What a core is, why ESP32 is missing on a fresh IDE 2 install, where packages live on disk, how Additional boards manager URLs work, and how to install, update, and remove board support without guessing.
A map of every official Arduino software tool in 2026 (IDE 2, CLI, App Lab, Cloud, MicroPython, PLC IDE, and the rest), who each one is for, and which one you should install today.
Why ESP32 and ESP8266 are missing from Arduino IDE 2 on day one, how Board Manager URLs and cores work, and a complete install path for Espressif's ESP32 package and the ESP8266 community package, through a first Blink upload.
Why Arduino IDE 2 shows an empty Tools → Port menu, how USB-serial chips and cables actually work, and a Windows-first path through Device Manager, CH340/CP210x/FTDI drivers, ESP boot modes, and port conflicts.
Download the real Arduino IDE 2 for Windows 11, choose MSI vs EXE vs ZIP, get past SmartScreen and USB drivers, finish the first-launch core download, and confirm Blink can compile.
A reference guide to every current Arduino board, shield and kit, with photos, pinouts, features and where to buy, plus retired boards still found in old tutorials.
Not sure which Arduino board to buy? This guide covers every board family — Uno, Nano, Mega, MKR, Portenta — with specs, pinouts, power tips, and project-matching advice.
