Archive
Posts tagged 2026
- Extending the Sensor Network with Zigbee: Inside the Fridge and Freezers
Five SONOFF sensors and a PoE Zigbee hub bring fridge and freezer readings into the existing network, revealing temperature swings and the limits of batteries in the cold.
- A Wi-Fi Sensor That Moves Between Networks
Four ESP32-S3 temperature and humidity sensors are ready. A setup button changes Wi-Fi and UDP settings without reflashing the firmware.
- Overclocking the Raspberry Pi 500: Performance and Limits
Testing the Raspberry Pi 500 at 2.8–3.0 GHz: measured CPU gains, stability during 4K video playback, and the role of cooling and power delivery in everyday use.
- Building Heated Sensor Houses for Outdoor Air, Ground, and Underground Temperature Measurements
Protecting outdoor temperature and humidity measurements from weather, condensation, and cold while keeping the sensors connected over PoE Ethernet.
- A Small Encrypted File You Can Carry Anywhere
A quick guide to creating a portable LUKS2 container for private files, carrying copies on USB drives or cloud storage, and opening it only on trusted Linux computers.
- From Mechanical Wind Sensors to Ultrasonic RS-485 and RP2040
Prototyping a Veinasa CXS02B-N ultrasonic wind sensor over USB, then moving its NMEA-0183 stream onto an RP2040 for a permanent PoE-connected installation.
- A Live Linux Performance Dashboard: From SPI to a Wide-Screen Display
An RP2040 and SPI display experiment grows into a Python dashboard for local and remote Linux machines, with an adaptive CPU heatmap and live memory, disk, and network measurements.
- Displaying Photographs on a Six-Colour E-Paper Screen
Comparing dithering, ordered screening, and AM and FM raster techniques on a 600×400 Waveshare Spectra 6 display driven by a Raspberry Pi 4B.
- Building a PoE E-Paper Temperature and Humidity Monitor
Combining an isolated ESP32 PoE board, an SHT40 temperature and humidity sensor, an e-paper display, and a custom 3D-printed enclosure.
- Building a Resilient, Local-First Sensor Network
How a local-first sensor network keeps collecting through internet outages, synchronizes every minute, processes history centrally, and publishes safely through Cloudflare.
- Indoor Temperature and Humidity Sensors
Building compact wired and wireless sensors for monitoring indoor temperature and humidity.