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Article series

Articles that build on each other, in reading order.

Home Assistant without the cloud

6 published

  1. Zigbee2MQTT vs. ZHA: Building a Highly Reliable Mesh Network in Home Assistant
  2. ESPHome and ESP32 in Practice: Building Cloud-Free Environmental Sensors
  3. Presence Detection 2.0: mmWave Radars (LD2410/LD2450) in Lighting Automation
  4. Local Voice Control in Home Assistant with Whisper & Piper
  5. WireGuard & Tailscale DMZ: Secure External Access to Home Assistant and Self-Hosted Servers
  6. Local Energy Management: Integrating PV Inverters and Battery Storage via Modbus TCP

The Arithmetic Behind an LLM Bill

Input, output, cached input and the batch discount are four prices for the same request. Which one applies depends less on the model than on how the conversation is assembled.

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GTM Integrations for Claude Code: Three MCP Servers, Their Tool Count and Their Context Cost

Changing a Tag Manager container from a prompt means handing a language model an OAuth token. Three MCP servers were started over stdio on 9 September 2026 and asked for their tool list: 18, 33 and 104 tools, and between 20 and 108 kilobytes of definitions that travel with every request. Underneath all three sits the same API with 106 methods, seven scopes and exactly two calls that reach the live container.

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Tutorial: Extracting SVG Graphics from Websites: The Console Method and Alternatives

Extracting scalable vector graphics (SVGs) from websites can be challenging, especially when the graphics are styled using external CSS stylesheets. Standard copying methods often result in the loss of colors and formatting. The following guide details a JavaScript-based method to extract SVGs with fully baked-in styles, along with alternative approaches and instructions for using an […]

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About my Blog (LukasWojcik.com): Technology, Analytics, and Digital Security

This platform is dedicated to exploring the complex intersection of modern technology, Data Analytics, and Digital Privacy. In an era where data structures drive critical decisions, understanding the technical nuances of web analytics, tracking methodologies, and strict compliance frameworks—such as GDPR and Consent Mode v2—is absolutely essential. The articles published here provide in-depth, technical analyses of data collection mechanisms, privacy-first architectures, and industry best practices for maintaining absolute data security in a digital-first environment.

Beyond the digital landscape, the content deeply delves into the physical realm of home automation and physical security. Comprehensive guides and technical reviews cover the latest advancements in Smart Home ecosystems, intelligent climate control, automation protocols, and advanced CCTV surveillance systems. From configuring local network security and firewalls to integrating IP cameras and IoT (Internet of Things) devices seamlessly, the primary focus remains on engineering efficient, highly secure, and future-proof technological environments.

Whether the objective is researching the technical implications of the latest ePrivacy regulations, architecting local automation routines, or optimizing robust data analytics frameworks, this website serves as a comprehensive, well-researched resource for technology professionals, developers, and security enthusiasts.