Built-in Bluetooth not working.

• bluetooth
• wifi
• BT/WIFI

• AC

  André Campos

  3/13/24, 10:57 AM

  Hello, I'm trying to enable the built-in Bluetooth, but I was not able to do it. I can see on the schematics that the Bluetooth is connected to uart1, and the WiFi is connected to the SDIO. 
  I can use WiFi without any issue, but every time I try to use bluetoothctl, I get the message: "Waiting to connect to Bluetooth... "
  Executing hciconfig reports nothing, and connmanctl enable Bluetooth responds with a: "bluetooth is not available".
  I tried to execute hciattach -n /dev/ttymxc1 any 115200 noflow nosleep, but i can see on the logs the following errors: "Bluetooth: hci0: command 0x1003 tx timeout, Bluetooth: hci0: command 0x1001 tx timeout, Bluetooth: hci0: command 0x1009 tx timeout".

  Any idea of the procedure to enable Bluetooth? 

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• KK

  Kothandaraman Kannadasan Staff member

  3/15/24, 7:55 AM

  Dear @André Campos, Enter it as a "root" and follow the instructions below to enable Bluetooth.

  Bluetooth boot messages

  # dmesg | grep -i Bluetooth
  

  Start and Enable Bluetooth service

  # systemctl enable bluetooth.service
  # systemctl start bluetooth.service
  

  Device identification

  # hciconfig hci0 up
  # hciconfig
  # hcitool dev
  # hcitool --help

  To connect a device, follow these steps:

  # bluetoothctl
  [bluetooth]# power on
  [bluetooth]# default-agent
  [bluetooth]# pairable on
  [bluetooth]# scan on

  You can verify the status of the Bluetooth service startup by using the following command

  # systemctl status bluetooth
  

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• AC

  André Campos

  3/18/24, 11:40 AM

  Hello @Kothandaraman Kannadasan 

  First of all, thank you for your reply.

  Here are the command's results of what you send to execute:

  
  dmesg | grep -i Bluetooth
  "
  [    0.112085] Bluetooth: Core ver 2.22
  [    0.112112] NET: Registered PF_BLUETOOTH protocol family
  [    0.112118] Bluetooth: HCI device and connection manager initialized
  [    0.112127] Bluetooth: HCI socket layer initialized
  [    0.112137] Bluetooth: L2CAP socket layer initialized
  [    0.112153] Bluetooth: SCO socket layer initialized
  [    1.657555] Bluetooth: HCI UART driver ver 2.3
  [    1.662022] Bluetooth: HCI UART protocol H4 registered
  [    1.667168] Bluetooth: HCI UART protocol BCSP registered
  [    1.672509] Bluetooth: HCI UART protocol LL registered
  [    1.677654] Bluetooth: HCI UART protocol ATH3K registered
  [    1.683072] Bluetooth: HCI UART protocol Three-wire (H5) registered
  [    1.689450] Bluetooth: HCI UART protocol Broadcom registered
  [    1.695135] Bluetooth: HCI UART protocol QCA registered
  [    2.114496] Bluetooth: RFCOMM TTY layer initialized
  [    2.119391] Bluetooth: RFCOMM socket layer initialized
  [    2.124567] Bluetooth: RFCOMM ver 1.11
  [    2.128328] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
  [    2.133646] Bluetooth: BNEP filters: protocol multicast
  [    2.138879] Bluetooth: BNEP socket layer initialized
  [    2.143847] Bluetooth: HIDP (Human Interface Emulation) ver 1.2
  [    2.149779] Bluetooth: HIDP socket layer initialized
  "
  I was able to enable and start the Bluetooth service:
  "root@lec-imx8mp:~# systemctl enable bluetooth.service
  [   79.108886] systemd-sysv-generator[1233]: SysV service '/etc/init.d/umountnfs.sh' lacks a native systemd unit file. Automatically generating a unit file for compatibility. Please update package to in.
  [   79.133940] systemd-sysv-generator[1233]: SysV service '/etc/init.d/save-rtc.sh' lacks a native systemd unit file. Automatically generating a unit file for compatibility. Please update package to inc.
  [   79.158896] systemd-sysv-generator[1233]: SysV service '/etc/init.d/sendsigs' lacks a native systemd unit file. Automatically generating a unit file for compatibility. Please update package to includ.
  [   79.183036] systemd-sysv-generator[1233]: SysV service '/etc/init.d/umountfs' lacks a native systemd unit file. Automatically generating a unit file for compatibility. Please update package to includ.
  [   79.207355] systemd-sysv-generator[1233]: SysV service '/etc/init.d/halt' lacks a native systemd unit file. Automatically generating a unit file for compatibility. Please update package to include a .
  [   79.231141] systemd-sysv-generator[1233]: SysV service '/etc/init.d/reboot' lacks a native systemd unit file. Automatically generating a unit file for compatibility. Please update package to include .
  [   79.255091] systemd-sysv-generator[1233]: SysV service '/etc/init.d/rc.local' lacks a native systemd unit file. Automatically generating a unit file for compatibility. Please update package to includ.
  [   79.279180] systemd-sysv-generator[1233]: SysV service '/etc/init.d/single' lacks a native systemd unit file. Automatically generating a unit file for compatibility. Please update package to include ."

  And I can see that the service is running without any error message:

   

  "Apr 28 17:43:49 lec-imx8mp systemd[1]: Starting Bluetooth service...
  Apr 28 17:43:49 lec-imx8mp bluetoothd[1260]: Bluetooth daemon 5.64
  Apr 28 17:43:49 lec-imx8mp systemd[1]: Started Bluetooth service.
  Apr 28 17:43:49 lec-imx8mp bluetoothd[1260]: Starting SDP server
  Apr 28 17:43:49 lec-imx8mp bluetoothd[1260]: Bluetooth management interface 1.21 initialized
  "

  However, I can't bring hci0 up, since it is not found:
  "root@lec-imx8mp:~# hciconfig hci0 up
  Can't get device info: No such device"

  Executing hcitool dev does not show any available device.

  As you can see, the Bluetooth device is not found, any idea of what the causes can be? I am using the provided kirkstone image provided on the download page. I also tried to use the provided debian image and compile one using Yocto. However, the results were always the same. Any ideas of what may be missing?

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