Bluetooth problem: connect mobile device to TX2

Autonomous Machines Jetson & Embedded Systems Jetson TX2
1

I tried to control bluetooth in TX2.
After I login to bluetoothctl command, it shows following error:

[bluetooth]# power on
No default controller available
[bluetooth]# show
No default controller available

However, I have checked following command and it seems everything goes well.

# hciconfig -a
hci0:	Type: BR/EDR  Bus: UART
	BD Address: 00:04:4B:8C:98:BE  ACL MTU: 1021:8  SCO MTU: 64:1
	UP RUNNING 
	RX bytes:1469 acl:0 sco:0 events:87 errors:0
	TX bytes:2589 acl:0 sco:0 commands:87 errors:0
	Features: 0xbf 0xfe 0xcf 0xfe 0xdb 0xff 0x7b 0x87
	Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3 
	Link policy: RSWITCH SNIFF 
	Link mode: SLAVE ACCEPT 
	Name: 'jetson-tx2-07c42aa'
	Class: 0x000000
	Service Classes: Unspecified
	Device Class: Miscellaneous, 
	HCI Version: 4.1 (0x7)  Revision: 0x1000
	LMP Version: 4.1 (0x7)  Subversion: 0x610c
	Manufacturer: Broadcom Corporation (15)

# hcitool dev
Devices:
	hci0	00:04:4B:8C:98:BE
rivs@arroway:/$ bluetoothctl

# rfkill list
0: bluedroid_pm: Bluetooth
	Soft blocked: no
	Hard blocked: no
1: phy0: Wireless LAN
	Soft blocked: no
	Hard blocked: no
2: brcmfmac-wifi: Wireless LAN
	Soft blocked: no
	Hard blocked: no
3: hci0: Bluetooth
	Soft blocked: no
	Hard blocked: no
2

Crisliu7,

Could you try to scan other devices?

3

I could use hcitool scan to scan other devices. However, I have to use bluetoothctl to make TX2 discoverable and pairable.

4

Hi Crisliu7,

Could you try using default setting to connect the BT?
All settings → Bluetooth

5

what do you mean by “default setting”?

6

Hi Crisliu7,

Default setting means from below path to connect BT:
System Settings → Bluetooth → Turn on Bluetooth → Try to pair your BT device.

Thanks!

7

But my TX2 doesn’t have desktop, I can only control the bluetooth from command line.

8

Hi Crisliu7,

Test with bluetoothctl tool, confirmed I can paring successful on TX2/JetPack-3.3.

[bluetooth]# pair B4:CE:F6:30:52:16
Attempting to pair with B4:CE:F6:30:52:16
[CHG] Device B4:CE:F6:30:52:16 Connected: yes
Request confirmation
[agent] Confirm passkey 382962 (yes/no): yes
[CHG] Device B4:CE:F6:30:52:16 Modalias: bluetooth:v000Fp1200d1436
[CHG] Device B4:CE:F6:30:52:16 UUIDs: 00001105-0000-1000-8000-00805f9b34fb
[CHG] Device B4:CE:F6:30:52:16 UUIDs: 0000110a-0000-1000-8000-00805f9b34fb
[CHG] Device B4:CE:F6:30:52:16 UUIDs: 0000110c-0000-1000-8000-00805f9b34fb
[CHG] Device B4:CE:F6:30:52:16 UUIDs: 0000110e-0000-1000-8000-00805f9b34fb
[CHG] Device B4:CE:F6:30:52:16 UUIDs: 00001112-0000-1000-8000-00805f9b34fb
[CHG] Device B4:CE:F6:30:52:16 UUIDs: 00001115-0000-1000-8000-00805f9b34fb
[CHG] Device B4:CE:F6:30:52:16 UUIDs: 00001116-0000-1000-8000-00805f9b34fb
[CHG] Device B4:CE:F6:30:52:16 UUIDs: 0000112f-0000-1000-8000-00805f9b34fb
[CHG] Device B4:CE:F6:30:52:16 UUIDs: 00001200-0000-1000-8000-00805f9b34fb
[CHG] Device B4:CE:F6:30:52:16 UUIDs: 00001800-0000-1000-8000-00805f9b34fb
[CHG] Device B4:CE:F6:30:52:16 UUIDs: 00001801-0000-1000-8000-00805f9b34fb
[CHG] Device B4:CE:F6:30:52:16 Paired: yes
Pairing successful

Please following below link steps to test again or please try with JetPack-3.3:
https://docs.ubuntu.com/core/en/stacks/bluetooth/bluez/docs/reference/pairing/outbound

9

Yep, when you login to bluetoothctl, you can see your bluetooth controller on TX2. However, for my TX2, it always shows

No default controller available

I can do nothing because the bluetoothctl cannot detect there is bluetooth controller on my TX2.
However, the

hcitool dev

shows there is really bluetooth component on my TX2

10

Here is my status

rivs@zelda:/$ hcitool dev
Devices:
	hci0	00:04:4B:8C:D8:44
rivs@zelda:/$ rfkill list
0: bluedroid_pm: Bluetooth
	Soft blocked: no
	Hard blocked: no
1: phy0: Wireless LAN
	Soft blocked: no
	Hard blocked: no
2: brcmfmac-wifi: Wireless LAN
	Soft blocked: no
	Hard blocked: no
3: hci0: Bluetooth
	Soft blocked: no
	Hard blocked: no

[bluetooth]# show
No default controller available
[bluetooth]# scan on
No default controller available
11

Hi Crisliu7,

Please try below command and run bluetoothctl tool again:

sudo rfkill unblock bluetooth
12

it seems no use, cuz it already shows no block here

0: bluedroid_pm: Bluetooth
	Soft blocked: no
	Hard blocked: no
3: hci0: Bluetooth
	Soft blocked: no
	Hard blocked: no
13

Hi Crisliu7,

What’s image version are you using on TX2?
Please try JetPack-3.3 (r28.2.1). Thanks!

14

Here is my info

rivs@zelda:~/jetsonUtilities$ python jetsonInfo.py 
 NVIDIA Jetson TX2
 L4T 28.2.0 [ JetPack UNKNOWN ]
 Board: t186ref
 Ubuntu 16.04.4 LTS
 Kernel Version: 4.4.38-l4t-r28.2+g174510d
 CUDA NOT INSTALLED
15

I would suggest you to use the original Jetpack with HDMI connected and try with GUI.

If GUI still has error during BT scan/pair, please share the result of kernel log with command “dmesg” after the connection.