BLE_NFC_SEC_PARAM_IO_CAPS

[Roei]

Hi,

Small question regarding BLE_NFC_SEC_PARAM_IO_CAPS.

I want my NRF application to advertise so my mobile will connect with passkey.

I need my mobile user to send the passkey which will be displayed on my device.

I'm trying to use BLE_GAP_IO_CAPS_KEYBOARD_DISPLAY, but the result is that the code is present on the mobile and the user has an option to confirm or cancel.

On the other hand - when I use BLE_GAP_IO_CAPS_DISPLAY_ONLY, I get the right result.

What is the reason for that?

Thanks!

[Amanda Hsieh]

Hi, 

BLE_GAP_IO_CAPS_DISPLAY_ONLY is Display Only.

BLE_GAP_IO_CAPS_KEYBOARD_DISPLAY is Keyboard and Display.

This depends on your device capabilities and application requirement. 

-Amanda H.

[Roei]

Is that possible that BLE_GAP_IO_CAPS_DISPLAY_ONLY provides a keyboard for insert passkey?

[Amanda Hsieh]

If you want Keyboard and Display, you should use BLE_GAP_IO_CAPS_KEYBOARD_DISPLAY.

-Amanda H.

[Roei]

The propose is keyboard and display on my nrf52840 device, or on my mobile?

[Amanda Hsieh]

Hi, 

The IO capability flags are used to specify how the user can interface with the peripheral. If the peripheral has a numerical keyboard a passkey can be used in the pairing process. The passkey is typically generated randomly and displayed on the Central device (Mobile), and the user has to enter the passkey on the Peripheral device. If the keys match, the pairing process succeeds.

Please see this post. 

-Amanda H.