RE: Pairing fails with incorrect code entered error

Peeter Vois — Sat, 22 Feb 2014 10:59:29 GMT

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 !

RE: Pairing fails with incorrect code entered error

Peeter Vois — Fri, 21 Feb 2014 15:18:08 GMT

I have found that W7 is not supporting this thing correctly. W8 must have available drivers. I managed to pair the device with Linux (FedoraCore20) which does have bluez-5.14. Bluez-4 does not support HoGP. Now I can also connect to the device but seems that I need to do more work on getting the key presses running.

RE: Pairing fails with incorrect code entered error

Peeter Vois — Thu, 20 Feb 2014 17:29:05 GMT

I have following news, when I specify

#define SEC_PARAM_IO_CAPABILITIES BLE_GAP_IO_CAPS_KEYBOARD_ONLY

instead of BLE_GAP_IO_CAPS_NONE,

Then windows is asking me to enter a code into my device. At the moment I can not do that.