Drive an external monitor from an ESP32-S2/S3/P4 through a USB display adapter, with no PC or OS required. DisplayLink DL-1xx on S2/S3/P4; MCT Trigger 6 / MacroSilicon MS91xx on the P4 (USB High-Speed).
Callback-based BLE GATT server abstraction over the ESP-IDF Bluedroid stack: define services and characteristics with simple read/write handlers, no Bluedroid boilerplate.