Using BLE_GAP_IO_CAPS_DISPLAY_YESNO to allow ble connection on wristband

[Pedro]

Hi, I have a wristband with a full color display and touch with a nRF51822 where I am using SDK12.3.0 and Softdevice 130. I want to display a YES or NO question on the display to allow or not a device to connect to it. I have the display and touch working so I can easily display it and wait for the use to decide. I have already set the BLE_GAP_IO_CAPS_DISPLAY_YESNO on SEC_PARAM_IO_CAPABILITIES but I do not know when I should display the question I how to send the answer back to the phone app or another nrf5 device. Does someone have an example or any idea about how to do that?

[run_ar]

You can find a message sequence chart here. You should look at examples\ble_central_and_peripheral\experimental\ble_app_multirole_lesc
Look at BLE_GAP_EVT_PASSKEY_DISPLAY and m_numneric_match_requested to see how this can be handled.

[Pedro]

Thanks run_ar, I have it working now. I just have to know how to handle older devices that require the passkey to be written.