i.MX ProcessorsのトピックRe: Bluez Package

Bluez Package

blessy_abraham — Tue, 03 Sep 2019 14:14:13 GMT

Hi,

I am working with imx7d sabre reference board. I observed a bluetooth unstability (reference board not getting connected with laptops) issue while working with 4.14.98 kernel version. This version uses bluez 5.49.

While bluetooth is stable in 4.1.15 kernel version i.e I am able to connect with laptops/PCs. This uses 5.33 bluez5 package.

How can I rectify this?

Re: Bluez Package

blessy_abraham — Wed, 04 Sep 2019 12:40:51 GMT

Hi team,
Any update? Can you share the yocto project source for 4.1.15-1.2.0

Re: Bluez Package

jamesbone — Wed, 04 Sep 2019 16:11:25 GMT

Here is the link to the sources :

https://www.nxp.com/webapp/Download?colCode=L4.1.15_2.0.1_iMX6UL7D&appType=license

Re: Bluez Package

jamesbone — Thu, 05 Sep 2019 15:11:50 GMT

We verified both linux version "L4.1.15_2.0.0ga_images_MX7DSABRESD.tar.gz" and "L4.14.98_2.0.0_ga_images_MX7DSABRESD.zip" on i.MX7D SABRESD Board. For both the images, we are able to connect with laptop.

Can you please download the above mentioned demo images from this link and verify again. I believe there should not be an issue.

Re: Bluez Package

blessy_abraham — Fri, 06 Sep 2019 06:41:03 GMT

Hi James,

Thank you for your time to verify both the versions. We are on the process of verifying the image specified in the link that you have shared.
Meanwhile could you please send me the steps that you have followed to connect to the laptop?
1. Are you using bluetoothctl & obexctl?
2. What are the steps that you have followed in bluetoothctl?
3. Is the connection to the laptop getting disconnected quickly after it gets connected?
4. Are you able to send and receive files via obexctl (if used) to the reference board?

Re: Bluez Package

blessy_abraham — Thu, 12 Sep 2019 07:15:50 GMT

Hi James,

I have tested with the demo images provided in the link, bluetooth is getting connected to the laptops.
However connection to the phone are getting established only when we follow the below steps in bluetoothctl.
root: $bluetoothctl

[bluetooth]# $power on

[bluetooth]# $agent on
[bluetooth]# $default-agent
[bluetooth]# $discoverable on

Pairing and connection initiated from mobile device.
pairing successful, connection not successful.
[bluetooth]# $power off
[bluetooth]# $power on
[bluetooth]# $agent on
[bluetooth]# $default-agent
[bluetooth]# $discoverable on
connection from mobile to board established successfully.

First time connection from phone to ref.board requires a power off and power on in bluetoothctl. This is not observed while connection from/to laptops in reference board.

Apparently with 4.14.98 image that we had compiled for the board, Only doing the "power off" and "power on" in bluetoothctl makes stable connection to laptops and phones. Do you know why this is happening? are we missing something?