Dear all,

 

I'm looking for help on having  RFCOMM TTY working on a Tinker Board S. Any help will be welcome !!

 

Using : Ubuntu Bionic with Armbian Linux 4.19.69-rockchip

# uname -a
Linux astrotinker 4.19.69-rockchip #5.95 SMP PREEMPT Mon Sep 2 07:34:36 CEST 2019 armv7l armv7l armv7l GNU/Linux

I'm trying to have rfcomm tty working with a bt HC-05 dongle, but RFCOMM TTY seems not to be available. The BT HC-05 is well reconized and connected:

 # bluetoothctl
[NEW] Controller 80:C5:F2:46:E2:C2 astrotinker [default]
[NEW] Device 00:14:03:06:04:ED HC-05_TIC
Agent registered

 

# systemctl restart bluetooth.service

# systemctl status bluetooth.service
● bluetooth.service - Bluetooth service
   Loaded: loaded (/lib/systemd/system/bluetooth.service; enabled; vendor preset: enabled)
   Active: active (running) since Mon 2019-11-25 22:23:51 CET; 3min 30s ago
     Docs: man:bluetoothd(8)
  Process: 5198 ExecStartPost=/usr/bin/rfcomm bind rfcomm1 00:14:03:06:04:ED (code=exited, status=0/SUCCESS)
 Main PID: 5196 (bluetoothd)
   Status: "Running"
    Tasks: 1 (limit: 4784)
   CGroup: /system.slice/bluetooth.service
           └─5196 /usr/lib/bluetooth/bluetoothd -E

Nov 25 22:23:51 astrotinker bluetoothd[5196]: System does not support network plugin
Nov 25 22:23:51 astrotinker bluetoothd[5196]: Bluetooth management interface 1.14 initialized
Nov 25 22:23:51 astrotinker bluetoothd[5196]: Endpoint registered: sender=:1.129 path=/MediaEndpoint/A2DPSource
Nov 25 22:23:51 astrotinker bluetoothd[5196]: Endpoint registered: sender=:1.129 path=/MediaEndpoint/A2DPSink
Nov 25 22:23:51 astrotinker bluetoothd[5196]: Endpoint registered: sender=:1.73 path=/MediaEndpoint/A2DPSource
Nov 25 22:23:51 astrotinker bluetoothd[5196]: Endpoint registered: sender=:1.73 path=/MediaEndpoint/A2DPSink
Nov 25 22:23:51 astrotinker bluetoothd[5196]: RFCOMM server failed for Headset Voice gateway: rfcomm_bind: Address already in use (98)
Nov 25 22:23:51 astrotinker bluetoothd[5196]: RFCOMM server failed for :1.73/Profile/HSPHSProfile/00001108-0000-1000-8000-00805f9b34fb:
Nov 25 22:23:51 astrotinker rfcomm[5198]: RFCOMM TTY support not available
Nov 25 22:23:51 astrotinker systemd[1]: Started Bluetooth service.
 

# journalctl -u bluetooth.service
-- Logs begin at Mon 2019-11-25 00:30:28 CET, end at Mon 2019-11-25 22:23:52 CET. --
Nov 25 00:30:35 astrotinker systemd[1]: Starting Bluetooth service...
Nov 25 00:30:35 astrotinker bluetoothd[1466]: Bluetooth daemon 5.48
Nov 25 00:30:35 astrotinker bluetoothd[1466]: Starting SDP server
Nov 25 00:30:35 astrotinker bluetoothd[1466]: kernel lacks bnep-protocol support
Nov 25 00:30:35 astrotinker bluetoothd[1466]: System does not support network plugin
Nov 25 00:30:35 astrotinker bluetoothd[1466]: Bluetooth management interface 1.14 initialized
Nov 25 00:30:35 astrotinker rfcomm[1467]: RFCOMM TTY support not available

Regards

Franck

 

 

What is this kernel, self-compiled?

Sent from my Pixel using Tapatalk

2 minutes ago, TonyMac32 said:

What is this kernel, self-compiled?

Sent from my Pixel using Tapatalk
 

Well, no, I did not compile the kernel. I think last update (apt upgrade) is from 13/11/19

OK.  I mis-read on my mobile what uname was printing out.

Hi,

 

It seems I'm not the only one : https://forum.radxa.com/t/rfcomm-failures-in-ubuntu-server-image-and-debian-desktop-image/375

 

If linux-rockchip64-current.config is the right configuration for my Tinker Board, then RFCOMM is set to  # CONFIG_BT_RFCOMM is not set

 

Trying to buil da new kernel 

 

root@armbuild:~/build# ./compile.sh
[ o.k. ] Create example config file using template [ config-default.conf ]
[ o.k. ] Using config file [ /root/build/userpatches/config-example.conf ]
/root/build/lib/main.sh: line 136: dialog: command not found
[ error ] ERROR in function source [ main.sh:138 ]
[ error ] No option selected
[ o.k. ] Process terminated

 

root@astrotinker:~# cat /boot/config-4.19.69-rockchip |grep -i rfcomm
CONFIG_BT_RFCOMM=y
# CONFIG_BT_RFCOMM_TTY is not set
 

Please can you enable this module ?

On 11/27/2019 at 5:34 PM, FranckM said:

/root/build/lib/main.sh: line 136: dialog: command not found

This seems to be clear : "dialog" tool isn't present on your machine...

3 hours ago, martinayotte said:

This seems to be clear : "dialog" tool isn't present on your machine...

Obvious, indeed :-)

Hi 

Replying to myself to keeping trace and maybe help someone. So after building a new kernel with CONFIG_BT_RFCOMM_TTY=Y (using a VM), I installed the new packages using build debs :

 

dpkg -i armbian-config_19.11.4_all.deb
dpkg -i armbian-firmware_19.11.4_all.deb
dpkg -i linux-dtb-current-rockchip_19.11.4_armhf.deb
dpkg -i linux-image-current-rockchip_19.11.4_armhf.deb

 

So now my tinker uses : Ubuntu Bionic with Armbian Linux 5.3.18-rockchip

 

and RFCOMM TTY is working