which ESP32 can read from BT HID keyboard (e.g., scanf(), gets(), std::cin ) ?

[dsyleixa]

is there a ESP32 version which can connect to a BT HID keyboard and then read user input via stdin (e.g., scanf(), gets(), std::cin ) ?

[lbernstone]

https://products.espressif.com

ESP32 has BT + BLE
ESP32-S2 has no bluetooth
All other variants are BLE only

[dsyleixa]

what means BLE?
now which one can detect and connect to a BT HID keyboard and then read input?
which BT (or whatever) keyboards are supported?
Where can keyboard ino examples be found for Arduino IDE?

[dsyleixa]

no ideas?
or HID keyboards not possible?

[ESP_Sprite]

It's certainly possible, e.g. https://github.com/Spritetm/esp32c3-doo ... nimble-hid is an ESP-IDF project that talks to a BTLE keyboard (or other HID device). It uses an event interface, but you could code it up to a newlib file descriptor to use sscanf etc on it. I don't think anyone did that, however, and I'm not sure if there's an Arduino equivalent either.

[dsyleixa]

thank you, but I do not understand.
1st, there are no demo pictures and no explanations in your link,
2nd, I need Arduino IDE/API for it, no IDF, and
3rd, I cannot see how this linked lib would work with exactly which BT HID keyboard types (all types? e.g. this one?
https://www.amazon.de/Rii-Bluetooth-Mul ... 3%95%C3%91,
beginning with stand-allone BT-pairing after board-boot/startup.

OTOH, for general programming usage I would need it for standard C or C++ libs (stdio.h/cstdio, std::cin) to work out of the box.

[ESP_Sprite]

Okay, let me be clearer: it certainly is *possible* to do what you need, and the parts that a competent programmer can use to implement this are there, but if you need an out-of-the-box solution that does exactly what you want, you're out of luck as to my knowledge that does not exist.

[dsyleixa]

Thank you for your reply.
I actually had expected the ESP32-Arduino API to have more such features meanwhile, tbh...