Read in publication order to cross the first threshold of embedded development. Every tutorial ships with copy-ready code, pitfall checklists and acceptance criteria.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
📚 L2 in progress: ADC input & PWM dimming scheduled (weekly updates) · Stuck on an error? Jump to the troubleshooting library
