Our motto
European Electronics Engineering. Global Reach.
A while ago, we were building firmware for our customer and hit the same wall as always: driver limitations, dealing with crashes after Updates and especially being locked into a single application trying to read a standard RS-485 serial bus.
It was frustrating enough that we decided to stop complaining and just engineer a better way.
Now, I’m incredibly proud to introduce NECOSIN Systems. We are a Czech-based electronics startup building industrial-grade connectivity tools that actually make sense for modern workflows.
Our first lineup is the EthLinx™ series.
We stripped out the proprietary drivers and replaced them with standard USB networking (RNDIS/CDC-ECM). You plug it in, configure it via a web browser, and access your serial data using TCP sockets or an HTTP REST API. It allows up to 4 concurrent clients to access the bus simultaneously — meaning you can finally run your control software and log the raw data at the exact same time.
On top of that…
We design our products from scratch, we bring in our unique signature
We design, code, test and assembly at our site in Czechia
We listen to our customers and offer modern, out of box solutions
We always focus on design & build quality, avoiding extreme cost cutting

Martin Ondrak
CEO, NECOSIN Systems s.r.o.
About Company
We provide modern, out of box solutions
Designing modern electronics that helps transforming the industry. We aim to solve everyday issues for any industry, testers and manufacturers.
- Innovative ways of problem solving
- Modern European company
- Pro-customer approach and trust building
- Own store for easy stock items purchase, worldwide shipping available
- We focus on English and Spanish speakers
Did you know?
The company name is an anagram of its birthplace. Konesin, Trebic District, Czechia.