- TMC2209Stepper: use HardwareSerial& constructor (SoftwareSerial deleted on ESP32) - ArduinoJson: replace deprecated containsKey() with doc["key"].is<T>() - esp_task_wdt_init: use struct-based config API (ESP-IDF 5.x) - ESPAsyncWebServer: fix library owner (mathieucarbou, not wifwaf)