Cannot enable bluetooth when running the peripheral uart example on custom nrf5340 board.

[Sheona]

Hi, 

I am trying to run the peripheral_uart service example, with the hci_rpmsg on the network core

When the clock configuration (on the main application core) is set as below, I am able to enable the bluetooth, but the connection made with the device is broken almost instantly with error reason 8. 

CONFIG_CLOCK_CONTROL_NRF_K32SRC_SYNTH=y

CONFIG_CLOCK_CONTROL_NRF_K32SRC_XTAL=n

CONFIG_SOC_LFXO_CAP_INT_7PF=y

CONFIG_SOC_HFXO_CAP_INTERNAL=y

CONFIG_SOC_HFXO_CAP_INT_VALUE_X2=27

If on the other hand I use the following, I am stuck waiting for bluetooth to be enabled. This setting used to work initially until the board was reset. 

CONFIG_CLOCK_CONTROL_NRF_K32SRC_RC=y

CONFIG_CLOCK_CONTROL_NRF_K32SRC_XTAL=n

CONFIG_CLOCK_CONTROL_NRF_K32SRC_250PPM=y

CONFIG_SOC_LFXO_CAP_INT_7PF=y

CONFIG_SOC_HFXO_CAP_INTERNAL=y

CONFIG_SOC_HFXO_CAP_INT_VALUE_X2=27

Could you please guide me on what I should do to fix either of the above issues?

Maybe nice to know, I am using the nrf 1.9.1 sdk version with zephyr version 2.7.99

Thank you very much 

Sheona 

[Sheona]

Hi, 

A small update: I think we found the problem was to do with the signal strength. 

[Priyanka]

Hi Sheona,

Do you still face the issue?

Best Regards,

Priyanka

[Sheona]

no, it has been fixed. 

Thanks a lot though :)

[danielHC]

Hi, I'm face the same problem, I'm not able to enable bt if I set clock to internal RC, can you kind advice how to fixed it?