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Radio amateur · builder

I build radio
that does more

Marcin Brzozowski, SP8MB from Świdnik, Poland. I run repeaters, design TETRA base stations and terminals, write radio apps, and build drones and hardware. This is everything in one place.

430431438439MHz
TMO 439.025SHIFT 8 MHzQTH Świdnik · LublinSR8LSW · SR8LST
28+
projects
2
repeaters
430–440 MHz
70 cm band
2
PL · EN
Featured projects

A few things I'm most proud of — the rest live in the projects section.

Radio & TETRA
In progress

TetraSpot

TETRA base station (hotspot)

A homebrew TETRA base station that fits on a desk. The first amateur project in the world to bring a home TETRA base station to full functionality.

What it does
  • Group and individual calls like on a real network
  • Messaging and terminal locations on a map
  • Bridges your radios into the nationwide TetraPoland network
  • Runs on a single small computer
base stationvoicemessagingGPS
Radio & TETRA
In progress

TETRA MS

A TETRA radio without a radio

A complete TETRA radio whose job is taken over by a computer with a radio receiver. The first solution of its kind in the world.

What it does
  • Registers on the network like an ordinary handset
  • Group and private calls plus messaging
  • Sends position reports
  • No factory terminal required
terminalSDRvoicelocation
Radio & TETRA

TLA — Tetra Light Analyzer

TETRA network analyzer in the browser

The whole TETRA network at a glance without installing anything — open a browser and it's all live.

What it does
  • Tracks 64 channels at once — see who's talking to whom
  • Live listening and automatic call recording
  • Signal spectrum and reception quality in real time
  • SDS messages and terminal positions on a map
monitoringrecordingspectrummap
Radio & TETRA
Beta

TetraPoland — Android

A TETRA radio in your phone

Full TETRA radio functionality on an ordinary phone — over cellular or Wi-Fi.

What it does
  • Group and individual calls with a PTT button
  • Works with wireless PTT buttons and headsets
  • Private calls encrypted, resistant to quantum computers
  • Your position shows up on the TetraPoland map
mobilePTTmessagingencryption
Radio & TETRA
Live

Sieć TetraPoland

The Polish TETRA community

A nationwide network and community of TETRA enthusiasts that I co-run.

What it does
  • Calls across the network shown live
  • Real-time GPS map of terminals
  • All our projects in one place
  • An open community of radio amateurs
communitynetworkGPS mapdashboard
Hardware & firmware

MotoComputer

Motorcycle on-board computer

An on-board computer for a BMW motorcycle that gathers data from the bike and shows it on an always-on phone screen.

What it does
  • Ride parameters and sensors in one view on the handlebar
  • Always-on, easy-to-read display
  • Bike data and phone sensors together
motorcycleBMWdashboard