Identical code to Peripheral HR Coded sample not working in my own project

RE: Identical code to Peripheral HR Coded sample not working in my own project

Vidar Berg — Wed, 23 Aug 2023 08:05:53 GMT

Of course. When building BLE applications for the nRF5340, you are building separate FW images for the application core and network core as explained here link. This happens automatically and is made possible with the SDKs Multi-image builds feature. And since you are building multiple different FW images, there is also a need to be able to change override the default Kconfig symbols for each image individually. This is where the 'child_image' folder comes in. In this folder you can place overlays for your child images. Please refer to the Image-specific variables section for more details.

The Kconfig symbols in proj.conf file in the root folder will only be applied to the parent FW image (i.e. your application).

RE: Identical code to Peripheral HR Coded sample not working in my own project

Michael Zeng — Wed, 23 Aug 2023 07:39:18 GMT

I see, thank you! Do you mind explaining the distinction/relationship between proj.conf in the root folder, the hci_rpmsg.conf in the child_image folder, and Kconfig?

RE: Identical code to Peripheral HR Coded sample not working in my own project

Vidar Berg — Wed, 23 Aug 2023 06:55:33 GMT

Hi Michael,

"W: opcode 0x2036 status 0x01"

This warning message means that support for the extended advertising feature has not been enabled in the Bluetooth controller running on the network core (hci_rpmsg).

Opcode 0x2036 corresponds to 'BT_HCI_OP_LE_SET_EXT_ADV_PARAM', and status 0x1 means the opcode was not recognized by the controller. Except from BT core spec., vol 1, part F:

2.1 UNKNOWN HCI COMMAND (0x01)
The Unknown HCI Command error code indicates that the Controller does not
understand the HCI Command packet opcode that the Host sent. The opcode
given might not correspond to any of the opcodes specified in this document,
or any vendor-specific opcodes, or the command may have not been
implemented.

To fix this, copy the 'child_image' folder from the peripheral_hr_code sample to your project source directory and do a pristine build. The child image folder contains the hci_rpmsg.conf overlay which will be applied to your controller build and enable support for advertising extensions.

Best regards,

Vidar