Thread kick off too slow

[LanceTaiwan]

Hi,

    I encountered a "Thread kick off too slow" issue.  Let me explain it

My develop environment

Hardware: nRf7002-DK

SDK: 2.6.1

A. I copy the sample  nrf/samples/net/mqtt to my work space, use "wifi_cred add" to connect my WIFI. Everything is running well.

B. Because our environment only allow to use static IP, so I do the following changes

1. Disable DHCP client ( Mark CONFIG_NET_DHCPV4 )
2. Set CONFIG_NET_CONFIG_MY_IPV4_ADDR="192.168.0.201"
3. Set CONFIG_NET_CONFIG_MY_IPV4_GW="192.168.0.1"
4. Set CONFIG_DNS_SERVER_IP_ADDRESSES=y
5. Set CONFIG_DNS_SERVER1="192.168.0.1"

Beside the above changes, I modify nothing.  The result is

1. The samplecan connect to my WIFI and can send MQTT package to the server.
2. The network_task is trigger after 20 seconds ( in network.c )

My question is, if I use DHCP, the network_task is trigger almost immediately, why the same sample delays almost 20 seconds after I change to static IP?  

I tested nrf/samples/wifi/sta , both DHCP/STATIC IP work well.  I already try almost 3 days, any hit?

Thanks

Lance

[Charlie]

Hi Lance,

Sorry for the delay. After set the static IP outside my router DHCP IP pool. My device can successfully get the static IP with previous setting now.

I can observe the delay before following log appear. Look into the codes, it seems related to Zephyr NET Connection Manager. I will report this issue to our development team for further debugging.

<inf> network: Bringing network interface up and connecting to the network

Best regards,

Charlie

[LanceTaiwan]

Hi Charlie,

    So, what can I do now is waiting for your response, right?

Lance

[Charlie]

Hi Lance,

I did further comparison between generated build/mqtt/zephyr/.config.conf files when static IP enabled or not.

It figures out the default CONFIG_NET_CONFIG_INIT_TIMEOUT=30 effect the waiting time, it basically will still

wait for IPv4 address from DHCPv4 until this timeout. You can change it to 0 to trigger using static IP directly.

There are quite many samples set CONFIG_NET_CONFIG_INIT_TIMEOUT=0 when using static IP.

 

Best regards,

Charlie

[LanceTaiwan]

Hi Charlie,

    Thanks a lot and I will try tomorrow and let you know the result

Lance