Pairing fails with incorrect code entered error

Question

I am using pca10001 board and started my development from nrf6310/s110/ble_app_hids_keyboard.
SDK version is 6.0.0. I have successfully tested my device with (MCP) Master Control Panel v3.5.0.8226: I can discovery it, I can bond to the device and I can enable the services. The battery service is updating battery level. The key events are sent over bluetooth and the correct pattern is shown in MCP. 
 If I try to pair my device with Windows7HE x64 using LogiLink Bluetooth 4.0 dongle BT0015, I will get the error "Connection failed because an incorrect code was entered". This message appears without delay when I click to pair with my device. 
 For me it seems now that a pin code needs to be entered somewhere. Windows does want it but MCP does not. I have been searching and reading all day long about the pairing but I am still kind of lost.
Any help is appreciated. Also for start, getting it pairing without any pin codes would be great.

Peeter Vois · Accepted Answer

I got my device to work with Linux: the key presses will reach into text editor. So, anyone who is struggling to get hid over gatt device to run, Linux is an option besides W8. 
 My distribution is FedoraCore-20 
 I used bluez-5.14 
 kernel is 3.13.3 
 uhid driver is compiled as module. 
 However I had little struggle to get things running well. Below are some hints for the one who is following this path. 
 Make sure that system is running as expected 
 1# lsmod | grep uhid
 
 you must see here a line showing that uhid is loaded. If not, then issue 
 1.1# modprobe uhid
 
 and verify again. If still nothing then you maybe do not have the module, check from 
 /boot/config-<version> maybe the uhid is hardlinked into kernel. 
 Check that you have deamon running 
 2# ps ax | grep bluetoothd
 
 you must see that the daemon is running. Although for development, it might be good to see the debug log of
the daemon: 
 2.1# service bluetooth stop
 
 and start the daemon in debug mode and store the log into out.log and console 
 2.2# /usr/libexec/bluetooth/bluetoothd -d -n 2&gt;&amp;1 | tee out.log
 
 There is nice command line utility for managing bluetooth devices: 
 3# bluetoothctl
 
 help command is going to give you pretty much ideas what you can do 
 3.1 [bluetooth]# help
 
 check the bluetooth radios with 
 3.1 [bluetooth]# list
 
 and select the radio you want to use with 
 3.2 [bluetooth]# select &lt;controllerMAC&gt;
 
 now you need to power it on 
 3.3 [bluetooth]# power on
 
 to connect to your device the following needs to be done, scanning is a must 
 3.4 [bluetooth]# scan on
 
 if you have seen the mac of your device 
 3.5 [bluetooth]# scan off
 
 now pair with it 
 3.6 [bluetooth]# pair &lt;deviceMAC&gt;
 
 and you need to connect 
 3.7 [bluetooth]# connect &lt;deviceMAC&gt;
 
 To verify that the hid over gatt profile is in use, you can check if the /dev/uhid is open by the bluetoothd 
 4# lsof | grep uhid
 
 you must see a line showing which process has opened the device. 
 Now you are pretty much all set, start using your device and check the out.log if you need to. 
 Good Luck !

Pairing fails with incorrect code entered error

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