esp8266-2.7.4.zip
i686-w64-mingw32.mklittlefs-fe5bb56.1578453304.zip
i686-w64-mingw32.mkspiffs-7fefeac.1563313032.zip
i686-w64-mingw32.xtensa-lx106-elf-b40a506.1563313032.zip
python3-3.7.2.post1-embed-win32va2.zip
丢到C:\Users\Administrator\AppData\Local\Arduino15\staging\packages
离线包教程 https://blog.csdn.net/uaime/article/details/107798897
1