RASPBERRY PI3 min read
Special Project: AquaForge Aquaponics Digital Twin
A long-form project report on building a digital twin for aquaponics using Arduino, Raspberry Pi, and Rust.
TECHNICAL JOURNAL · BUDAPEST
Field notes from
a curious system.
Field notes on local AI and inference, reliable DevOps pipelines and observability, Raspberry Pi builds, and calm homelab networking.
LAB / DIAGRAM NOT LIVE TELEMETRY
62PUBLISHED
NOTES
NOTES
06SPECIAL
PROJECTS
PROJECTS
01 / FEATURED FIELD NOTE
SPECIAL PROJECT · FROM THE LAB
02 / RECENT TRANSMISSIONS
Notes from the lab
ARTIFICIAL INTELLIGENCE
Raspberry Pi 5 as a Local LLM Server
A practical, measured look at running local language models on a Raspberry Pi 5: which model sizes and quantization levels are realistic, what power and thermal limits to expect, and when a mini-PC is the better call.
HOMELAB AND NETWORKING
VLANs for a Small Homelab Without Unnecessary Complexity
How to introduce VLANs into a small homelab without turning a hobby network into an unmaintainable maze — plus the recovery steps for when segmentation locks you out.
RASPBERRY PI
Raspberry Pi Observability at Home
Building home observability on Raspberry Pi without drowning the SD card: what to collect, what to skip, and how to keep the stack lighter than the workloads it watches.
ARTIFICIAL INTELLIGENCE
Running Local AI Without Heating the Entire House
A measurement-first look at running local language models at home: where quantization helps, what power draw actually looks like, and when the cloud still wins.
03 / TOPICS
4 THREADS
Artificial Intelligence2 notesPractical AI: local models, inference, tooling, and honest measurement.Raspberry Pi17 notesSmall single-board computers put to real, tested use.DevOps17 notesBoring, reliable delivery: pipelines, observability, and operations.Homelab and Networking26 notesHome infrastructure and networking designed to be observable and calm.
04 / ACTIVE SERIES
ORDERED READING
Practical Local AI
Running useful AI on your own hardware without pretending the trade-offs do not exist.
Follow the series05 / THE HUMAN IN THE LOOP
I build systems to understand them — then write down what the diagrams leave out.
I'm Gábor Lepsényi, a technologist and incurable tinkerer based in Budapest. I write about running local AI and inference, keeping DevOps pipelines and observability boring, Raspberry Pi and embedded builds, and calm homelab networking.
No recycled release notes and no ten-minute miracle builds — just careful experiments, honest constraints, useful measurements, and enough context to reproduce the work. You can also find me writing in Hungarian at rust.hu and aws.hu.