ESP32 and ESP-IDF guides

Short, practical answers to the problems people hit when they start with ESP-IDF, and step-by-step examples you can build and flash from the browser.

• Setup · Windows Fix "idf.py is not recognized" on Windows Why PowerShell and VS Code terminals cannot find idf.py, and the four fixes that work.
• Setup · Linux and macOS ESP-IDF: "python_env … does not exist" after export.sh What install.sh and export.sh each do, and how to get a working Python environment again.
• Tutorial · UART ESP32 UART echo with ESP-IDF, built in the browser Read and write a second UART: wiring, the code line by line, build, flash and test.