Prepare esp32 environment

Quick start ：

Quick start - ESP32 - — ESP-IDF Programming Guide latest file

At home gitee The address of ：

git clone https://gitee.com/EspressifSystems/esp-idf.git

git clone https://gitee.com/EspressifSystems/esp-gitee-tools.git

Set the environment variable , So as to give priority to Espressif Download the server Github Download resources

cd ~/esp/esp-idf
export IDF_GITHUB_ASSETS="dl.espressif.com/github_assets"
./install.sh