Guide

Summary: ESP32-S3 in 30 Seconds ESP32-S3 is Espressif’s dual-core Xtensa LX7 MCU running at 240 MHz with Wi-Fi and Bluetooth 5 (LE). 45 GPIOs, 512 KB of SRAM. Three things set it apart from the classic ESP32: built-in USB OTG, 14 touch channels, and a vector instruction set for neural-network workloads. Codes like N8R8 and N16R8 on the board are not arbitrary: N = flash, R = PSRAM, numbers in megabytes. The board has two USB ports and they behave differently. This is where beginners get stuck. GPIO35, GPIO36 and GPIO37 are unusable on many variants, GPIO19 and GPIO20 belong to USB, and four pins do double duty as strapping pins. Depending on the board revision, the RGB LED sits on either GPIO48 or GPIO38. If your blink sketch does nothing, check that first. If you have built something with an ESP32 and then tried to add a camera, audio, or a color display, you have probably hit the wall: not enough pins, not enough RAM, no USB. ...

Running Claude Code against a non-Claude model works, and you do it on a path the providers document themselves rather than through a hack. Ollama, Moonshot and Z.ai all publish an Anthropic-compatible endpoint. Setup comes down to three environment variables. This guide covers the steps for all three providers, how to make the configuration stick, and the errors people hit most 🔌 The Short Answer Three providers, three addresses Provider ANTHROPIC_BASE_URL Ollama (local) http://localhost:11434 Moonshot / Kimi https://api.moonshot.ai/anthropic Z.ai / GLM https://api.z.ai/api/anthropic MiniMax https://api.minimax.io/anthropic Alibaba / Qwen depends on the plan Add ANTHROPIC_AUTH_TOKEN and a model name and that’s the whole setup. ...

Claude Code isn’t a chat window in your browser. It opens in your terminal, reads your project’s files on its own, edits them, runs the tests and commits. Say “fix that bug” and the expectation is that it finds the file and changes it. This guide walks the path from install to your first code change, and gives a straight answer on the free-version question 🧑‍💻 The Short Answer If you only have a minute Install (Windows PowerShell): irm https://claude.ai/install.ps1 | iex Install (macOS, Linux, WSL): curl -fsSL https://claude.ai/install.sh | bash Start it: cd into your project and type claude No free tier: you need a Claude subscription (Pro, Max, Team, Enterprise) or a prepaid Console account First move: run /init to generate a CLAUDE.md for the project What Is Claude Code? Claude Code is Anthropic’s coding agent for the terminal. What separates it from a regular AI assistant is that it doesn’t only produce text. It has tools for reading files, writing files, running commands and searching the web, and it decides on its own which to use and in what order. ...

Adafruit GFX is the layer nearly every Arduino display library sits on top of. Adafruit_SSD1306, Adafruit_ILI9341, Adafruit_ST7735, the e-paper libraries and dozens of third party drivers all inherit from it, which is why the same drawLine call works on a 128x64 monochrome OLED and on a 320x240 colour TFT. The catch is that the drawing functions live in the base class while the colours, the constructor and the buffer behaviour come from the driver. That split is where most of the confusion comes from. This guide covers the whole API in one place. ...

The 0.96 inch blue OLED is a staple of Arduino projects. It is cheap, it needs two wires, and because it has no backlight its black is genuinely black. Yet half the people wiring one up for the first time end up staring at a blank panel. This guide runs end to end: picking the module, wiring, finding the I2C address, choosing a library, drawing text and shapes, showing bitmaps, building an animation, and fixing the six problems that come up most often. ...