ONLINE // North West UK

Vibing through life,
trying to understand why.

I'm D, based in Cumbria. I spend my spare time on embedded systems, software-defined radio, antennas, and whatever project is currently on the bench. This site is a technical log of that work — written primarily so I remember what I did, but hopefully useful to others following similar paths.

My SDR setup runs on a Raspberry Pi 5 with an RTL-SDR Blog V4 dongle. I operate a radiosonde receiving station registered on SondeHub as KendSond (lat 54.322, lon -2.744), and I've built several companion display projects on the ESP32 CYD platform.

I'm also into LoRa/mesh networking (MeshCore, Meshtastic), 3D printing, EV ownership, and home energy systems. The common thread: I want to understand what's happening underneath, not just that it works.

// DOMAINS
SDR / RTL-SDR Raspberry Pi ESP32 Antenna Design LoRa / MeshCore FreeRTOS Docker Linux RF / 403 MHz / 869 MHz 3D Printing (ASA/PLA) NanoVNA Home Energy
// CURRENTLY ACTIVE
  • SDRangel headless server on Pi 5
  • Radiosonde tracking — KendSond on SondeHub
  • CYD ADS-B aircraft display firmware
  • Solar MeshCore node build (Seeed XIAO nRF52840)
// operator.json 
{
  "handle": "31a50n3",
  "location": "Cumbria, UK",
  "station": "KendSond",

    

  "hardware": [
    "Raspberry Pi 5",
    "RTL-SDR Blog V4",
    "ESP32 CYD",
    "Heltec V3",
    "Orange Pi Zero 3",
    "Bambu Lab P1S"
  ],
  "primary_bands": [
    "403 MHz",
    "869 MHz",
    "1090 MHz"
  ],
  "projects_logged": 8,
  "open_to_collab": true
}

// CONTACT

GITHUB github.com/dbi-dev
SONDEHUB KendSond station
EMAIL root@31a50n3.net
USERNAME 31a50n3 (various platforms)