Re: How to use BLE with kernel 3.4?

Hi Johan,

2016-04-28 19:54 GMT+09:00 Johan Hedberg [off-list ref]:

Hi Tak,

On Thu, Apr 28, 2016, Hyuntak Lee wrote:

quoted

I’m working on an embedded board of allwinner.
I try to use BLE to communicate with mobile or other BLE peripheral devices.
But kernel version of provided allwinner is ‘3.4’.
I already know BlueZ5 BLE supports at least kernel 3.5 version, and
‘LEAdvertisingManager1’ is 4.1 and later versions support only.
I would much prefer to use bluez, but the embedded system kernel
version is too low.

Do you have any plan for supporting the embedded system?
Almost embedded systems are low kernel version.

At this point, I can consider two options

1. Try to backports for updating Linux BT subsystem of kernel 4.1 and
later. And try to BLE with the most recent bluez.
2. Find and try another BLE stack implementations

Please give me some advice or an opinion.
Thank you for your consideration.

It'd probably make sense for you to look into the kernel backports
project. We've used that to e.g. backport the latest Bluetooth subsystem
to some old kernel versions used by Android:

        https://backports.wiki.kernel.org/index.php/Main_Page

Thank you for reply

My purpose is that execute 'bluez-5.39/test/example-advertisement'
script on 3.4 kernel version.
But LEAdvertisingManager1 require 4.1 and
later.(http://permalink.gmane.org/gmane.linux.bluez.kernel/63228)

So, According to your advice I try to backport the bluetooth subsystem
of 4.1 kernel to 3.4 kernel.
(http://drvbp1.linux-foundation.org/~mcgrof/rel-html/backports/)

Thank you for your consideration.
Tak

Johan