Non-blocking error at boot when trying WiFi/BLE coexistence on nRF7002-DK

[BENBF]

Hello,

I'm trying to test WiFi/BLE coexistence on nRF7002-DK and I'm having a error message when Zephyr OS is booting concerning NRF_RPC. Unfortunately, I couldn't find any explanation about this anywhere.
As the error message is printed before the first instruction of the main function, I'm assuming it's coming from the prj.con file but I don't know what could be missing. Does anyone have an idea ?

The error message is

*** Booting Zephyr OS build v3.2.99-ncs2 ***
[00:00:00.687,957] <err> nrf_rpc_ipc: init: IPC endpoint bond timeout
[00:00:00.687,957] <err> NRF_RPC: transport_init: Failed to initialize transport, err: -32
[00:00:01.688,049] <err> NRF_RPC: transport_init: Not all groups are ready to use.
[00:00:01.688,079] <inf> net_config: net_config_init_by_iface: Initializing network
[00:00:01.688,110] <inf> net_config: check_interface: Waiting interface 1 (0x20001658) to be up...

And my prj.conf file :

CONFIG_NEWLIB_LIBC=y

#Global attributes
CONFIG_GPIO=y

#SPI attributes
CONFIG_SPI=y

#PWM attributes
CONFIG_NRFX_PWM0=y

#WIFI attributes
CONFIG_NETWORKING=y
CONFIG_POSIX_API=y
CONFIG_NET_IPV4=y
CONFIG_NET_NATIVE=y
CONFIG_NET_SOCKETS_POSIX_NAMES=y
CONFIG_WIFI=y
CONFIG_WIFI_NRF700X=y
CONFIG_NET_TCP=y
CONFIG_NET_DHCPV4=y
CONFIG_NET_SOCKETS=y
CONFIG_NET_MGMT_EVENT_INFO=y
CONFIG_WPA_SUPP=y

CONFIG_POSIX_CLOCK=y

CONFIG_NET_L2_ETHERNET=y
CONFIG_NET_MGMT_EVENT_STACK_SIZE=2048

CONFIG_NET_CONFIG_SETTINGS=y
CONFIG_NET_CONFIG_MY_IPV4_ADDR="192.0.2.1"
CONFIG_NET_CONFIG_MY_IPV4_NETMASK="255.255.255.0"
CONFIG_NET_CONFIG_MY_IPV4_GW="192.168.1.1"

CONFIG_NET_MAX_CONTEXTS=10
CONFIG_NET_MAX_CONN=10

# Memories
CONFIG_NET_BUF_RX_COUNT=80
CONFIG_NET_BUF_TX_COUNT=80
CONFIG_NET_CONTEXT_NET_PKT_POOL=y
CONFIG_NET_BUF_DATA_SIZE=128
CONFIG_HEAP_MEM_POOL_SIZE=153600
CONFIG_NET_TC_TX_COUNT=0
CONFIG_MAIN_STACK_SIZE=4096
CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=4096
CONFIG_NET_TX_STACK_SIZE=4096
CONFIG_NET_RX_STACK_SIZE=4096


#BLE attributes
CONFIG_BT=y
CONFIG_BT_NUS=y
CONFIG_BT_GATT_DYNAMIC_DB=y
CONFIG_BT_GATT_CLIENT=y
CONFIG_BT_DEBUG_LOG=y
CONFIG_BT_MAX_CONN=1
CONFIG_BT_L2CAP_TX_BUF_COUNT=5
CONFIG_BT_PERIPHERAL=y
CONFIG_BT_DEVICE_NAME="TestName"
CONFIG_BT_DEVICE_APPEARANCE=962

CONFIG_BT_DEVICE_NAME_DYNAMIC=y
CONFIG_BT_DEVICE_NAME_MAX=30

#Coexistence attributes
CONFIG_NEWLIB_LIBC_FLOAT_PRINTF=y

CONFIG_DK_LIBRARY=y
CONFIG_DK_LIBRARY_DYNAMIC_BUTTON_HANDLERS=y
CONFIG_NRF700X_MAX_TX_PENDING_QLEN=8

CONFIG_MPSL_CX=y

# Networking
CONFIG_NET_LOG=y
CONFIG_NET_UDP=y
CONFIG_NET_PKT_RX_COUNT=8
CONFIG_NET_PKT_TX_COUNT=8
CONFIG_NET_CONTEXT_SYNC_RECV=y
CONFIG_INIT_STACKS=y

# Debugging
CONFIG_STACK_SENTINEL=y
CONFIG_DEBUG_COREDUMP=y
CONFIG_DEBUG_COREDUMP_BACKEND_LOGGING=y
CONFIG_DEBUG_COREDUMP_MEMORY_DUMP_MIN=y

# Kernel options
CONFIG_ENTROPY_GENERATOR=y

# Logging
CONFIG_LOG=y

#Power management
CONFIG_PM=y

Thank you,
Best regards

[Sigurd Hellesvik]

Hi,

Which version of the SDK do you use?

Which sample is this based on?
Does the sample work out of the box?

What do you want to achieve with the changes you made to the sample?

Reagrds,
Sigurd Hellesvik

[BENBF]

Hello,

I'm using v.2.3.0 and the code is based on the sr_coex sample in samples/wifi/.
Unfortunately, I couldn't use the sample as it is because it seems to require 2 dev boards (link).

What I'm trying to do is to get a list of the WiFi networks that the board sees on my smartphone using BLE for communication between my phone and the board. I also would like to use the shared antenna the nRF7002-DK offers.

Regards,

[Sigurd Hellesvik]

For your purpose, you can use the sr_coax sample with only the nRF7002-DK.

The second Development Kit is only needed if you intend to test Bluetooth Low Energy throughput.

[BENBF]

Thank you, I ended up using the prj.conf file of the example and the error was gone.
I tried to add the option one by one to my old prj.conf file but I couldn't find the one that was causing the error.

Thank you
Regards