P.01 / EnergyEntry 001
FutureGrid
A smart energy platform built from scratch - from embedded devices at the edge to the cloud that balances them.
- Go
- Python
- MQTT
- Embedded
Systems,signals &security.
The author
- Role
- Engineering Leader
- Fields
- Infra / Security / AI
- Also
- Embedded, IoT, SDR
- Since
- 15+ yrs in production
- Team
- Senior specialists
Fig. 0b / 868 MHzLive sketch
Lab notebook of an engineering leader working across infrastructure, security, AI and embedded systems - who also listens to the 868 MHz band for fun. Every entry is something that actually ran, broke, or got fixed.
● Featured series05 parts / 29.06 - 07.07.2026
Software-Defined Radio for SIGINT
From one RTL-SDR stream to a full receive chain: a wideband hub, smart water meters, LoRa below the noise floor, a spectrum survey and the hardware that mattered.
- Part 01No. 012
Listening to an Entire 868 MHz Band at Once: Building an SDR Hub
29.06.2026 / 5 min - Part 02No. 013
Reading My Water Meter With a $30 SDR - and the Factory Key Nobody Changed
01.07.2026 / 5 min - Part 03No. 014
Decoding LoRa Below the Noise Floor: A Dechirp Demodulator in 80 Lines of numpy
03.07.2026 / 4 min - Part 04No. 015
Mapping the Spectrum: 24 to 1766 MHz in Nine Seconds
05.07.2026 / 4 min - Part 05No. 016
What SDR to Buy for SIGINT - and the One Spec That Mattered Most
07.07.2026 / 4 min
Part 01 / 05
01Latest entries
Full index, 016 entries →016D / Radio4 min minute read015D / Radio4 min minute read014D / Radio4 min minute read013B / Security5 min minute read012D / Radio5 min minute read011C / Embedded11 min minute read010C / Embedded14 min minute read009E / Leadership21 min minute read
What SDR to Buy for SIGINT - and the One Spec That Mattered MostSDR 5/5
Mapping the Spectrum: 24 to 1766 MHz in Nine SecondsSDR 4/5
Decoding LoRa Below the Noise Floor: A Dechirp Demodulator in 80 Lines of numpySDR 3/5
Reading My Water Meter With a $30 SDR - and the Factory Key Nobody ChangedSDR 2/5
Listening to an Entire 868 MHz Band at Once: Building an SDR HubSDR 1/5
How a 12 KB Audit Ring Buffer Killed My TLS Handshake (And I Chased the Wrong Ghost for an Hour)Updated 09.10
Enterprise-Grade Crypto on a $20 Board: Securing Modbus With ESP32-S3Updated 09.10
Silent Leadership: A Manifest
Updated 09.105 older entries have new material: How a 12 KB Audit Ring Buffer Killed My TLS Handshake, Enterprise, Modbus RTU Over USB, Two Docker One Bug, FutureGrid.
02Projects
Long-running builds →P.02 / GamesEntry 002
WordHunt
A real-time multiplayer word game that grew from a weekend hack into a platform with 22 milestones.
- TypeScript
- WebSocket
- React
- Redis
03 / About
Engineer first, leader by practice.
I lead a team of senior specialists across infrastructure, security and AI, after 15+ years of running systems in production. Outside work the same curiosity goes into embedded hardware, radio and whatever the lab can be convinced to do next.
I invest in people over processes, and build teams that understand products deeper than the vendors themselves.From Entry 009 - Silent Leadership: A Manifest
04 / Contact - questions, corrections, radio stories
pawel@oljasz.com