Nenadsky.com – Insights 4 Linux, IoT, Dev & Blockchain

Exploring the ESP8266 OLED HW-364A: A Versatile Microcontroller for IoT Projects

Nenadsky
2025-07-132025-07-13
ESP32

Introduction

The ESP8266 OLED HW-364A is a compact yet powerful development board that merges the Wi-Fi capabilities of the ESP8266 microcontroller with the convenience of an integrated OLED display. This combination makes it an excellent choice for IoT applications, sensor monitoring, and embedded systems, where real-time data visualization and wireless connectivity are crucial.

Unlike bare ESP8266 modules, this board comes with a pre-soldered SSD1306 OLED screen, eliminating the need for additional wiring when you need a simple user interface. Whether you’re building a smart home device, a portable sensor logger, or a Wi-Fi-enabled display, this microcontroller provides an accessible and efficient solution.

In this article, we’ll take a closer look at its key features, how to set it up, and some practical project ideas to inspire your next build.

The first Solana project: A decentralized voting application

Nenadsky
2025-07-062025-07-06
Blockchain

We start the Solana journey with a decentralized voting application, which allows users to put their own idea, poll, or anything else up for vote. Each proposal has a short description, in order to explain to users the poll they are voting on. In addition, votes for and against are processed in the background and data about it is stored on the blockchain. This voting mechanism, although this application is beginner-friendly, can be applied to various types of applications with more or less modifications. Examples of applications are crowdfunding applications, decision-making support in companies, voting for the best solutions or answers, choosing new functionality for an application, choosing the funniest comment… Along with a brief description of the application being written, we will talk about the basic parts and macros used in the program itself, as well as problems I encountered during work. Problems also require a solution, so that is also part of this text and I hope you find it interesting and useful 🙂

Solana Blockchain: A Fast and Scalable Platform for Decentralized Applications

Nenadsky
2025-06-162025-06-13
Blockchain

Introduction to Solana Blockchain

Solana is one of the fastest blockchain platforms, designed to provide speed, scalability, and low transaction costs. This article will help you understand the basic features of Solana, its advantages over other blockchain networks, and how to start developing applications on this platform.

The Beginning of a Blockchain Journey: Ethereum, Solana, Rust, and Solidity

Неле
2025-06-082025-06-08
Thoughts

Welcome to my journey through the world of blockchain technology! As a developer passionate about innovation, I have always been intrigued by the potential of blockchain beyond cryptocurrency trading. My interest began when a former University assistant introduced me to the concept of decentralized applications (dApps) and their revolutionary possibilities. This series of articles will be my personal diary, a notebook in which I will document my experiences, challenges, and solutions as I delve into development on the Ethereum and Solana blockchains, using the Solidity and Rust programming languages. Whether you are a developer or just curious about blockchain, I hope you will find my journey inspiring and useful.

CNC Laser Engraver - DIY Arduino based project

From Old Computer to CNC Machine: My DIY Story with Arduino

Nenadsky
2025-04-242025-04-24
Arduino

The Initial Spark: Why I Decided to Build My Own CNC Machine

A love of technology and a desire to create something practical and functional from what others consider waste — that was my motivation to start my first DIY CNC project. With a modest budget, but with a lot of enthusiasm, I decided to build a miniature CNC machine using an Arduino controller and recycled parts from an old computer.

Arduino microcontroller and guides and video tutorials

Controlling Lightbulb: A Beginner’s Guide to Using Relays

Nenadsky
2024-12-122024-12-11
Arduino

Introduction to Relays and Arduino

Relays are electrically operated switches that allow low-voltage circuits to control higher-voltage devices. In the context of using Arduino, a popular microcontroller, relays serve as a crucial interface between the low voltage output of the Arduino and the high voltage required by lightbulbs. This capability is essential for projects that involve home automation or any applications requiring control over high-power devices while ensuring user safety and device integrity.

Fedora 41 and Minimal KDE Plasma guide

Nenadsky
2024-11-102024-11-10
Linux

Introduction to Fedora 41

Fedora 41 represents the last version of one of the most popular Linux distributions, earning praise from experts and users around the world. This version brings significant improvements over previous versions, making it an excellent choice for users who want to take full advantage of a modern environment. Performance and stability are key priorities, and the new version reveals many improvements in system settings and hardware support.

Migrating from Arch Linux to OpenSUSE: A New Perspective

Nenadsky
2024-10-072024-10-07
Thoughts

As a long-time Linux user, I have always enjoyed the freedom this operating system provides. However, as time passes, needs and priorities change. For many years I have used Arch Linux , a distribution that fully introduces you to the world of control and customization. If you are not familiar with Arch, it is known for requiring the user to be fully responsible for the system – from installation to configuration of all components. This DIY philosophy is what appeals to many, including myself.