Thermoelectric Energy Harvesting for Batteryless IoT Sensors
Industrial motors continuously reject energy as heat. Under the right conditions, a small part of that heat can power the sensor used to monitor the m…
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The reconnect storm that never touched the broker
There's a particular kind of 2 a.m. that only happens in fleet IoT. A slice of your devices — a few thousand of them — drop off the network at once. B…
How to Build Rock-Solid Real-Time Data Pipelines from the Factory Floor IoT
Lessons from hooking up stamping presses, welding cells, and MES without dropping a single byte of data. If you’ve ever been tasked with trying to fee…
XChaCha20-Poly1305 in a Mesh Network: A Practical Deep Dive
Most encryption tutorials stop at "use AES-256-GCM." But in a mesh network, the threat model is different. Keys rotate constantly. Messages arrive out…
I built a Tamagotchi with its brain in AWS (and it reads me the news)
Remember Tamagotchis? Those little egg-shaped keychains with a pixelated pet that got hungry, got sad, and, if you were a negligent eight-year-old lik…
Проектируем шеринг вещей с нуля за 250 тысяч рублей
Показываю, как собрать пилот универсального шеринга вещей без собственного производства и приложения за 20 миллионов: готовый шкаф, доставка, заводско…
Why a password is not a security architecture for connected building devices
Connected heating, water, and building devices are now part of the cybersecurity surface of a building. A password screen is not enough. The product n…
A firmware fix instead of a recall: root-cause engineering for a deployed wearable
The wearable was already in the market, on athletes, when the reports started. Units power-cycling at random. Unreliable charging while docked. Data g…
Build vs buy for industrial controllers: the common mistake I see
After 13 years of industrial projects, I can usually tell early how a build-vs-buy decision will go. And it tends to go wrong the same way. The engine…
H5 or Native App for QR-Based Device Rentals? A Decision Framework
A QR code makes a device rental look simple: scan, pay, unlock, return. The client experience behind that QR code is not simple. A product team still …
MikroTik QoS CAKE Optimization, ESP32 IoT Smart Key, and Self-Hosted Server Infrastructure
This technical report comprehensively documents a network infrastructure and embedded systems engineering project. The primary focus encompasses IoT h…
Why ARM Chips Power Nearly Every IoT Device
Look inside almost any modern connected device -- a smartphone, a smartwatch, a Wi-Fi thermostat, a battery-powered sensor node -- and you will find a…
Secure BLE OTA Firmware Updates on nRF5340: Architecture Notes
Firmware updates are one of the places where an embedded prototype either becomes maintainable or becomes expensive to support. The hard part is not m…
Why Is It Called the Raspberry Pi?
If you have ever wired a sensor to a Raspberry Pi or run your first Python script on one, you have used a device whose name hides two small jokes and …
The Architecture of Everything: Database Needs for the Internet of Things (IoT)
A single smart factory floor can generate more sensor readings in an hour than a mid-sized e-commerce site logs in a month. That's the reality behind …
From Beats to Burnout: Real-Time Stress Detection using HRV and Machine Learning
Ever wondered why your Apple Watch or Oura Ring flags a "high stress" day even when you've been sitting at your desk? The secret lies in Heart Rate Va…
4 Cool Open-Source Hardware Projects to Spark Your Next Build
tags: hardware, iot, opensource, electronics As software developers, many of us reach a point where writing code inside a virtual environment isn't qu…
Why I chose PGMQ over Redis for IoT sensor ingestion
In my last post, I introduced CultivatorsLedger — a local-first cultivation telemetry platform built on Next.js, PostgreSQL, and Docker. One of the fi…
🔥 I Built an ESP32 Smart Bike Control System with an Android App (Open Source)
🚀 I Built an ESP32 Smart Bike Control System with an Android App (Open Source) What if your motorcycle could become a smart vehicle without replacing …
This Smart-Home Agent Treats Its Own 1B Model as Untrusted Input
Reliability in an AI agent is a harness property, not a model property. The cleanest proof arrived at the bottom of the model-size ladder: a 688 MB mo…
Gamifying the Game: How Micro-Betting and Smart Stadiums Keep Fans Hooked
The days of simply sitting in a plastic seat, eating a lukewarm hot dog, and watching a game with nothing but a physical scoreboard for context are of…
Engineering Real-Time Telemetry and Secure Clinical Messaging with SignalR
I’ve spent plenty of time wrestling with WebSockets in my career, but things get a lot more intense when you're dealing with live cardiac vitals and p…
System Architecture: Building a Real-Time Physical Analytics Dashboard with MQTT and Edge RFID
In standard web development, building a live analytics dashboard is relatively straightforward: you drop a JS tracker on the frontend, ingest the payl…
How Factory Data Actually Gets from Machines and PLCs to the Cloud
Industry 4.0 data collection sounds simple until you look closely at the factory floor. In theory, the flow is clean: machine → gateway → cloud → dash…
Don't Buy It, Build It: Crafting an Open-Source, Edge-Computing AI Dashcam
Preface Every day, thousands of creative ideas sit completely dormant on workshop shelves around the world. A high-performance microprocessor sits in …
From Smart Devices to Home Operating Systems
Opinion note: this is a subjective Turtleand view, not a prediction or product roadmap. The direction seems possible if the smart home moves from isol…
Building FoilSuite: A Privacy-First Security Toolkit for Browser and IoT Security
Most phishing tools still rely on sending your data to the cloud. That means your “security solution” is often just another data collection point. So …
The First IoT Device Was a Vending Machine
Ask most people to picture the first Internet of Things device and they imagine something sleek: a smart speaker, a fitness band, a Wi-Fi thermostat. …
MAX20151R: The 40V, 500mA Ultra-Low-Noise LDO That Silences Power Rails
Why 40V Input and 500mA Output Matter in Noise-Sensitive Designs You’ve probably fought a power rail that looked clean on a multimeter but still trash…
MQTT to ThingsBoard Setting Up Device Telemetry from Scratch
ThingsBoard is one of the most capable open-source IoT platforms out there. But the first time you try to get a device publishing telemetry over MQTT,…