Central PAST scan failed

[LandyWang]

Hello,

I'm using central_past sample on nrf5340 audio DK board, and select nrf5340dk_nrf5340_cpuapp_ns for Build Target.

I added the following config to enable RTT log in prj.conf, other than that I did not make any changes.

CONFIG_USE_SEGGER_RTT=y
CONFIG_RTT_CONSOLE=y

I have used nRF Connect SDK 2.2.0, 2.4.0, 2.6.0 and 2.7.0, and the results are the same as follows:

SEGGER J-Link V7.94i - Real time terminal output
SEGGER J-Link (unknown) V1.0, SN=1050135643
Process: JLink.exe
*** Booting Zephyr OS build v3.3.99-ncs1 ***
Starting Central Periodic Advertising Synchronization Transfer (PAST) Demo
[00:00:00.405,975] <inf> bt_hci_core: hci_vs_init: HW Platform: Nordic Semiconductor (0x0002)
[00:00:00.406,005] <inf> bt_hci_core: hci_vs_init: HW Variant: nRF53x (0x0003)
[00:00:00.406,036] <inf> bt_hci_core: hci_vs_init: Firmware: Standard Bluetooth controller (0x00) Version 224.11902 Build 2231721665
[00:00:00.407,714] <inf> bt_hci_core: bt_dev_show_info: Identity: EE:59:95:D7:A5:0C (random)
[00:00:00.407,745] <inf> bt_hci_core: bt_dev_show_info: HCI: version 5.4 (0x0d) revision 0x2077, manufacturer 0x0059
[00:00:00.407,775] <inf> bt_hci_core: bt_dev_show_info: LMP: version 5.4 (0x0d) subver 0x2077
Connection callbacks register
Scan callbacks register
Periodic Advertising callbacks register
Start scanning...[00:00:00.410,125] <wrn> bt_hci_core: bt_hci_cmd_send_sync: opcode 0x2041 status 0x01
failed (err -5)

How can I make this sample run normally?

[Jakob Ruhe]

I see. I have never used a nrf5340 so I am really not sure. But I know that it has two MCU:s, one typically used by the application and the other is used for the controller. Although powerful, I guess it also makes things a bit more complicated. So sometimes you need to flash also the controller. Perhaps that is what you are doing already?

Here someone had a similar problem (quite some time ago though) :

 Start scanning...failed (err -5) NCS2.2.0 

Does, for example, the sample application `samples/bluetooth/central` work for you? 

[LandyWang]

Thank you for your reply.

I use samples/bluetooth/central on nrf5340 audio DK and it works fine, and the scan starts successfully.

In addition, I copied the code of central_past to nrf\applications\nrf5340_audio and used it, and the scan could also start successfully.

I don't know why scan fail occurs when using samples\bluetooth\central_past alone.