BLE: Controller unresponsive, command opcode 0x2032 timeout with err -11

[R.L]

Hello,

I am following this course: https://academy.nordicsemi.com/courses/bluetooth-low-energy-fundamentals/lessons/lesson-3-bluetooth-le-connections/topic/blefund-lesson-3-exercise-2/ but when I get to step 7. Set our preferred PHY then I am running into this assert:

*** Booting nRF Connect SDK v3.2.1-d8887f6f32df ***
*** Using Zephyr OS v4.2.99-ec78104f1569 ***
Bluetooth initialized
Advertising successfully started
Connected
Connection parameters: interval 48.75 ms, latency 0 intervals, timeout 5000 ms
ASSERTION FAIL [err == 0] @ WEST_TOPDIR/zephyr/subsys/bluetooth/host/hci_core.c:504
        Controller unresponsive, command opcode 0x2032 timeout with err -11
r0/a1:  0x00000003  r1/a2:  0x00000000  r2/a3:  0x00000001
r3/a4:  0x00000003 r12/ip:  0x00000000 r14/lr:  0x00010801
 xpsr:  0x21000000
s[ 0]:  0x00000000  s[ 1]:  0x0000ec4f  s[ 2]:  0x00020000  s[ 3]:  0x0000ec11
s[ 4]:  0x00000000  s[ 5]:  0x00000000  s[ 6]:  0x00000000  s[ 7]:  0x2000788c
s[ 8]:  0x00000000  s[ 9]:  0x0001c281  s[10]:  0x00021faf  s[11]:  0x20003fac
s[12]:  0xfffffff5  s[13]:  0x00010801  s[14]:  0x00021faf  s[15]:  0x00002032
fpscr:  0xfffffff5
Faulting instruction address (r15/pc): 0x00010810

I have the U-Blox NINA B302 module, inside is the nRF52840. 

Any advice would be much appreciated!

Best regards

[R.L]

ANSWER: adding the following symbols to my prj.conf fixed the problem. The actual problem, if I am correct, is that these symbols are only said to be included later on in the instructions.

CONFIG_BT_RX_STACK_SIZE=2048
CONFIG_BT_BUF_CMD_TX_COUNT=2