esp_timer_example_main.c do not work on Arduino IDE · Issue #1552 · espressif/arduino-esp32 · GitHub
ESP32-esp_timerのラッピングクラス | Take4-blue
ESP32 の命令実行サイクル数 (2) - シンセ・アンプラグド
ESP32 powered LED matrix displaying real-time news, weather, stock, date, time, barometer data, menu and web interface with not… | Led matrix, Arduino wifi, Arduino