方法一 通过命令行的形式

项目工程的文件夹下，执行在命令行：

idf.py -C components create-component my_component

方法二 修改项目文件的CMakeLists

修改前：

# For more information about build system see
# https://docs.espressif.com/projects/esp-idf/en/latest/api-guides/build-system.html
# The following five lines of boilerplate have to be in your project's
# CMakeLists in this exact order for cmake to work correctly
cmake_minimum_required(VERSION 3.5)

include($ENV{IDF_PATH}/tools/cmake/project.cmake)
project(TestenvPro)

修改后：

cmake_minimum_required(VERSION 3.5)

set(EXTRA_COMPONENT_DIRS "./components")
include($ENV{IDF_PATH}/tools/cmake/project.cmake)
project(TestenvPro)