Visual Studio Code configuration for ESP32

• you should set IDF_PATH and XTENSA_ESP32_ELF_PATH environment variables when use the configuration files

Environment Variables Set

take ubuntu for example, you can add the following to the end of ~/.profilefile (user profile file) or /etc/profile (system profile file)

export IDF_PATH=/home/liber/esp/esp-idf
export XTENSA_ESP32_ELF_PATH=/home/liber/esp/xtensa-esp32-elf