Compatible bluetooth dongles for Odroid N2+

MyVolumio MyVolumio Help and Support
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1

Since there is no built-in Bluetooth module on the Odroid 2N+ board, are there any compatible USB Bluetooth dongles I could use?

2
4

I bought this dongle, but the only thing it did was add a WiFi option, which I don’t really need.
Bluetooth is still not available (I don’t see Volumio in the available Bluetooth devices on my phone).

I think the Bluetooth dongle is not recognized properly:

bash-5.0# hciconfig -a
hci0:   Type: Primary  Bus: USB
        BD Address: 00:00:00:00:00:00  ACL MTU: 0:0  SCO MTU: 0:0
        DOWN
        RX bytes:504 acl:0 sco:0 events:71 errors:0
        TX bytes:17714 acl:0 sco:0 commands:72 errors:0
        Features: 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
        Packet type: DM1 DH1 HV1
        Link policy:
        Link mode: SLAVE ACCEPT

bash-5.0# hciconfig hci0
hci0:   Type: Primary  Bus: USB
        BD Address: 00:00:00:00:00:00  ACL MTU: 0:0  SCO MTU: 0:0
        DOWN
        RX bytes:504 acl:0 sco:0 events:71 errors:0
        TX bytes:17714 acl:0 sco:0 commands:72 errors:0

bash-5.0# dmesg | grep luetooth
[   10.793947] Bluetooth: Core ver 2.22
[   10.793952] Bluetooth: Starting self testing
[   10.807530] Bluetooth: ECDH test passed in 13254 usecs
[   10.837825] Bluetooth: SMP test passed in 17 usecs
[   10.837839] Bluetooth: Finished self testing
[   10.837883] Bluetooth: HCI device and connection manager initialized
[   10.837890] Bluetooth: HCI socket layer initialized
[   10.837894] Bluetooth: L2CAP socket layer initialized
[   10.837907] Bluetooth: SCO socket layer initialized
[   10.857054] Bluetooth: hci0: rtl: examining hci_ver=08 hci_rev=000c lmp_ver=08 lmp_subver=8821
[   10.857059] Bluetooth: hci0: rtl: loading rtl_bt/rtl8821a_config.bin
[   10.861738] bluetooth hci0: Direct firmware load for rtl_bt/rtl8821a_config.bin failed with error -2
[   10.861752] Bluetooth: hci0: Failed to load rtl_bt/rtl8821a_config.bin
[   10.861754] Bluetooth: hci0: rtl: loading rtl_bt/rtl8821a_fw.bin
[   10.866063] Bluetooth: hci0: rom_version status=0 version=1
[   10.866082] Bluetooth: cfg_sz 0, total size 17428
[   11.303427] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[   11.303431] Bluetooth: BNEP filters: protocol multicast
[   11.303439] Bluetooth: BNEP socket layer initialized
[   12.941379] Bluetooth: hci0 command 0xfc20 tx timeout
[   21.005222] Bluetooth: hci0: download fw command failed (-110)
5

@gkkpch

Hi Gé,

Any suggestion?

6

please run the command

hcitool dev

7

hcitool shows no devices:

bash-5.0# hcitool dev
Devices:
8

the BT dongle is not recognized, maybe the kernel does not include the required drivers for that chipset

9

@gkkpch if it is true that drivers are not included in the kernel, is it possible to add support to it?
This dongle is the official Odroid N2 add-on available on the Hardkernel website.
It would be very nice to have the ability to turn on bluetooth and wifi on the Odroid N2 board :slight_smile: