这里我准备按照官方目录，把examples里面的东西都列出来，这篇不会写的太详细，我也刚开始学习，应该会编辑很久，当一个目录来使用。后面需要用到examples里的具体内容，再单独开一篇笔记记录下来。
有中文注释的是我研究过源码的部分。
我用的板子是esp32c3 chip with 1 CPU core(s), WiFi/BLE, silicon revision v0.4, 2MB external flash，要注意看有的demo不支持这款板子
1.get-started（开始）
Simple examples with minimal functionality. Good start point for beginners.
功能最少的示例，适合新手。
blink
亮灯demo,支持高低电平控制或者RBG灯控制，在menuconfig里面可配置亮灯参数。
hello_world
打印选用esp芯片参数，配置，版本，flash大小，延时重启。
sample_project
这是一个可编译工程样板，只有一个头文件和一个空的主函数。
2.bluetooth（蓝牙）
nimble
hci
ble_get_started
bluedroid
Classic BT, BLE and coex examples using default Bluedroid host stack.
ble
contains BLE examples
包含蓝牙示例
a2dp_sink
A2DP-SINK A2DP音频接收器
本示例涉及到使用蓝牙传统配置文件A2DP用于音频流接收，AVRCP用于媒体信息通知，以及I2S用于音频流输出接口。
像蓝牙扬声器这样的应用程序可以利用这个例子作为基本功能的参考。
只支持不带后缀的ESP32，我的ESP32-C3不能编译
a2dp_source
bt_discovery
bt_hid_mouse_device
bt_l2cap_client
bt_l2cap_server
bt_spp_acceptor
bt_spp_initiator
bt_spp_vfs_acceptor
bt_spp_vfs_initiator
hfp_ag
hfp_hf
ble_50
contains BLE 5.0 examples
包含蓝牙5.0示例
classic_bt
contains Classic BT examples
包含蓝牙经典例子
coex
contains Classic BT and BLE coex examples
blufi
esp_ble_mesh
esp_hid_device
esp_hid_host
3.build_system
Examples of build system features.
4.custom_bootloader
5.cxx
C++ language utilization examples and experimental components.
6.ethernet
Ethernet network examples.
7.mesh
Wi-Fi Mesh examples.
8.network
Examples related to general network environment, test & analysis.
9.openthread
OpenThread examples.
10.peripherals
Examples showing driver functionality for the various onboard ESP32 peripherals.
11.phy
12.protocols
Examples showing network protocol interactions.
13.provisioning
Wi-Fi provisioning examples.
14.security
Examples about security features.
15.storage
Examples showing data storage methods using SPI flash, external storage like the SD/MMC interface and flash partitioning.
16.system
Demonstrates some internal chip features, or debugging & development tools.
17.wifi
Advanced Wi-Fi features (For network protocol examples, see protocols instead.)
18.zigbee
Zigbee network and device examples.
