IoT connectivity
Sigfox, LoRa, NB-IoT, LTE-M — and now ambient IoT at Wiliot. From cell-tower planning to battery-free Bluetooth sensors at scale.
Vasco Barreiros
30+ years in telecom and IoT.
Lifelong amateur radio operator.
Builder of small iOS apps.
About
A telecom builder who never stopped tinkering.
I work on ambient IoT at Wiliot — battery-free Bluetooth sensors that turn everyday objects into data sources. Before Wiliot, years across telecom: LPWAN connectivity (Sigfox, LoRa, NB-IoT, LTE-M), data analytics, and program management.
Outside of work, I'm a licensed amateur radio operator — CT1OY — active across HF, VHF, UHF, amateur satellites, and digital modes. The apps below come from the same place: solving practical problems with the tools I have.
What I do
Three threads, one career.
Data & program management
Network strategy, KPIs, and the cross-functional work of getting telecom projects shipped across mobile and fixed operators.
iOS + amateur radio
Four published apps and counting, mostly built around problems I wanted to solve myself — weather, earthquakes, satellites, HF propagation.
On the App Store
Small, focused iOS apps.
HamSat
Satellite tracker for hams.
Live sky-dome visualisation with Doppler-corrected frequencies and real-time arc tracking. Aim Mode overlays satellite positioning on the device compass. AOS alerts via Live Activity and Dynamic Island. Full geostationary support including QO-100. Multi-source TLE from CelesTrak, AMSAT, N2YO, and SatNOGS. Location stays on-device — no accounts, no tracking.
View on App Store ↗
PSKReporter Client
Digital mode propagation map.
Real-time reception reports from FT8, FT4, WSPR, JS8CALL, and CW visualised on an interactive world map. Multiple views: who's hearing you, who you're hearing, or browse by grid square. Band condition indicators, greyline and twilight propagation analysis. Pro adds DXCC tracking with ADIF import, station benchmarking, and MQTT streaming.
View on App Store ↗
GeoQuake
Earthquake activity, at a glance.
Real-time earthquake data on a map you can scan in seconds. Built for people who want to know what's shaking, where, and how strong — without the noise.
View on App Store ↗
GeoPT
Portuguese weather, the way I want it.
IPMA forecast for the next three days. UK Met Office surface analysis updated daily. EUMETSAT satellite imagery, visible and infrared. Weather warnings for Portugal. English and Portuguese.
View on App Store ↗
Contact
Get in touch.
Questions about an app, a project, or just want to say hi? Send a note — I read everything.