IRUTESAM V1.0 – A Cost-Effective IoT-Based Multi-Testing Device Using ESP32
Introduction Modern embedded development and wireless testing often require multiple specialized tools for analyzing Wi-Fi networks, testing NFC cards…
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Matter Zigbee Thread Device Migration
Matter, Zigbee & Thread Device Migration – What Your Smart Home Needs Right Now Hey folks, Nick Creighton here – the voice you just heard on the l…
Voice Assistant Smart Home Routines 2025
Voice Assistant Smart Home Routines 2025 Hey there, it’s Nick Creighton from SmartHome Wizardry . If you’ve ever rolled out of bed, squinted at a blin…
How Hedy Lamarr Invented Wireless Frequency Hopping
Ask most engineers who laid the groundwork for modern wireless and you will hear names like Marconi, Shannon, or the committees behind the IEEE 802.11…
Magnificent Humanity, Building Cities, and a Special Announcement!
I'm back from a great vacation and side-quest experience in Asia, where one can always find brilliant human interactions even with imperfect linguisti…
Zigbee Smart Lights Keep Disconnecting? Here's Your Complete Troubleshooting Guide
Zigbee Smart Lights Keep Disconnecting? Here's Your Complete Troubleshooting Guide After three years manufacturing Zigbee lighting products, I've seen…
Build a 32x32 AI Pixel Display with 1024 RGB LEDs Using TuyaOpen
- What if your desk display could respond to voice commands, show AI-generated pixel art, visualize music, display weather, and connect to your smart …
Smart Lighting Protocol Showdown: Zigbee vs Matter vs BLE Mesh (2026)
Smart Lighting Protocol Showdown: Zigbee vs Matter vs BLE Mesh (2026) After deploying thousands of Zigbee smart lights through our manufacturing line …
Java on Raspberry Pi: Rediscovering Java Beyond the Enterprise
When most people think about Java, they immediately picture enterprise applications, banking systems, massive backend services, or decades-old corpora…
When Soldering Doesn't Fix It: Swap the MCU
A hardware-debugging technique that uses your portable firmware codebase as the diagnostic tool. Plus the deeper bug it exposed once I got past the ha…
Sniffing Modbus Traffic with 5 Lines of Python (And Why It Should Scare Your OT Team)
⚠️ For defensive/educational purposes only. Sniff only networks you own or are explicitly authorized to test. Unauthorized network monitoring is illeg…
How AI and Electronics Are Changing Healthcare Devices: The Future of Smart Healthcare Author: Shivam Wakade | Founder, PrivSR
Introduction Healthcare has always relied on one important factor: timely and accurate information. Doctors, nurses, and healthcare professionals make…
Post-quantum cryptography for embedded and IoT: secure boot, TLS and OTA
Post-quantum cryptography is no longer just a research topic. It is starting to affect the way embedded teams design TLS, secure boot, OTA, firmware s…
STM32F103C8T6 vs STM32F103CBT6: Which Cortex-M3 MCU Fits Your Embedded Design?
When designing embedded systems or stepping up from entry-level 8-bit platforms, one of the most reliable and iconic microcontrollers you will encount…
Fiber Optic Camera – Bringing Vision to Impossible Places
Conventional machine vision places the camera at the inspection point. The lens points at the target, and the sensor sits right behind it. This works …
Free SCADA Alternative for Small Facilities - awtSCADA vs Wonderware vs Ignition
Why I Built a Free SCADA Alternative Commercial SCADA systems are insanely expensive: Wonderware (AVEVA): $25,000+ license Ignition: $4,000-$50,000/ye…
I lost my TV remote, so I built one with an Arduino
So, yesterday my primary TV suddenly stopped working, it's a Sony Bravia. What happened?… well god knows… and believe me, sony has no clue even after …
Bare-metal audio ML classifier on microcontrollers: case study
A TinyML audio-classification workflow that trains in Python, exports to C and runs directly inside bare-metal firmware. This DEV.to version is a shor…
Custom ESP32 embedded solution for IoT devices: case study
A custom ESP32 embedded solution with modular firmware, security features and Wi-Fi/BLE connectivity for connected products. This DEV.to version is a …
Pi Lightsaber Lab
What’s the crack jack? Build your own Lightsaber with Raspberry Pi and Java. May the Force (and GPIO) be with you! A fun Star Wars-inspired project us…
The Home Automation Stack That Actually Works (After 3 Years of Tweaking)
I've been running a smart home for 3 years. Here's what survived the "cool demo" phase and became genuinely useful infrastructure. The Graveyard of Fa…
FreeRTOS vs Zephyr vs ThreadX: choosing the right RTOS
Choosing an RTOS is not only about scheduler performance. It affects security, tooling, maintainability, certification and the future shape of the pro…
GPS and GNSS in embedded systems: modules, NMEA and accuracy
GNSS looks simple when a module returns latitude and longitude. It becomes engineering when the product has to work outdoors, indoors, in motion and f…
ESP32 local IoT with Wi-Fi, REST APIs and a web UI
Not every IoT device needs a cloud dashboard or a mobile app. In many cases the best user interface is already in the user pocket: a browser. This is …
GemmaAir: Real-Time Aircraft Engine Safety Monitor using Gemma 4 and IoT
Introduction I am Sam, and I am driven by a mission to make aviation safer. My project, GemmaAir, is an AI-powered system designed to prevent aircraf…
Ubuntu NetworkManager Fooled Me with Routing Metrics
Recently, I was testing a PC-based NVR that supports Dual-LAN and uses Ubuntu. The testing environment was very simple: One NIC was connected to an is…
PortFlow: Bridging Laravel with Serial Hardware, IoT Sensors & Thermal Printers
PortFlow: Bridging Laravel with the Physical World — Serial Hardware, IoT Sensors & Thermal Printers How to connect barcodes scanners, RFID reader…
Anomaly detection on ESP32 with 24 bytes of RAM — no cloud, no malloc
The core idea: Welford's online algorithm The standard way to compute mean and standard deviation requires storing all samples first, then doing two p…
Why Forest Soil Is the Most Sophisticated Monitoring Challenge in Environmental Science
If you work in IoT, environmental sensing, or data systems, forest soil monitoring is one of the most technically interesting problems you'll encounte…