  _____       ________     _____      ______     _____       _____
 |_   _|     |  __   _|   / ___ `.  .' ____ \   |_   _|     |_   _|
   | |       |_/  / /    |_/___) |  | (___ \_|    | |         | |
   | |   _      .'.' _    .'____.'   _.____`.     | |   _     | |   _
  _| |__/ |   _/ /__/ |  / /_____   | \____) |   _| |__/ |   _| |__/ |
 |________|  |________|  |_______|   \______.'  |________|  |________|

[0xAF]

Stanislav Lechev

af@0xAF.org:~$ █

Explore Terminal Contact Me

scroll down ↓

whoami

About Me

about.txt

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[0xAF]

LZ2SLL

Varna, Bulgaria

Full-Stack Web Developer with deep experience in Linux systems programming, kernel development, and embedded systems. Passionate about low-level hacking, ARM reverse engineering, and building tools that make life easier.

Active contributor to the OpenWebRX+ project and the Bulgarian amateur radio community. Building and maintaining WebSDR infrastructure, repeater databases, and open-source tools for the ham community.

Linux administrator and network designer by trade, open-source advocate by heart. When not coding, probably monitoring radio frequencies or tinkering with microcontrollers.

Languages

Bulgarian

native

English

fluent

Russian

basic

cat ~/.skills

Skills

Systems & Low-Level

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C (POSIX)Linux KernelEmbedded LinuxARM AssemblyMicrocontrollersReverse Engineering

Web Development

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Perl / MojoliciousVueJSTypeScriptNodeJSBashHTML/CSS/JSCloudflare Workers

Data & Infra

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SQL (SQLite/MySQL/PG/Oracle)Redis / MemcacheCouchDBDocker / PodmanProxmoxNetwork Design

Tools & Environment

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GitVIM / VSCode+VIMKDELinux DesktopNodeJSFOSS

cat ~/ham/callsign.txt

Ham Radio

callsign.txt

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LZ2SLL

Stanislav Lechev

Licensed: 13.09.2021

QTH: Varna, Bulgaria

websdr.txt

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WebSDR — Varna

Administering varna.radio — a WebSDR portal aggregating multiple SDR receivers in the Varna region. Powered by OpenWebRX+ with custom plugins.

OpenWebRX+ Docker WebSDR

contributions.txt

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Contributions

OpenWebRX+ JS Plugins — github
BG Repeaters Database & Map — with LZ2DMV — github
OWRX+ Builders — deb · docker · rpi
Meshtastic mesh network — mesh.varna.radio (see Meshtastic section)

varna.radio ham.0xaf.org mesh.varna.radio

meshtastic

Meshtastic & Mesh Networking

mesh.varna.radio

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Building and maintaining a Meshtastic mesh network in the Varna region. Developing tools and bots to bridge mesh networks with Telegram and other services.

mesh.varna.radio

MeshGram-Plus

Meshtastic Bot, BBS, Telegram Gateway, AI chat and much more. A comprehensive bridge between Meshtastic mesh networks and Telegram.

Python Meshtastic Telegram

Meshtastic Keygen

Meshtastic Key Generator/search tool. Generate Private/Public key pairs where the Public key starts or ends with your custom Base64 string.

C Meshtastic Crypto

ls ~/projects/

Projects

OpenWebRX+ Plugins

Plugins collection for OpenWebRX+ receiver and map pages. Externally loadable JS plugins.

BG Repeaters Admin

Web UI to the Bulgarian Repeaters Database. Frontend admin panel for managing repeater entries.

BG Repeaters Worker

Bulgarian Repeaters Database Worker using Cloudflare infrastructure and D1 database.

BG Repeaters Map

Interactive map of Bulgarian amateur radio VHF/UHF repeaters. Maintained with LZ2DMV.

OWRX Telegram Bot

Telegram bot to report OpenWebRX MQTT events. Monitors SDR activity and sends notifications.

Varna Radio

WebSDR portal for Varna, Bulgaria. Aggregates multiple SDR receivers running OpenWebRX+ with custom plugins.

OWRX+ Deb Builder

DEB packages builder for OpenWebRX+. Automated build pipeline for Debian/Ubuntu.

OWRX+ Docker Builder

Docker image builder for OpenWebRX+. Multi-arch container images with all codecs.

OWRX+ RPi Builder

Tool used to create the OpenWebRX+ Raspberry Pi OS images.

ls ~/attic/ The Attic — archived projects from the early 2000s

400plus Canon 400D custom firmware hack C

beep PC Speaker tones and melodies C

bin2hex Binary to hex C header converter C

dos2cp1251 DOS Cyrillic to CP1251 converter Perl

gtetrinet GTetrinet shadow patch & theme C

IIS-Exploit Old IIS 3/4/5 exploit (CVE-2001-0333) Perl

Ikonboard-Exploit Ikonboard 2.1.7 exploit (CVE-2001-0360) Perl

look-smart FBI tracking simulation — look like a hacker Perl

on-file-change Execute command when a file changes Perl

pwldump PWL password dumper (Linux port) C

rss4admins RSS feed generator from log files Perl

tetrinetx TetrinetX server patch with custom commands C

x25scan X25 NUA network scanner C

cat ~/contact.txt

Contact

contact.txt

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✉ Email af+spam@0xAF.org → 🛠 GitHub github.com/0xAF → 🔗 LinkedIn linkedin.com/in/stanislavlechev → 📷 Instagram instagram.com/0xaf → 👥 Facebook facebook.com/slechev → 📡 Ham Radio LZ2SLL →

terminal

Interactive Shell