https://devzone.nordicsemi.com/f/nordic-q-a/59200/custom-hid-firmware-ios-discoveryWe have added custom HID firmware and are able to discover it on the Android Bluetooth Settings app. iOS fails to show the Bluetooth device on iOS Bluetooth Settings app. static void gap_params_init(void) { BLE_GAP_CONN_SEC_MODE_SET_OPEN(&amp;sec_mode);en-USTelligent Community 13Wed, 18 Mar 2020 09:38:42 GMThttps://devzone.nordicsemi.com/thread/240378?ContentTypeID=1Wed, 18 Mar 2020 09:38:42 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0a777a67-d50f-4ebf-9a7b-58f07aeb531dKenneth<p>Hello,</p> <p>To debug this I suggest that you start with the default HID keyboard example from the SDK, and then copy in parts of you code until it fails. For instance first just copy the report map, does it still work? Then update the security requirements, does it still work? Then update the gap params, does it still work? Once you know what setting is causing it to fail I can be of more help.</p> <p>Best regards,<br />Kenneth</p><div style="clear:both;"></div>