nRF52840 Dongle seems not support le extended advertising

[wootak.jung]

Hello,

I'm using nRF52840 Dongle with Zephyr hex built from zephyr/samples/bluetooth/hci_usb/.

But, it seems not support le extended advertising like below.

< HCI Command: LE Read Local Supported Features (0x08|0x0003) plen 0                                                                                           #37 [hci0] 8281.379929 > HCI Event: Command Complete (0x0e) plen 12                                                                                                                   #38 [hci0] 8281.496034       LE Read Local Supported Features (0x08|0x0003) ncmd 1         Status: Success (0x00)         Features: 0xff 0x49 0x01 0x00 0x00 0x00 0x00 0x00           LE Encryption           Connection Parameter Request Procedure           Extended Reject Indication           Slave-initiated Features Exchange           LE Ping           LE Data Packet Length Extension           LL Privacy           Extended Scanner Filter Policies           LE 2M PHY           LE Coded PHY           Channel Selection Algorithm #2           Minimum Number of Used Channels Procedure @ RAW Close: hcitool

and, when I execute extended adv related command. the result is here.

< HCI Command: LE Set Extended Scan Enable (0x08|0x0042) plen 6                                                                                                #33 [hci0] 2214.834790         Extended scan: Enabled (0x01)         Filter duplicates: Disabled (0x00)         Duration: 0 msec (0x0000)         Period: 0.00 sec (0x0000) > HCI Event: Command Status (0x0f) plen 4                                                                                                                      #34 [hci0] 2214.948804       LE Set Extended Scan Enable (0x08|0x0042) ncmd 1         Status: Unknown HCI Command (0x01) @ RAW Close: hcitool

< HCI Command: LE Set Extended Advertising Data (0x08|0x0037) plen 18                                                                                          #35 [hci0] 2426.866100         Handle: 0x06         Operation: Complete extended advertising data (0x03)         Fragment preference: Fragment all (0x00)         Data length: 0x0e         Flags: 0x1a           LE General Discoverable Mode           Simultaneous LE and BR/EDR (Controller)           Simultaneous LE and BR/EDR (Host)         Name (complete): Ayush3         TX power: -7 dBm > HCI Event: Command Status (0x0f) plen 4                                                                                                                      #36 [hci0] 2426.980259       LE Set Extended Advertising Data (0x08|0x0037) ncmd 1         Status: Unknown HCI Command (0x01) @ RAW Close: hcitool

Below is my environments.

Host PC: Ubuntu 20.04.3 LTS

Zephyr source code: https://github.com/zephyrproject-rtos/zephyr (commit: 20a05b68385193d23158303ce6e805b751fb3831)

[Einar Thorsrud]

Hi,

There is noting preventing the dongle from using extended advertising, but it depends on how you have configured the hci_usb project that is running on it.

I see you point directly to Zephyr, so please note that we only support using the nRF Connect SDK (of which Zephyr is a big part). If you are using vanilla Zephyr, you should try the Zephyr community instead.

Depending on which features you want to support, you need to add some configurations. Relevant configurations for extended advertising are (you may not need all and might want other configurations, so adjust as needed):

• CONFIG_BT_EXT_ADV=y
• CONFIG_BT_EXT_ADV_MAX_ADV_SET=2
• CONFIG_BT_CTLR_ADV_EXT=y
• CONFIG_BT_EXT_ADV_LEGACY_SUPPORT=y

[wootak.jung]

Thank you for your answer! when I enable above features, extended advertising seems to be enabled.

< HCI Command: LE Read Local Supported Features (0x08|0x0003) plen 0 #1 [hci0] 4.797483
> HCI Event: Command Complete (0x0e) plen 12 #2 [hci0] 4.926297
LE Read Local Supported Features (0x08|0x0003) ncmd 1
Status: Success (0x00)
Features: 0xff 0x59 0x01 0x00 0x00 0x00 0x00 0x00
LE Encryption
Connection Parameter Request Procedure
Extended Reject Indication
Slave-initiated Features Exchange
LE Ping
LE Data Packet Length Extension
LL Privacy
Extended Scanner Filter Policies
LE 2M PHY
LE Coded PHY
LE Extended Advertising
Channel Selection Algorithm #2
Minimum Number of Used Channels Procedure
@ RAW Close: hcitool