any API that we can send buffer data to my hosts machine with USB interface?

[david711205]

Does ESP-IDF has API that we can send buffer data to my hosts machine with USB interface?
For example, on ESP32 side, we would like to use its Wi-Fi connection to get an AP MAC address and use USB interface to send the binary data of the AP MAC address to my PC.

[ESP_Sprite]

The ESP32 does not have native USB, what you're thinking of as USB most likely is the USB-to-serial converter connected to the ESP32s serial port. So the most likely API for this is the UART api, or just printf if you're feeling lazy.