nrf5340 Zephyr smp_svr bluetooth advertising issue

Question

Hi, I want to enable Bluetooth support on nrf5340 for FOTA. Serial seems to work fine but BT doesn't seem to advertise. 
 I get the following error after flashing smp_svr with relevant overlays for BT and serial on appcore. 
 Does smp_svr include the components required by netcore automatically once flashed with CONFIG_BOOTLOADER_MCUBOOT=y on nrf5340? 
 or have I done anything wrong? 
 Can anybody help me out please? 
 
 *** Booting Zephyr OS build v2.7.0-rc3-136-g0e1ecb373a1b *** I: Starting bootloader I: Primary image: magic=good, swap_type=0x2, copy_done=0x1, image_ok=0x1 I: Secondary image: magic=unset, swap_type=0x1, copy_done=0x3, image_ok=0x3 I: Boot source: none I: Swap type: none I: Bootloader chainload address offset: 0x10000 I: Jumping to the first image slot *** Booting Zephyr OS build v2.7.0-rc3-136-g0e1ecb373a1b *** [00:00:00.006,317] <wrn> bt_hci_core: Failed to set device name (-12)

Thusara · Accepted Answer

Hey Amanda Hsieh , Thanks for the support! I managed to figure out the issue. Initially I used the original zephyr project as I got to know that it supports nrf5340. The result I got above was when I tried to flash smp_svr example within the zephyr project. (https://github.com/zephyrproject-rtos/zephyr) But didn't seem to activate the necessary components on the network core when flashing. But eventually I realized the soc requires separate images to be flashed onto the 2 cores so that one image enables the Bluetooth component on the network core where as the other image essentially host the smp_svr on the app core. I had to go with a multi-image build which didn't seem to work with Zephyr project alone - it only builds a single image hex. Didn't see any proper documentation on Zephyr project on that. I then tried NCS which properly built the merged.hex. Thanks to NCS, BT now advertises! Hope someone find this information useful. *** Booting Zephyr OS build v2.6.99-ncs1 *** I: Starting bootloader I: Primary image: magic=unset, swap_type=0x1, copy_done=0x3, image_ok=0x3 I: Secondary image: magic=unset, swap_type=0x1, copy_done=0x3, image_ok=0x3 I: Boot source: none I: Swap type: none I: Bootloader chainload address offset: 0xc000 *** Booting Zephyr OS build v2.6.99-ncs1 *** [00:00:00.012,512] smp_sample: build time: Oct 14 2021 17:16:10 [00:00:00.038,543] smp_bt_sample: Bluetooth initialized [00:00:00.041,961] smp_bt_sample: Advertising successfully started Br, Thusara