be added without changing the whole system. They also help when there are grounding, shielding, or termination problems that are hard to isolate. If the project mixes firmware, wiring, and on-site troubleshooting, outside help pays off quickly.
A good RS-485 professional usually also understands embedded hardware, PLCs, serial protocols, and basic signal integrity. Knowledge of Modbus RTU, UARTs, transceivers, isolators, and cable selection is often essential. For field work, practical testing with oscilloscopes or protocol analyzers is a strong plus.
RS-485 remains a solid choice when you need simple, robust serial communication across multiple devices. It is not as feature-rich as Ethernet-based systems, but it is still practical for retrofit projects and deterministic local links. Many teams keep choosing it because the hardware is inexpensive and the wiring model is well understood.
The needed depth depends on the scope of the RS-485 work. A straightforward device connection may only need a specialist who knows wiring, addressing, and basic testing, while a noisy plant network may need deeper experience with grounding, isolation, and protocol debugging. Projects that include firmware or gateway logic need broader systems knowledge.
RS-485 work can be split between remote and on-site tasks. Remote support works well for schematics, firmware review, protocol checks, and fault analysis from logs or captures. On-site time is often needed for cabling, termination, and physical troubleshooting, especially in Germany’s industrial and automation settings.
Look for practical examples, not just theory. A strong RS-485 specialist explains bus topology, termination, biasing, and fault-finding in clear terms and can show how they handled real field issues. Good documentation, careful testing, and awareness of the surrounding protocol matter as much as wiring knowledge.
The average hourly rate of freelancers in Germany who have used RS-485 in their recent projects is 93 €, which corresponds to a daily rate of about 747 € based on an 8-hour working day.
Of the freelancers in Germany who have used RS-485 in their recent projects, 100% hold at least a Bachelor's degree, 50% hold at least a Master's degree, and 7% hold a doctorate.
On average, freelancers in Germany who have used RS-485 in their recent projects have 19 years of professional experience, with a single engagement typically lasting around 1.7 years.
The most common languages among freelancers in Germany who have used RS-485 in their recent projects are English (100%), German (95%), and Russian (16%).
The most common industries among freelancers in Germany who have used RS-485 in their recent projects are Manufacturing (95%), Information Technology (68%), and Automotive (63%).
The most common business areas among freelancers in Germany who have used RS-485 in their recent projects are Information Technology (95%), Product Development (95%), and Quality Assurance (95%).
Main locations of FRATCH Experts, who have recently used RS-485
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 Request a free demo
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Philipp Thomaschewski
FRATCH CEO
