ESP32-S3 as BLE HCI-UART Host only

[diolupo]

Hi,
does anyone know if using ESP-IDF, is possible to configure the ESP32-S3 as BLE HCI Host only that uses HCI-UART as transport layer to communicate with an external BLE HCI-UART Controller?

[axellin]

NimBLE supports "BLE HCI-UART Host only" case.
I'm sure it's working because I already use it for my project.
Maybe you can create a feature request in esp-idf.

[diolupo]

I've already obtained some successful results porting the default ESP-IDF implementation (that uses the internal VHCI interface) to use a real HCI-UART interface (now I'm able to send HCI commands / receive HCI events to an external nRF52 that runs Zephyr).
But it required to understand how Nimble stuff works inside ESP-IDF (change some sources, etc...) and it takes some time...