How to pair ESP32 with BT Classic HID device with PIN/passkey?

[boernsen]

Hi everyone,

as I couldn't find good information about that: what is the procedure to pair the ESP32 with a Bluetooth Classic HID device that requires a 4-digit PIN/passkey when pairing (such as my Bluetooth trackpad)? E.g. at what point and how am I supposed to enter the PIN?

I only found this, but it doesn't give any details nor did it work for me (build error):
https://docs.espressif.com/projects/esp ... iring-mode

Thank you all for your help!