打开hello-world后，可以使用 ESP-IDF:SDK Configuration editor.
但是esp-at时，出现错误提示：

---------------------------ERROR--------------------------

CMake Error at CMakeLists.txt:9 (string):
string no output variable specified



-----------------------END OF ERROR ...

演示hello_world编译正常，最后能得到bin文件。
但是同样的vscode ESP_IDF环境编译github的 ESP-AT就出错。
提示：

> Executing task: cmake -G Ninja .. <

CMake Error at CMakeLists.txt:9 (string):
string no output variable specified


CMake Error at CMakeLists.txt:13 (string):
string begin index: 9 is out of range 0 - 0


CMake ...

demo程序编译正常：

[86/86] Generating binary image from built executable
esptool.py v3.1-dev
Merged 1 ELF section
Generated C:/ESP/project/hello_world/build/bootloader/bootloader.bin
[990/990] Generating binary image from built executable
esptool.py v3.1-dev
Merged 1 ELF section
Generated C:/ESP/project ...

用下面网页的教程安装流程，安装成功，
https://docs.espressif.com/projects/esp-at/zh_CN/latest/Compile_and_Develop/How_to_clone_project_and_compile_it.html#build-project-overview

=====================================================================================================
使用ESP-IDF launch GUI configation ...