按发布顺序阅读，跨过嵌入式第一道门槛。全部教程含可复制代码、避坑清单与验收标准，零基础友好。
全面剖析经典 ESP32、S2、S3、C3、C6 及 CAM 芯片的算力天梯、无线协议（Wi-Fi 6/Matter）、PSRAM 内存瓶颈与引脚硬件陷阱，提供 5 大实战场景精准决策树。Full breakdown of the classic ESP32, S2, S3, C3, C6 and CAM chips: performance ladder, radios (Wi-Fi 6/Matter), PSRAM bottlenecks, pin traps — plus a decision tree for 5 typical projects.
零基础搞懂 ESP32 的 GPIO：输入/输出模式、内部上拉下拉电阻、安全电流极限、Strapping 陷阱引脚与 Arduino 实战代码，附避坑速查表。Master ESP32 GPIO from zero: input/output modes, internal pull-up resistors, safe current limits, strapping trap pins and Arduino code with a pitfall cheat sheet.
手把手搭建 ESP32 开发环境：Arduino IDE 2.x 安装、ESP32 板支持包添加、CH340/CP2102 驱动、BOOT 烧录模式，含 COM 口不识别等 6 大高频报错排查表。Set up your ESP32 toolchain step by step: Arduino IDE 2.x install, ESP32 board package, CH340/CP2102 drivers, BOOT flash mode — plus a 6-error troubleshooting table.
逐行拆解 ESP32 第一个程序：setup/loop 结构、板载 LED 点灯、Serial 串口调试、INPUT_PULLUP 按键检测与软件去抖，附 3 个渐进式实战与验收标准。A line-by-line walkthrough of your first ESP32 program: setup/loop structure, Serial debugging, INPUT_PULLUP button reads and software debouncing — 3 progressive exercises with acceptance criteria.
零基础掌握 ESP32 的 ADC：12 位分辨率、analogRead 用法、衰减与量程换算、ADC2 与 Wi-Fi 互斥、精度校准与噪声过滤，附电池电压监测实战与避坑速查表。Master ESP32 analog input from zero: 12-bit resolution, analogRead usage, attenuation and range conversion, the ADC2/Wi-Fi conflict, calibration and noise filtering — with a battery monitoring project and pitfall cheat sheet.
从 analogWrite 到 LEDC 底层：16 个 PWM 通道、频率与分辨率的数学关系、呼吸灯实战、舵机 50Hz 与 RGB 灯带控制，附新旧 API 对照与避坑速查表。From analogWrite to the LEDC engine: 16 PWM channels, the frequency/resolution math, a breathing LED project, 50Hz servos and RGB control — with old vs new API tables and a pitfall cheat sheet.
从轮询到中断的思维跃迁：attachInterrupt 三种触发模式、ISR 编写五条铁律、volatile 与 IRAM_ATTR 的真实含义、RC 硬件去抖电路与软件时间戳去抖，附多任务临界区与避坑速查表。The jump from polling to interrupts: the three trigger modes, five ISR rules, what volatile and IRAM_ATTR really mean, RC debounce circuits and timestamp debouncing — with critical sections and a pitfall cheat sheet.
周期性任务的四层武器库：delay 的陷阱、millis() 非阻塞范式、Ticker 轻量回调、硬件定时器微秒级精度与看门狗关系，含多任务调度器雏形与避坑速查表。The four-layer toolbox for periodic tasks: the delay trap, the millis() non-blocking pattern, lightweight Ticker callbacks, microsecond hardware timers and the watchdog — with a selection decision tree and cheat sheet.
外设通信三大总线一次讲透：UART 串口透传与引脚重映射、I2C 主从架构与 7 位地址（附扫描器代码）、SPI 速度之王与 CPOL/CPHA，附选型决策树与避坑速查表。All three peripheral buses in one guide: UART transparent bridging and pin remapping, the I2C master-slave architecture and 7-bit addresses (with scanner code), SPI the speed king and CPOL/CPHA — with a selection tree and pitfall cheat sheet.
DAC 与 PWM 的本质区别、经典 ESP32 的 8 位真模拟输出、dacWrite/ledcWriteAttachedDAC 用法、波形生成与音频入门，含各芯片 DAC 可用性速查。The real difference between DAC and PWM, the classic ESP32's 8-bit true analog outputs, dacWrite usage, waveform generation and an audio primer — with per-chip DAC availability.
让手机浏览器直接控制 ESP32：WebServer 托管网页、路由处理与 REST API 设计、mDNS 记忆域名 esp32.local、AJAX 动态刷新与无刷新控制，完成 L2 验收项目。Control an ESP32 from a phone browser: hosting pages with WebServer, routing and REST API design, remembering the esp32.local mDNS name, AJAX dynamic refresh — completing the L2 acceptance project.
从零接通 Wi-Fi：STA/AP/AP+STA 三种工作模式、阻塞与事件驱动两种连接姿势、自动重连与状态机管理、WiFiClient 发起 GET/POST、ArduinoJson 解析 API，附避坑速查表。Get Wi-Fi working from zero: the three operating modes, blocking vs event-driven connection styles, auto-reconnect state management, WiFiClient GET/POST and parsing APIs with ArduinoJson — with a pitfall cheat sheet.
📚 L2 更新中：ADC 模拟输入、PWM 调光已排期（每周更新）· 遇到报错？直达 避坑排错库
