VAR-SOM-AM33 Bluetooth Krogoth

Bluetooth

Bluetooth initialization

Load bluetooth driver

$ modprobe btwilink
[   71.683001] (stc):  chnl_id list empty :4 
[   71.686976] (stk) : st_kim_startroot@varsomam33:~# (stk) :ldisc_install = 1
[   71.856713] (stc): st_tty_open (stk) :line discipline installed
[   71.869458] (stk) :ti-connectivity/TIInit_11.8.32.bts(stk) :change remote baud rate command in firmware
[   71.888650] (stk) :skipping the wait event of change remote baud[   72.647550] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[   72.665758] Bluetooth: BNEP filters: protocol multicast
[   72.685879] Bluetooth: BNEP socket layer initialized
[   72.700329] (stc): add_channel_to_table: id 4
[   72.704738] (stc): add_channel_to_table: id 2
[   72.709373] (stc): add_channel_to_table: id 3
[   72.844898] Bluetooth: RFCOMM TTY layer initialized
[   72.863512] Bluetooth: RFCOMM socket layer initialized
[   72.898377] Bluetooth: RFCOMM ver 1.11
[   74.746065] (stc): remove_channel_from_table: id 3
[   74.750912] (stc): remove_channel_from_table: id 2
[   74.755769] (stc): remove_channel_from_table: id 4
[   74.762149] (stc):  all chnl_ids unregistered 
[   74.766525] (stk) :ldisc_install = 0(stc): st_tty_close 

Device identification

After the File system is up 'hciconfig' should show the connected bluetooth module.

hciconfig
hci0:   Type: BR/EDR  Bus: UART
        BD Address: 64:A3:CB:5B:69:F0  ACL MTU: 1021:8  SCO MTU: 64:1
        UP RUNNING PSCAN 
        RX bytes:1772 acl:0 sco:0 events:69 errors:0
        TX bytes:1152 acl:0 sco:0 commands:65 errors:0

The hcitool can be used to show the Bluetooth MAC address of the Bluetooth module with the respective hci connection. Type help to show commands.

root@varsomam33:~# hcitool dev
Devices:
        hci0    64:A3:CB:5B:69:F0

Connecting to classic bluetooth devices

You can manage bluetooth with bluetoothctl, type 'bluetoothctl' and enter the interface. Type help to show commands.
For connecting a device do the following:

$ bluetoothctl
[bluetooth]# power on
[bluetooth]# agent on
[bluetooth]# pairable on

Push the connect button in the device

[bluetooth]# scan on

Copy mac address

[bluetooth]# scan off
[bluetooth]# pair <mac address>

Approve pairing on Device if required

[bluetooth]# trust <mac address>
[bluetooth]# connect <mac address>
[bluetooth]# quit

For example when connecting a microsoft bluetooth mouse the following is done:

root@varsomam33:~# bluetoothctl
[NEW] Controller 78:A5:04:2A:E0:C8 varsomam33 [default]
[bluetooth]# power on
[  418.812442] (stc):  chnl_id list empty :4 (stk) : st_kim_start
[  418.927451] (stk) :ldisc_install = 1[bluetooth]# (stc): st_tty_open 
[  418.986169] (stk) :line discipline installed(stk) :ti-connectivity/TIInit_11.8.32.bts
[  418.999664] (stk) :change remote baud rate command in firmware(stk) :skipping the wait event of change remote baud
[  419.826440] (stc): add_channel_to_table: id 4
[  419.831116] (stc): add_channel_to_table: id 2
[  419.835494] (stc): add_channel_to_table: id 3
[CHG] Controller 78:A5:04:2A:E0:C8 Class: 0x200000
Changing power on succeeded
[CHG] Controller 78:A5:04:2A:E0:C8 Powered: yes

[bluetooth]# agent on
Agent registered
[bluetooth]# pairable on
Changing pairable on succeeded
[bluetooth]# scan on
Discovery started
[CHG] Controller 50:72:24:11:EF:B0 Discovering: yes
[NEW] Device 00:1D:D8:39:93:46 Microsoft Bluetooth Notebook Mouse 5000
[bluetooth]# scan off
[CHG] Device 00:1D:D8:39:93:46 RSSI is nil
Discovery stopped
[CHG] Controller 50:72:24:11:EF:B0 Discovering: no
[bluetooth]# pair 00:1D:D8:39:93:46
Attempting to pair with 00:1D:D8:39:93:46
[CHG] Device 00:1D:D8:39:93:46 Connected: yes
[CHG] Device 00:1D:D8:39:93:46 Modalias: usb:v045Ep0700d0100
[CHG] Device 00:1D:D8:39:93:46 UUIDs:
        00001000-0000-1000-8000-00805f9b34fb
        00001124-0000-1000-8000-00805f9b34fb
        00001200-0000-1000-8000-00805f9b34fb
[CHG] Device 00:1D:D8:39:93:46 Paired: yes
Pairing successful
[CHG] Device 00:1D:D8:39:93:46 Connected: no
[bluetooth]# trust 00:1D:D8:39:93:46
[CHG] Device 00:1D:D8:39:93:46 Trusted: yes
Changing 00:1D:D8:39:93:46 trust succeeded
[bluetooth]# connect 00:1D:D8:39:93:46
Attempting to connect to 00:1D:D8:39:93:46
[CHG] Device 00:1D:D8:39:93:46 Connected: yes
[bluetooth]# hid-generic 0005:045E:0700.0001: unknown main item tag 0x0
input: Microsoft Bluetooth Notebook Mouse 5000 as /devices/soc0/soc.0/2100000.aips-bus/21e8000.serial/tty/ttymxc1/hci0/hci0:1/0005:045E:0700.0001/input/input1
Connection successful
[bhid-generic 0005:045E:0700.0001: input: BLUETOOTH HID v1.00 Mouse [Microsoft Bluetooth Notebook Mouse 5000] on 50:72:24:11:ef:b0
[bluetooth]# quit
[DEL] Controller 50:72:24:11:EF:B0 BlueZ 5.28 [default]
root@varsomam33:~#

Connecting to BLE devices

Connecting to BLE devices requires different command sequence:

$ btmgmt [mgmt]# power on [mgmt]# find

Copy MAC address of LE device

[mgmt]# quit

$ gatttool -b <MAC> [-t random] -I

For example when connecting to "BLE Peripheral Simulator" on Android phone the following is done:

root@varsomam33:~# btmgmt [mgmt]# info Index list with 1 item hci0: Primary controller

       addr 78:A5:04:2A:E0:C8 version 7 manufacturer 13 class 0x000000
       supported settings: powered connectable fast-connectable discoverable bondable link-security ssp br/edr hs le advertising secure-conn debug-keys privacy static-addr 
       current settings: bondable ssp br/edr le secure-conn 
       name varsomam33
       short name 

[mgmt]# power on [mgmt]# [ 79.807814] (stc): chnl_id list empty :4 (stk) : st_kim_start [ 79.923886] (stk) :ldisc_install = 1(stc): st_tty_open [ 79.982113] (stk) :line discipline installed(stk) :ti-connectivity/TIInit_11.8.32.bts [ 79.991772] (stk) :change remote baud rate command in firmware(stk) :skipping the wait event of change remote baud [ 80.559380] (stc): add_channel_to_table: id 4 [ 80.564007] (stc): add_channel_to_table: id 2 [ 80.570047] (stc): add_channel_to_table: id 3 hci0 class of device changed: 0x000000 hci0 Set Powered complete, settings: powered bondable ssp br/edr le secure-conn [mgmt]# find Discovery started hci0 type 7 discovering on hci0 dev_found: 74:B9:AB:CF:13:A9 type LE Random rssi -90 flags 0x0000 AD flags 0x1a name Galaxy S5 hci0 dev_found: 00:1A:7D:DA:71:0B type BR/EDR rssi -79 flags 0x0000 name SMTBT hci0 dev_found: 00:1A:7D:DA:71:11 type BR/EDR rssi -96 flags 0x0001 eir_len 5 confirm_name succeeded for 00:1A:7D:DA:71:11 hci0 type 7 discovering off [mgmt]# quit

root@varsomam33:~# gatttool -t random -b 74:B9:AB:CF:13:A9 -I [74:B9:AB:CF:13:A9][LE]> connect Attempting to connect to 74:B9:AB:CF:13:A9 [74:B9:AB:CF:13:A9][LE]> [ 132.648712] NET: Registered protocol family 38 Connection successful Indication handle = 0x0003 value: 01 00 ff ff [74:B9:AB:CF:13:A9][LE]>